Journal articles: 'NIR induced photocatalysis'

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Zhang, Kailian, Jie Guan, Ping Mu, Kai Yang, Yu Xie, Xiaoxiao Li, Laixi Zou, Weiya Huang, Changlin Yu, and Wenxin Dai. "Visible and near-infrared driven Yb3+/Tm3+ co-doped InVO4 nanosheets for highly efficient photocatalytic applications." Dalton Transactions 49, no. 40 (2020): 14030–45. http://dx.doi.org/10.1039/d0dt02318c.

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A possible mechanism was proposed for the excellent photocatalytic activities. The upconversion process induced by Yb³⁺/Tm³⁺ offered the suitable energy for the activation and subsequent photocatalysis under NIR irradiation.

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Zhaoyu, Ma, and Junying Zhang. "The Localized Surface Plasmon Resonances (LSPR) Origin of W₁₈O₄₉ and Application in Photocatalysis." ECS Meeting Abstracts MA2023-02, no. 47 (December 22, 2023): 2346. http://dx.doi.org/10.1149/ma2023-02472346mtgabs.

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A key solution for high-efficiency solar-to-fuel conversion is to fabricate semiconductor photocatalysts with ultra-broad spectral absorption and high charge-carriers utilization efficiency [1]. The localized surface plasmon resonances (LSPR) effect of W18O49 induces visible and near-infrared (NIR) light absorption efficiently, realizing full-spectrum solar-light driven photocatalysis [2]. Therefore, it is meaningful to study the LSPR origin and seek ways to make full use of photo-induced hot electron of W18O49. In our work, by density-functional theory calculation, the LSPR has been proposed to originate from the localized electron confinement around lattice W5+–W5+ pairs in the unique structure of W18O49, which explains the experimental results that W18O49 has a broad absorption ranging from visible to NIR region, independent of the particle shape and size. Hierarchical-structured W18O49 microflowers with high absorbance have been coated with ZnIn2S4 nanosheets to achieve cocatalyst-free photocatalytic composite, which exhibits outstanding H2 production of 902.57 µmol within 3 h under simulated solar-light. [3] Z-scheme photocatalytic heterojunction of W18O49 microflowers and g-C3N4 nanosheets has been constructed through electrostatic self-assembly method, which shows higher photocatalytic hydrogen production performance than the counterpart synthesized by hydrothermal method. [4] Reference [1] Q. Wang, K. Domen, Chem. Rev. 2020, 120, 919−985. [2] Z. Y. Zhang, J. D. Huang, Y. R. Fang, et al., Adv. Mater. 2017, 29, 1606688. [3] Y. Lu, X.F. Jia, Z.Y. Ma, et al., Adv. Funct. Mater., 2022, 32, 2203638. [4] Z. Y. Ma, W. P. Li, X. F. Jia, et al., Mater. Today. Adv. 2022, 15, 100249.

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Li, Yongjin, Lu Yao, Zhaoyi Yin, Zhiyuan Cheng, Shenghong Yang, and Yueli Zhang. "Defect-induced abnormal enhanced upconversion luminescence in BiOBr:Yb3+/Er3+ ultrathin nanosheets and its influence on visible-NIR light photocatalysis." Inorganic Chemistry Frontiers 7, no. 2 (2020): 519–28. http://dx.doi.org/10.1039/c9qi01275c.

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Cheng, Lu, Nuo Yu, Yan Zhang, Zhun Shi, Haifeng Wang, Zhigang Chen, and Lisha Zhang. "Synthesis of Cu2(OH)PO4 superstructures with NIR-laser enhanced photocatalytic activity." Functional Materials Letters 13, no. 03 (February 26, 2020): 2050015. http://dx.doi.org/10.1142/s1793604720500150.

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The development of photocatalysts with wide UV-Vis-near-infrared (NIR) photoabsorption has received tremendous interest for utilizing sunlight efficiently. In this work, Cu2(OH)PO4 superstructures are prepared by a simple hydrothermal route, and they have strong bandgap absorption in UV-Visible region and a distinctive plasmon resonance absorption in NIR region. Under the synergetic illumination of visible light and 980[Formula: see text]nm laser (3.0[Formula: see text]W[Formula: see text]cm[Formula: see text]), Cu2(OH)PO4 superstructures can degrade 89.2% MB with the elevated temperature ([Formula: see text]51∘C) of solution, which is higher than that from visible light group (50.0%), laser group (16.4%), and visible-light/exterior-heating group (62.5%, same temperature at [Formula: see text]51.0∘C). These facts reveal that Cu2(OH)PO4 superstructures exhibit NIR-laser enhanced photocatalytic activity, which not only comes from the photothermal effect-induced temperature elevation, but also mainly results from the increased production of photogenerated electron-hole pairs by NIR-laser. Therefore, Cu2(OH)PO4 superstructures can act as efficient photocatalyst with NIR-laser enhanced photocatalytic activity.

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Chen, Xianjie, Yuan Xu, Xinguo Ma, and Yongfa Zhu. "Large dipole moment induced efficient bismuth chromate photocatalysts for wide-spectrum driven water oxidation and complete mineralization of pollutants." National Science Review 7, no. 3 (December 2, 2019): 652–59. http://dx.doi.org/10.1093/nsr/nwz198.

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Abstract Herein, a wide-spectrum (∼678 nm) responsive Bi8(CrO4)O11 photocatalyst with a theoretical solar spectrum efficiency of 42.0% was successfully constructed. Bi8(CrO4)O11 showed highly efficient and stable photocatalytic water oxidation activity with a notable apparent quantum efficiency of 2.87% (420 nm), superior to many reported wide-spectrum driven photocatalysts. Most remarkably, its strong oxidation ability also enables the simultaneous degradation and complete mineralization for phenol, and its excellent performance is about 23.0 and 2.9 times higher than CdS and P25-TiO2, respectively. Its high activity is ascribed to the giant internal electric field induced by its large crystal dipole, which accelerates the rapid separation of photogenerated electron–hole pairs. Briefly, the discovery of wide-spectrum bismuth chromate and the mechanism of exponentially enhanced photocatalytic performance by increasing the crystal dipole throw light on improving solar energy conversion.

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Contreras, Enrique, Christian Palacios, I. Becerril-Castro, and José Romo-Herrera. "Plasmon Induced Photocatalysts for Light-Driven Nanomotors." Micromachines 12, no. 5 (May 19, 2021): 577. http://dx.doi.org/10.3390/mi12050577.

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Micro/nanomachines (MNMs) correspond to human-made devices with motion in aqueous solutions. There are different routes for powering these devices. Light-driven MNMs are gaining increasing attention as fuel-free devices. On the other hand, Plasmonic nanoparticles (NPs) and their photocatalytic activity have shown great potential for photochemistry reactions. Here we review several photocatalyst nanosystems, with a special emphasis in Plasmon induced photocatalytic reactions, as a novel proposal to be explored by the MNMs community in order to extend the light-driven motion of MNMs harnessing the visible and near-infrared (NIR) light spectrum.

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Su, Yuning, Guoqiang Tan, Chi Xu, Ting Liu, Ying Wang, Huijun Ren, and Ao Xia. "The up-conversion effect induced NIR-photocatalytic performance of Bi2−XErXWO6 photocatalysts." Materials Letters 211 (January 2018): 175–78. http://dx.doi.org/10.1016/j.matlet.2017.09.115.

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Altomare, Marco, Shanshan Qin, Viktoriia A. Saveleva, Zdenek Badura, Ondrej Tomanec, Anca Mazare, Giorgio Zoppellaro, et al. "Metastable Ni(I)-TiO_2-X Photocatalyst: Self-Amplifying H₂ Evolution from Plain Water without Noble Metal Co-Catalyst and Sacrificial Agent." ECS Meeting Abstracts MA2023-02, no. 47 (December 22, 2023): 2306. http://dx.doi.org/10.1149/ma2023-02472306mtgabs.

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This contribution describes the self-assembling and self-activating nature of a TiO2 photocatalyst that generates hydrogen from water in the absence of sacrificial species or noble metal co-catalysts [1]. Such system forms when nanoparticles of reduced anatase TiO2 are illuminated in an aqueous Ni2+ solution [2,3]. UV illumination creates in-situ a Ni+/TiO2/Ti3+ photocatalyst that over time produces H2 at a higher rate. Thus, UV light is both the synthesis tool that forms this active metastable photocatalytic entity and the energy provider for this entity to enable H2 evolution from water. Operando X-ray absorption (XAS) and electron paramagnetic (EPR) spectroscopies show that key to self-assembly and self-activation is the light-induced formation of defects in the semiconductor [4], which enables the formation of monovalent Ni+ surface states. Metallic nickel states, i.e., Ni0, do not form, neither in the dark (resting state) nor under illumination (active state). Once the catalyst is assembled, the Ni+ surface states act as electron relay for electron transfer to form H2 from water. Self-amplifying reaction schemes of this type entail considerable potential for developing a new generation of photocatalysts via simple one-pot synthesis routes. References [1] M. Altomare, S. Qin, V.A. Saveleva, Z. Badura, O. Tomanec, G. Zoppellaro, A. Vertova, A. Taglietti, A. Minguzzi, P. Ghigna, P. Schmuki, under review. [2] S. Qin, Z. Badura, N. Denisov, O. Tomanec, S. Mohajernia, N. Liu, S. Kment, G. Zoppellaro, P. Schmuki, Electrochem. Commun. 122 (2021) 106909. [3] A. Naldoni, M. Altomare, G. Zoppellaro, N. Liu, Š. Kment, R. Zbořil, P. Schmuki, ACS Catal. 9 (2019) 345–364. [4] E. Wierzbicka, X. Zhou, N. Denisov, J.E. Yoo, D. Fehn, N. Liu, K. Meyer, P. Schmuki, ChemSusChem. 12 (2019) 1900–1905.

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Yu, Yanlong, Jun Zhang, Yi Lin, Dandan Zhao, Ziying Li, and Sai Yan. "Facile Synthesis of Ni3+/Co3+ Ion-Doped Zn2SnO4 Microspheres toward Efficient Photocatalytic CO2 Reduction." Applied Sciences 13, no. 24 (December 12, 2023): 13193. http://dx.doi.org/10.3390/app132413193.

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The photocatalytic reduction of CO2 into hydrocarbons is a promising solution for the energy crisis and greenhouse gas emissions. Thus, the fabrication and development of a new type of photocatalyst is of great importance for the practical application of CO2 reduction. Herein, we report a facile synthesis of Zn2SnO4 (ZTO) microspheres doped with Co3+ ions or Ni3+ ions. The doped Co3+/Ni3+ ions substitute the lattice Zn/Sn ions. DFT calculations and experimental results reveal that the doped Co3+/Ni3+ ions would induce new doping energy levels in the band gap, extend the light response from the UV to the visible region, and separate the charge carriers. As a result, compared with pure ZTO, the photocatalytic activity of a CO2 reduction into CH4 is significantly improved for Co-doped ZTO (Co-ZTO) and Ni-doped ZTO (Ni-ZTO).

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Xia, Xinyuan, Ning Deng, Guanwei Cui, Junfeng Xie, Xifeng Shi, Yingqiang Zhao, Qian Wang, Wen Wang, and Bo Tang. "NIR light induced H2evolution by a metal-free photocatalyst." Chemical Communications 51, no. 54 (2015): 10899–902. http://dx.doi.org/10.1039/c5cc02589c.

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Graus, Javier, Carlos Bueno-Alejo, and Jose Hueso. "In-Situ Deposition of Plasmonic Gold Nanotriangles and Nanoprisms onto Layered Hydroxides for Full-Range Photocatalytic Response towards the Selective Reduction of p-Nitrophenol." Catalysts 8, no. 9 (August 27, 2018): 354. http://dx.doi.org/10.3390/catal8090354.

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In this work, we present photocatalysis as a greener alternative to conventional catalysis where harsh reaction conditions, temperature and/or pressure are needed. Photodegradation of organic pollutants is a cost-effective, eco-friendly solution for the decontamination of water and air, and is a field that has been continuously growing over the last decade. Plasmonic metal nanoparticles absorb light irradiation that is transferred to the chemical reaction in a different fashion. Furthermore, plasmonic nanostructures can be combined with other materials, such as semiconductors or a basic support, to create hybrid systems capable of overcoming certain challenges that photocatalysis is facing nowadays and to expand the photocatalytic response towards the whole visible-near infrared (Vis-NIR) ranges. The main objective of this work has been to in-situ synthesize plasmonic anisotropic gold nanoparticles onto hydrotalcite (HT) and calcined hydrotalcite (CHT) supports by way of a sequential deposition-reduction (DR) process and to evaluate their efficiency as heterogeneous catalysts towards the selective oxidation of p-nitrophenol (hereafter 4-NP), a well-known model contaminant, either in the absence or the presence of full-range light irradiation sources (LEDs) spanning the whole UV-Vis-NIR range. Special attention has been paid to the optimization of the catalyst preparation parameters, including the pH and the concentration of reducing and stabilizing agents. Interestingly, the use of thermally modified hydrotalcites has enabled a strong metal-support interaction to induce the preferential formation of triangular-shaped Au nanoparticles with ca. 0.8 wt.% loading while increasing the colloidal stability and surface area of the catalyst with respect to the commercial untreated HT supports.

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Ruan, Daming, Jiawei Xue, Mamoru Fujitsuka, and Tetsuro Majima. "Ultrafast spectroscopic study of plasmon-induced hot electron transfer under NIR excitation in Au triangular nanoprism/g-C3N4 for photocatalytic H2 production." Chemical Communications 55, no. 43 (2019): 6014–17. http://dx.doi.org/10.1039/c9cc02574j.

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Liu, Lequan, Xinnan Zhang, Lufeng Yang, Liteng Ren, Defa Wang, and Jinhua Ye. "Metal nanoparticles induced photocatalysis." National Science Review 4, no. 5 (February 24, 2017): 761–80. http://dx.doi.org/10.1093/nsr/nwx019.

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Abstract Photocatalysis induced by light absorption of metal nanoparticles (NPs) has emerged as a promising strategy for exploiting efficient visible-light-responsive composites for solar-energy conversion. In this review, we first introduce the light absorption of metal NPs and the mechanisms proposed in metal-induced photocatalysis (MIP). Then, its applications in water splitting, artificial photosynthesis and inert molecular activation are summarized. To address the challenge of low efficiency in this field, strategies in promoting catalytic activity are reviewed, and particular attention is paid to the particle-size effect of metal. Finally, the challenges and possible development directions of MIP are briefly discussed.

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Mavengere, Shielah, Sang-Chul Jung, and Jung-Sik Kim. "Effect of Coupling Indium Tin Oxide with the TiO2–NaYF4:(Gd, Si) Composite for Photocatalytic Properties." Journal of Nanoscience and Nanotechnology 20, no. 12 (December 1, 2020): 7629–35. http://dx.doi.org/10.1166/jnn.2020.18869.

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Indium tin oxide (ITO) nanoparticles were coupled with NaYF4:(Gd, Si) using a TiO2-solution impregnation method. Scanning electron microscopy confirmed that TiO2 and ITO nanoparticles were loaded on the surface of the NaYF4:(Gd, Si) upconversion phosphor. The ultraviolet/visible spectra of the 20 wt.% ITO-NaYF4:(Gd, Si)/TiO2 composites were extended at the absorption edges towards the UV-visible region. The 20 wt.% ITO-coupled NaYF4:(Gd, Si)/TiO2 composites exhibited superior photocatalytic efficiency compared to only NaYF4:(Gd, Si)/TiO2 under near-infrared (NIR) irradiation. Multi-wavelength NIR photons of γ > 760 nm from a Xe solar simulator source induced photo-activation through the NaYF4:(Gd, Si) activator centers. The three-cycle photocatalytic reusability performance of the 20 wt.% ITO-impregnated NaYF4:(Gd, Si)/TiO2 composite was positively enhanced by up to 20% more than that of NaYF4:(Gd, Si)/TiO2.

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Kong, Xin Ying, Yen Yee Choo, Siang-Piao Chai, Ai Kah Soh, and Abdul Rahman Mohamed. "Oxygen vacancy induced Bi2WO6 for the realization of photocatalytic CO2 reduction over the full solar spectrum: from the UV to the NIR region." Chemical Communications 52, no. 99 (2016): 14242–45. http://dx.doi.org/10.1039/c6cc07750a.

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Wang, Ying, Guoqiang Tan, Bin Li, Mingyue Dang, Long Lv, Min Wang, Dan Zhang, Huijun Ren, and Ao Xia. "Enhanced NIR photocatalytic of Ag-RGO@{010}BiVO4/RGO@{110} BiVO4 photocatalysts induced by resonance effect of transverse electric of RGO and transverse magnetic of Ag." Applied Surface Science 489 (September 2019): 1–12. http://dx.doi.org/10.1016/j.apsusc.2019.05.145.

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Shin, Jongmin, Jeong Yeon Do, Raeyeong Kim, Namgyu Son, No-Kuk Park, Ho-Jung Ryu, Myung Won Seo, Junhwa Chi, Young-Sang Youn, and Misook Kang. "Catalytic Activity of Ni1-xLi2xWO4 Particles for Carbon Dioxide Photoreduction." Catalysts 9, no. 5 (May 21, 2019): 467. http://dx.doi.org/10.3390/catal9050467.

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This study introduces NiWO4 as a main photocatalyst, where the Ni component promotes methanation to generate a WO3-based catalyst, as a new type of catalyst that promotes the photoreduction of carbon dioxide by slowing the recombination of electrons and holes. The bandgap of NiWO4 is 2.74 eV, which was expected to improve the initial activity for the photoreduction of carbon dioxide. However, fast recombination between the holes and electrons was also expected. To overcome this problem, attempts were made to induce structural defects by partially replacing the Ni2+ ions in NiWO4 with Li+. The resulting CO2 conversion reaction was greatly enhanced with the Ni1-xLi2xWO4 catalysts containing Li+, compared to that of the pure NiWO4 catalysts. Notably, the total amount of CO and CH4 produced with the Ni0.8Li0.4WO4 catalyst was 411.6 nmol g−1. It is believed that the insertion of Li+ ions into the NiWO4 skeleton results in lattice defects due to charge and structural imbalance, which play a role in the capture of CO2 gas or excited electrons, thereby inhibiting recombination between the electrons and holes in the Ni1-xLi2xWO4 particles.

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Malferrari, Marco, Paola Turina, Francesco Francia, Alberto Mezzetti, Winfried Leibl, and Giovanni Venturoli. "Dehydration affects the electronic structure of the primary electron donor in bacterial photosynthetic reaction centers: evidence from visible-NIR and light-induced difference FTIR spectroscopy." Photochemical & Photobiological Sciences 14, no. 2 (2015): 238–51. http://dx.doi.org/10.1039/c4pp00245h.

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El Hakim, Sara, Mathéo Bathias, Tony Chave, and Sergey I. Nikitenko. "Influence of Butanol Isomerization on Photothermal Hydrogen Production over Ti@TiO2 Core-Shell Nanoparticles." Catalysts 12, no. 12 (December 17, 2022): 1662. http://dx.doi.org/10.3390/catal12121662.

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In this work, we reported for the first time the effect of butanol isomerization on the photothermal production of hydrogen in the presence of a noble, metal-free Ti@TiO2 core-shell photocatalyst. The experiments were performed in aqueous solutions of 1-BuOH, 2-BuOH, and t-BuOH under Xe lamp irradiation (vis/NIR: 8.4 W, UV: 0.6 W) at 35–69 °C. The increase in temperature significantly enhanced H2 formation, indicating a strong photothermal effect in the studied systems. However, in dark conditions, H2 emission was not observed even at elevated temperatures, which clearly points out the photonic origin of H2 photothermal formation. The rate of H2 production followed the order of 1-BuOH >> 2-BuOH > t-BuOH in the entire range of studied temperatures. In the systems with 1-BuOH and 2-BuOH, hydrogen was the only gaseous product measured online in the outlet carrier argon using mass spectrometry. By contrast, a mixture of H2, CH4, and C2H6 was detected for t-BuOH, indicating a C–C bond scission with this isomer during photocatalytic degradation. The apparent activation energies, Ea, with 1-BuOH/2-BuOH isomers (20–21 kJ·mol−1) was found to be larger than for t-BuOH (13 kJ·mol−1). The significant difference in thermal response for 1-BuOH/2-BuOH and t-BuOH isomers was ascribed to the difference in the photocatalytic mechanisms of these species. The photothermal effect with 1-BuOH/2-BuOH isomers can be explained by the thermally induced transfer of photogenerated, shallowly trapped electron holes to highly reactive free holes at the surface of TiO2 and the further hole-mediated cleavage of the O-H bond. In the system with t-BuOH, another mechanism could also contribute to the overall process through hydrogen abstraction from the C–H bond by an intermediate •OH radical, leading to CH3• group ejection. Formation of •OH radicals during light irradiation of Ti@TiO2 nanoparticle suspension in water has been confirmed using terephthalate dosimetry. This analysis also revealed a positive temperature response of •OH radical formation.

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Lu, Yue, Yang Li, Yuyan Wang, and Junying Zhang. "Two-photon induced NIR active core-shell structured WO3/CdS for enhanced solar light photocatalytic performance." Applied Catalysis B: Environmental 272 (September 2020): 118979. http://dx.doi.org/10.1016/j.apcatb.2020.118979.

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Saadati, Maryam, Omid Akhavan, and Hossein Fazli. "Single-Layer MoS2-MoO3-x Heterojunction Nanosheets with Simultaneous Photoluminescence and Co-Photocatalytic Features." Catalysts 11, no. 12 (November 27, 2021): 1445. http://dx.doi.org/10.3390/catal11121445.

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Single-layer MoS2-MoO3-x heterojunction nanosheets with visible-light-sensitive band gap energy and average lateral dimensions of ~70 nm were synthesized by using a two-step combined exfoliation method. The exfoliation was initiated from pristine MoS2, while some sulfur sites in expanded MoS2 sheets during exfoliating were substituted by ambient non-thermal oxygen, resulting in formation of α-MoO3-x crystalline domains. The morphological features, crystalline structure, phase formation, number of layers, and optical properties of the MoS2-MoO3-x nanosheets were determined by atomic force microscopy; X-ray diffraction; field emission electron microscopy; transmission electron microscopy; and Raman, UV–visible–NIR, diffuse transmittance, and photoluminescence spectroscopies. The produced α-MoO3-x domains displayed a narrower indirect band gap energy (~1.95 eV) than that of stoichiometric MoO3 (~3 eV), and a broad light absorption range from visible to near-infrared region can act as a plasmonic material facilitating the separation of the photoinduced carriers and enhancing the photocatalytic activity of the MoS2 domain, having ~1.75(2.16) eV indirect (direct) band gap energy. In this regard, the MoS2-MoO3-x heterojunction nanosheets showed single-layer-based excitation-dependent luminescence emissions and visible-light-induced photocatalytic features, at the same time. This study can contribute to promising applications of sheet-like nanomaterials for purposes requiring simultaneous photoluminescence and photocatalytic features, such as in-vivo monitoring and targeting.

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Long, Haoyu, Duoduo Gao, Ping Wang, Xuefei Wang, Feng Chen, and Huogen Yu. "Amorphization-induced reverse electron transfer in NiB cocatalyst for boosting photocatalytic H2 production." Applied Catalysis B: Environmental 340 (January 2024): 123270. http://dx.doi.org/10.1016/j.apcatb.2023.123270.

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Tan, Linxiang, Danni Li, Lijuan Zhang, Lai Xu, Yuling Zhao, Lanlan Zhu, and Ru Qiao. "Preparation of Multishell-Structured NaYF4:Yb,Tm,Nd@NaYF4:Yb,Nd@SiO2@ZnO Nanospheres with Effective NIR-Induced Photocatalytic Activity." Journal of Physical Chemistry C 124, no. 33 (July 29, 2020): 18081–90. http://dx.doi.org/10.1021/acs.jpcc.0c04528.

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Gryko, Dorota. "Porphyrins – Effective Photocatalysts for Red Light-Induced Functionalizations of Biomolecules." ECS Meeting Abstracts MA2023-01, no. 15 (August 28, 2023): 1433. http://dx.doi.org/10.1149/ma2023-01151433mtgabs.

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Recently, photoredox catalysis has begun to influence molecular biology and medical sciences for its mild conditions for generating highly reactive species (i.e., radicals), enabling novel and selective functionalisations of biomolecules.[1] In line with this, porphyrins, which can transfer energy (photosensitization) or electrons (photoredox catalysis) when exposure to light, seem to be highly advantageous. Given that their electron absorption shows a characteristic Soret band at 420 nm with a high molar extinction coefficient (105 M-1 cm-1),[2] they have been mainly used in blue-light-induced reactions. These molecules, however, absorb red light (four Q-bands at 518, 553, 592 and 648 nm with molar extinction coefficients of 104 M-1 cm), which has the benefit of low energy, lower health risks,[3] and more in-depth penetration of various media.[4] Fig. 1: Porphyrins in red lightinduced transformations We established that due to their diverse photophysical properties, porphyrins promote photoinduced electron transfer events under red light irradiation.[5] They act as effective photooxidants (alkylation of carbonyl compounds, thiol-ne reaction and reductive decarboxylation) and photoreductants (in arylation of heteroarenes, selenylation, thiolation and reduction of nitro compounds). These bioinspired photocatalysts exhibit features that outperform other catalysts operating under red light, as they are really non-toxic and can be applied in biological systems. Thus, we believe that free-radical porphyrins are a valuable contribution to the set of red-light photocatalysts, and this study will lead to more practical biosynthetic applications. References [1] Liu, W.; Watson, E. E.; Winssinger, N. Chim. Acta 2021, 104, e202100179 [2] Giovanetti, R. The Use of Spectrophotometry UV-Vis for the Study of Porphyrins, Macro to Nano Spectroscopy, 2012, ISBN 978-953-51-0664-7, InTech [3] Smith, A. M.; Mancini, M. C.; Nie, S. Nature Nanotechnology 2009, 4, 710–711. [4] Szacilowski, K.; Macyk, W.; Drzewiecka-Matuscek, A.; Brindell, M.; Stochel, G. Rev. 2005, 105, 2647–2694. [5] Rybicka-Jasińska, K.; Wdowik, T.; Łuczak, K.; Wierzba, A.J.; Drapała, O.; Gryko, D. ACS Org. Inorg. Au 2022, 2, 422–426. Figure 1

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Qi, Min, Lihui Fan, Yanming Shen, Hong Zou, Xiaolu Tian, Dongbin Liu, and Shifeng Li. "Improved Visible-Light-Induced Photocatalytic Performance of ZnAl Layered Double Hydroxide by Incorporation of Ni2+." Journal of Nanoscience and Nanotechnology 18, no. 1 (January 1, 2018): 753–60. http://dx.doi.org/10.1166/jnn.2018.13940.

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He, Jiehong, Pin Lyu, Bo Jiang, Shaoshuai Chang, Haoran Du, Jian Zhu, and Hexing Li. "A novel amorphous alloy photocatalyst (NiB/In2O3) composite for sunlight-induced CO2 hydrogenation to HCOOH." Applied Catalysis B: Environmental 298 (December 2021): 120603. http://dx.doi.org/10.1016/j.apcatb.2021.120603.

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do Nascimento Silva Leandro, Maria Karollyna, João Victor Barbosa Moura, Ana Carolina Justino de Araújo, Priscilla Ramos Freitas, Cicera Laura Roque Paulo, Amanda Karine de Sousa, Janaina Esmeraldo Rocha, et al. "Silver Trimolybdate (Ag2Mo3O10.2H2O) Nanorods: Synthesis, Characterization, and Photo-Induced Antibacterial Activity under Visible-Light Irradiation." Bioinorganic Chemistry and Applications 2022 (July 9, 2022): 1–9. http://dx.doi.org/10.1155/2022/2260083.

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The present study reports the synthesis, characterization, and antibacterial properties of silver trimolybdate (Ag2Mo3O10.2H2O) nanorods. The synthesis was performed using a conventional hydrothermal method. The sample was characterised by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, UV–Vis–NIR diffuse reflectance, thermogravimetric analysis (TGA), and differential scanning calorimeter (DSC). The direct antibacterial activity was evaluated using the microdilution method to determine the minimum inhibitory concentration (MIC). To assess the ability of Ag2Mo3O10.2H2O nanorods to modulate antibacterial resistance, the MIC of aminoglycosides was established in the presence of a subinhibitory concentration of this substance alone and associated with LED light exposure. The characterization of the sample indicated that the synthesis of silver trimolybdate generated nanometric crystals with rod-like morphology, without secondary phases. The treatment with Ag2Mo3O10.2H2O nanorods alone or combined with visible LED lights exhibited clinically relevant antibacterial activity against both Gram-negative and Gram-positive bacteria. This nanostructure presented a variable antibiotic-modulating action, which was not improved by visible LED light exposure. Nevertheless, LED lights showed promising antibiotic-enhancing activities in the absence of Ag2Mo3O10.2H2O nanorods. In conclusion, silver trimolybdate dihydrate nanorods have antibacterial properties that can be photocatalysed by visible-light exposure. While showing the potential use to combat antibacterial resistance, the simultaneous combination of silver trimolybdate, visible LED lights, and antibacterial drugs should be carefully analysed to avoid antagonist effects that could impair the effectiveness of antibiotic therapy.

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Wang, Yanwu, Xuehong Zhang, Yuchun Ji, Guoyuan Zheng, Jilin Wang, and Fei Long. "Synthesis of M (M=Co2+, Co2+/Ni2+)-doped FeS2 Nanospheres with Enhanced Visible-light-induced Photocatalytic Activity." Journal of Wuhan University of Technology-Mater. Sci. Ed. 33, no. 4 (July 12, 2018): 802–11. http://dx.doi.org/10.1007/s11595-018-1897-6.

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Ma, Liang, Da-Jie Yang, Xiang-Ping Song, Hai-Xia Li, Si-Jing Ding, Lun Xiong, Ping-Li Qin, and Xiang-Bai Chen. "Pt Decorated (Au Nanosphere)/(CuSe Ultrathin Nanoplate) Tangential Hybrids for Efficient Photocatalytic Hydrogen Generation via Dual‐Plasmon‐Induced Strong VIS–NIR Light Absorption and Interfacial Electric Field Coupling." Solar RRL 4, no. 1 (September 30, 2019): 1900376. http://dx.doi.org/10.1002/solr.201900376.

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Wang, Jie, Xianmo Gu, Linjuan Pei, Peng Kong, Jin Zhang, Xiaoyu Wang, Ruiyi Wang, Eric R. Waclawik, and Zhanfeng Zheng. "Strong metal-support interaction induced O2 activation over Au/MNb2O6 (M = Zn2+, Ni2+ and Co2+) for efficient photocatalytic benzyl alcohol oxidative esterification." Applied Catalysis B: Environmental 283 (April 2021): 119618. http://dx.doi.org/10.1016/j.apcatb.2020.119618.

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Yousefzadeh, Firouzeh, Leila Kafi-Ahmadi, and Shahin Khademinia. "Visible Light Induced Photocatalytic Degradation of Malachite Green by Solid State Synthesized MgFeO3–MgFe2MxO4 + δ (M = None, Mn4+, Ni2+, Zn2+, Eu3+, Dy3+, Yb3+) Nanocomposites." Catalysis Letters 149, no. 6 (March 18, 2019): 1660–79. http://dx.doi.org/10.1007/s10562-019-02733-7.

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Bello, Ruby, Elena Rodríguez-Aguado, Victoria A. Smith, Dmitry Grachev, Enrique Rodríguez Castellón, and Svetlana Bashkova. "Ni-Doped Ordered Nanoporous Carbon Prepared from Chestnut Wood Tannins for the Removal and Photocatalytic Degradation of Methylene Blue." Nanomaterials 12, no. 10 (May 10, 2022): 1625. http://dx.doi.org/10.3390/nano12101625.

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In this work, Ni-doped ordered nanoporous carbon was prepared by a simple and green one-pot solvent evaporation induced self-assembly process, where chestnut wood tannins were used as a precursor, Pluronic® F-127 as a soft template, and Ni2+ as a crosslinking agent and catalytic component. The prepared carbon exhibited a 2D hexagonally ordered nanorod array mesoporous structure with an average pore diameter of ~5 nm. Nickel was found to be present on the surface of nanoporous carbon in the form of nickel oxide, nickel hydroxide, and metallic nickel. Nickel nanoparticles, with an average size of 13.1 nm, were well dispersed on the carbon surface. The synthesized carbon was then tested for the removal of methylene blue under different conditions. It was found that the amount of methylene blue removed increased with increasing pH and concentration of carbon but decreased with increasing concentration of methylene blue. Furthermore, photocatalytic tests carried out under visible light illumination showed that purple light had the greatest effect on the methylene blue adsorption/degradation, with the maximum percent degradation achieved at ~4 h illumination time, and that the percent degradation at lower concentrations of methylene blue was much higher than that at higher concentrations. The adsorption/degradation process exhibited pseudo second-order kinetics and strong initial adsorption, and the prepared carbon showed high magnetic properties and good recyclability.

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Bao, Jianfeng, Jun Li, and Yiling Yang. "Surface Chemistry Mediated Near‐Infrared Light Direct Driven Photocatalysis toward Solar Energy Conversion: Classification and Application in Energy, Environmental and Biological Fields." Solar RRL, August 23, 2023. http://dx.doi.org/10.1002/solr.202300588.

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Understanding the mechanism underlying effect of surface chemistry on near‐infrared (NIR) photon harvesting will provide valuable guidance in developing novel high‐efficient photocatalysts for water cleaning and fuel generation. Efficient capture of NIR light, which occupies more than 50% in solar light, is a tall order in photocatalysis because of its relative low energy photons. Recently, NIR responsive photocatalysts have drew attention as its NIR light induced photocatalytic property for the conversion of solar light to chemical energy. Investigating the relationship between the surface chemistry and NIR light driven photocatalysis becomes the hotpot of research. In this review, the recent progress in the application of near‐infrared driven photocatalysis is highlighted. By summarizing the studies on the classification of photocatalysts and photocatalytic application, we highlight the relationship between surface chemistry and photocatalytic performance. It can be expected that the review will disclose the forefront accomplishments on the relationship between surface structure with NIR photon capture and simultaneously explore the challenges and opportunities on the development of novel and highly efficient NIR responsive photocatalysts for solar energy conversion.This article is protected by copyright. All rights reserved.

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Su, Qianqian, Han-Lin Wei, Yachong Liu, Chaohao Chen, Ming Guan, Shuai Wang, Yan Su, Haifang Wang, Zhigang Chen, and Dayong Jin. "Six-photon upconverted excitation energy lock-in for ultraviolet-C enhancement." Nature Communications 12, no. 1 (July 16, 2021). http://dx.doi.org/10.1038/s41467-021-24664-x.

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AbstractPhoton upconversion of near-infrared (NIR) irradiation into ultraviolet-C (UVC) emission offers many exciting opportunities for drug release in deep tissues, photodynamic therapy, solid-state lasing, energy storage, and photocatalysis. However, NIR-to-UVC upconversion remains a daunting challenge due to low quantum efficiency. Here, we report an unusual six-photon upconversion process in Gd3+/Tm3+-codoped nanoparticles following a heterogeneous core-multishell architecture. This design efficiently suppresses energy consumption induced by interior energy traps, maximizes cascade sensitizations of the NIR excitation, and promotes upconverted UVC emission from high-lying excited states. We realized the intense six-photon-upconverted UV emissions at 253 nm under 808 nm excitation. This work provides insight into mechanistic understanding of the upconversion process within the heterogeneous architecture, while offering exciting opportunities for developing nanoscale UVC emitters that can be remotely controlled through deep tissues upon NIR illumination.

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Noel, Laurent, Amine Khitous, Céline Molinaro, Hsiao‐Wen Zan, Dominique Berling, Fabien Grasset, and Olivier Soppera. "Laser Direct Writing of Crystallized TiO₂ by Photothermal Effect Induced by Gold Nanoparticles." Advanced Materials Technologies, November 30, 2023. http://dx.doi.org/10.1002/admt.202300407.

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AbstractNear‐infrared (NIR) laser annealing is successfully used to crystallize TiO2 thin films from a sol–gel solution deposited on gold nanoparticle arrays (AuNPs). The AuNPs are used as nano‐heaters allowing a local temperature increase up to 500 °C in the film. The temperature reached under the laser is deduced from the presence of the anatase phase in the samples obtained by laser exposure, showing that crystallized TiO2 can be obtained by the photothermal effect. Different analytical techniques supported this study, such as grazing X‐ray diffraction (GIXRD), UV–vis, and Raman spectroscopy. The temperature increase is confirmed by a numerical model that emphasizes the role of NPs coupling in the photothermal effect. Direct laser patterning by NIR laser and in combination with Deep‐UV photolithography (DUV) are demonstrated. This fabrication method opens new perspectives in applications such as photonics, photocatalysis, or biosensing.

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Zhong, Jun, Xiang Zheng, Yuan Wen, Yuewei Li, Jianting Zhang, Ranjith Kumar Kankala, Shibin Wang, and Aizheng Chen. "NIR-switchable Local Hydrogen Generation by Tandem Bimetallic MOFs Nanocomposites for Enhanced Chemodynamic Therapy." Regenerative Biomaterials, October 31, 2023. http://dx.doi.org/10.1093/rb/rbad097.

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Abstract The inadequate quantity of hydrogen peroxide (H2O2) in cancer cells promptly results in the constrained success of chemodynamic therapy (CDT). Significant efforts made throughout the years, nevertheless, researchers are still facing the great challenge of designing a CDT agent and securing H2O2 supply within the tumor cell. In this study, taking advantage of H2O2 level maintenance mechanism in cancer cells, a nanozyme-based bimetallic metal-organic frameworks (MOFs) tandem reactor is fabricated to elevate intracellular H2O2 levels, thereby enhancing CDT. In addition, under near-infrared excitation, the upconversion nanoparticles (UCNPs) loaded into the MOFs can perform photocatalysis and generate hydrogen, which increases cellular susceptibility to radicals induced from H2O2, inhibits cancer cell energy, causes DNA damages and induces tumor cell apoptosis, thus improving CDT therapeutic efficacy synergistically. The proposed nanozyme-based bimetallic MOFs-mediated CDT and UCNPs-mediated hydrogen therapy act as combined therapy with high efficacy and low toxicity.

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Shafiq, Kashuf, Muhammad Aadil, Warda Hassan, Qurshia Choudhry, Safia Gul, Afroz Rais, Alaa A. Fattah, Khaled H. Mahmoud, and Mohd Zahid Ansari. "Cobalt and holmium co-doped nickel ferrite nanoparticles: synthesis, characterization and photocatalytic application studies." Zeitschrift für Physikalische Chemie, August 23, 2023. http://dx.doi.org/10.1515/zpch-2023-0273.

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Abstract Herein, nickel ferrite-based photocatalysts with enhanced light utilizing electrical charge transport properties have been reported for environmental remediation applications. The cobalt and holmium co-doped nickel ferrite [Ni1−x (Co) x Fe2−y (Ho) y O4] nanoparticles and bare nickel ferrite (NiFe2O4) nanoparticles have been prepared via surfactant-supported wet-chemical techniques. The as-prepared ferritic photocatalyst’s structural, morphological, and light harvesting features have been examined in detail using well-known physical, electronic, and optical methods. The co-doped ferrite photocatalyst’s tuned structural features enable it to absorb maximum wavelengths from the U.V. and visible regions. This is because the co-doped Ni1−x (Co) x Fe2−y (Ho) y O4 optical band gap is 1.73 eV; hence, the wavelength from the visible part possesses sufficient energies to trigger the electronic excitation in co-doped ferrite photocatalysts. Moreover, the co-doping-induced structural defects in the ferrite photocatalyst. These defects act as a reservoir for the charge species, mainly electrons, so the process of charge recombination is almost hampered for the Ni1−x (Co) x Fe2−y (Ho) y O4 photocatalyst. In application terms, the photomineralization capabilities of doped and bare ferrite photocatalysts have been explored using crystal violet (CV) dye. The comparative photocatalytic evaluation of both nickel ferrite-based photocatalysts shows that co-doped ferrite degraded 96.02 % of CV dye. In comparison, the undoped one only degraded 64.84 % after 80 min of W-lamp light exposure. The results demonstrated that the Ho and Co co-doped ferrite photocatalyst exhibits excellent photocatalytic activity, suggesting its potential for environmental remediation applications in textile industrial discharges.

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Guo, Meijun, Amin Talebian‐Kiakalaieh, Bingquan Xia, Yiyang Hu, Hongjun Chen, Jingrun Ran, and Shi‐Zhang Qiao. "Cu₇S₄/M_xS_y (M=Cd, Ni, and Mn) Janus Atomic Junctions for Plasmonic Energy Upconversion Boosted Multi‐Functional Photocatalysis." Advanced Functional Materials, September 2023. http://dx.doi.org/10.1002/adfm.202304912.

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AbstractRational design/synthesis of atomic‐level‐engineered Janus junctions for sunlight‐impelled high‐performance photocatalytic generation of clean fuels (e.g., H2O2 and H2) and valuable chemicals are of great significance. Especially, it is appealing but challenging to acquire accurately‐engineered Janus atomic junctions (JAJs) for simultaneously realizing the plasmonic energy upconversion with near‐infrared (NIR) light and direct Z‐scheme charge transfer with visible light. Here, a range of new Cu7S4/MxSy (M=Cd, Ni, and Mn) JAJs are designed/synthesized via a cation‐exchange route using Cu7S4 hexagonal nanodisks as templates. All Cu7S4/MxSy JAJs show apparently‐enhanced photocatalytic H2O2 evolution compared to Cu7S4 in pure water. Notably, optimized Cu7S4/CdS (CCS) JAJ exhibits the outstanding H2O2 evolution rate (2.93 mmol g−1 h−1) in benzyl alcohol aqueous solution, due to the following factors: i) NIR light‐impelled plasmonic energy upconversion induced H2O2 evolution, revealed by ultrafast transient absorption spectroscopy; ii) visible‐light‐driven direct Z‐scheme charge migration, confirmed by in situ X‐ray photoelectron spectroscopy. Besides, three different reaction pathways for H2O2 evolution are disclosed by in situ electron spin resonance spectroscopy and quenching experiments. Finally, CCS JAJ also exhibits super‐high rates on H2 and benzaldehyde co‐generation using visible‐NIR light or NIR light. This work highlights the significance of atomic‐scale interface engineering for solar‐to‐chemical conversion.

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Sahana, Soumitra, Anupam Gautam, Rajveer Singh, and Shivani Chandel. "A recent update on development, synthesis methods, properties and application of natural products derived carbon dots." Natural Products and Bioprospecting 13, no. 1 (November 13, 2023). http://dx.doi.org/10.1007/s13659-023-00415-x.

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AbstractNatural resources are practically infinitely abundant in nature, which stimulates scientists to create new materials with inventive uses and minimal environmental impact. Due to the various benefits of natural carbon dots (NCDs) from them has received a lot of attention recently. Natural products-derived carbon dots have recently emerged as a highly promising class of nanomaterials, showcasing exceptional properties and eco-friendly nature, which make them appealing for diverse applications in various fields such as biomedical, environmental sensing and monitoring, energy storage and conversion, optoelectronics and photonics, agriculture, quantum computing, nanomedicine and cancer therapy. Characterization techniques such as Photoinduced electron transfer, Aggregation-Induced-Emission (AIE), Absorbance, Fluorescence in UV–Vis and NIR Regions play crucial roles in understanding the structural and optical properties of Carbon dots (CDs). The exceptional photoluminescence properties exhibited by CDs derived from natural products have paved the way for applications in tissue engineering, cancer treatment, bioimaging, sensing, drug delivery, photocatalysis, and promising remarkable advancements in these fields. In this review, we summarized the various synthesis methods, physical and optical properties, applications, challenges, future prospects of natural products-derived carbon dots etc. In this expanding sector, the difficulties and prospects for NCD-based materials research will also be explored.

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Zhang, Zijian, Li Wang, Weixu Liu, Zihe Yan, Yongfa Zhu, Shuyun Zhou, and Shanyue Guan. "Photogenerated-hole-induced rapid elimination of solid tumors by the supramolecular porphyrin photocatalyst." National Science Review, July 2, 2020. http://dx.doi.org/10.1093/nsr/nwaa155.

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Abstract The rapid, complete, targeted and safe treatment for tumors remains a key issue in cancer therapy. A novel treatment of solid tumors by supramolecular photocatalyst Nano-SA-TCPP with the irradiation of 600–700 nm wavelength is established. Solid tumors (100 mm3) can be eliminated within 10 min. The 50-day mouse survival rate was increased from 0% to 100% after the photocatalytic therapy. The breakthrough was owing to the cell membrane rupture and the cytoplasmic loss caused by photogenerated holes inside cancer cells. The porphyrin-based photocatalysts can be internalized in a targeted manner by cancer cells due to the size selection effect, without entering the normal cells. The therapy has no toxicity or side effects for normal cells and organisms. Moreover, the photocatalytic therapy is effective for a variety of cancer cell lines. Because of its high efficiency, safety and universality, the photocatalytic therapy provides us with a new lancet to conquer the tumor.

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Zhang, Qi, Ya Zhang, Hu Shi, Hongxia Zhang, Jianghong Zhao, Zhanfeng Zheng, Hengquan Yang, and Pengju Yang. "Dynamic aggregation of carbon dots self‐stabilizes symmetry breaking for exceptional hydrogen production with near‐infrared light." Aggregate, September 15, 2023. http://dx.doi.org/10.1002/agt2.424.

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AbstractDeveloping new photosystems that integrate broad‐band near‐infrared (NIR) light harvesting and efficient charge separation is a long‐sought goal in the photocatalytic community. In this work, we develop a novel photochemical strategy to prepare light‐active carbon dots (CDs) under room temperature and discover that the aggregation of CDs can broaden the light absorption to the NIR region due to the electronic couplings between neighboring CDs. Importantly, the dynamic non‐covalent interactions within CD aggregates can stabilize symmetry breaking and thus induce large dipole moments for charge separation and transfer. Furthermore, the weak non‐covalent interactions allow for flexible design of the aggregated degrees and the local electronic structures of CD aggregates, further strengthening NIR‐light harvesting and charge separation efficiency. As a result, the CD aggregates achieve a record apparent quantum yield of 13.5% at 800 nm, which is one of the best‐reported values for NIR‐light‐driven hydrogen photosynthesis to date. Moreover, we have prepared a series of different CDs and also observed that these CDs after aggregation all exhibit outstanding NIR‐responsive photocatalytic hydrogen production activity, suggesting the universality of aggregation‐enhanced photocatalysis. This discovery opens a new promising platform for using CD aggregates as efficient light absorbers for solar conversion.

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Thi Minh Hue, Do, Nguyen Thi Tuyet Mai, Tran Van Chau, Tran Thi Thu Huyen, Nguyen Thi Lan, Ta Ngoc Dung, and Huynh Dang Chinh. "Research Synthesis of La3+ Doped TiO2 Nanoparticles by Hydrothermal Method, Study on Photocatalytic Activity of Decomposition of Methylene Blue under Ultraviolet Irradiation." VNU Journal of Science: Natural Sciences and Technology 35, no. 3 (September 20, 2019). http://dx.doi.org/10.25073/2588-1140/vnunst.4899.

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In this study, with the aim of improving the photocatalytic efficiency of TiO2, we studied the synthesis of La3+ doped TiO2 (with doped rates 1%, 2.5%, 5% mol/mol compared to Ti4+) by hydrothermal method. The hydrothermal condition was set at 180 °C for 12 hours. Material characteristics were investigated by XRD, SEM and solid UV-Vis methods. The results show that, all prepared materials have a crystal particle size of about nano-meters, small and smooth (4.5¸6.5 nm). La3+ doped TiO2 samples had a shift towards longer wavelengths (l» 400¸500 nm) compared to non-doped TiO2 sample (l£ 380 nm). The band gap energy (Eg) of La3+ doped TiO2 samples was reduced to 3.04¸3.10 eV . The yield of MB degradation of La3+ doped TiO2 at 5% mol/mol reached the highest ~93% after 60 minutes under ultraviolet irradiation. Keywords Anatase TiO2, photocatalysis, La3+ doped TiO2, hydrothermal method, ultraviolet irradiation. References [1] D. Nassoko, Y. F. Li, H. Wang, J. L. Li, Y. Z. Li, Y. Yu, Nitrogen-doped TiO2 nanoparticles by using EDTA as nitrogen source and soft template: Simple preparation, mesoporous structure, and photocatalytic activity under visible light, Journal of Alloys and Compounds. 540 (2012) 228-235. https://doi.org/10.1016/j.jallcom.2012.06.085.[2] M. Khatamian, S. Hashemian, A. Yavari, M. Saket, Preparation of metal ion (Fe3+ and Ni2+) doped TiO2 nanoparticles supported on ZSM-5 zeolite and investigation of its photocatalytic activity, Materials Science and Engineering B. 177 (2012) 1623-1627. http://dx.doi.org/10.1016/ j.mseb.2012.08.015.[3] X. Zhang, Q. Liu, Visible-light-induced degradation of formaldehyde over titania photocatalyst co-doped with nitrogen and nickel, Applied surface Science. 254(15) (2008) 4780-4785. https://doi.org/10.1016/j.apsusc.2008.01.094.[4] Y. Wang, H. Cheng, L. Zhang, Y. Hao, J. Ma, B. Xu, W. Li, The preparation, characterization, photoelectrochemical and photocatalytic properties of lanthanide metal-ion-doped TiO2 nanoparticles, Journal of Molecular Catalysis A: Chemical. 151 (2000) 205-216. https://doi.org/10. 1016/s 1381-1169(99)00245-9[5] M. Meksi, G. Berhault, C. Guillard, H. Kochkar, Design of TiO2 nanorods and nanotubes doped with lanthanum and comparative kinetic study in the photodegradation of formic acid, Catalysis Communications. 61 (2015) 107-111. https://doi. org/ 10.1016/j.catcom.2014.12.020.[6] Q. Wang, S. Xu, F. Shen, Preparation and characterization of TiO2 photocatalysts co-doped with iron (III) and lanthanum for the degradation of organic pollutants, Applied Surface Science. 257 (2011) 7671-7677. https://doi.org/10.1016/j. apsusc.2011.03.157.[7] L. Elsellami, H. Lachheb, A. Houas, Synthesis, characterization and photocatalytic activity of Li, Cd-, and La-doped TiO2, Materials Science in Semiconductor Processing. 36 (2015) 103-114. https://doi.org/10.1016/j.mssp.2015.03.032.[8] J. Nie, Y. Mo, B. Zheng, H. Yuan, D. Xiao, Electrochemical fabrication of lanthanum-doped TiO2 nanotube array electrode and investigation of its photoelectrochemical capability, Electrochimica Acta. 90 (2013) 589-596. http://dx.doi.org/10. 1016/j.electacta. 2012.12.049.[9] Y. Chen, Q. Wu, C. Zhou, Q. Jin, Enhanced photocatalytic activity of La and N co-doped TiO2/diatomite composite, Powder Technology. 322 (2017) 296-300. http://dx.doi.org/10.1016/ j.powtec.2017.09.026. [10] I. Ganesh, P. P. Kumar, I. Annapoorna, J. M. Sumliner, M. Ramakrishna, N. Y. Hebalkar, G. Padmanabham, G. Sundararajan, Preparation and characterization of Cu-doped TiO2 materials for electrochemical, photoelectrochemical, and photocatalytic applications, Applied Surface Science, 293 (2014) 229-247. http://dx.doi.org/10. 1016/j.apsusc.2013.12.140.

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Gao, Yuying, Feng Cheng, Weina Fang, Xiaoguo Liu, Shengyang Wang, Wei Nie, Ruotian Chen, et al. "Probing of coupling effect induced plasmonic charge accumulation for water oxidation." National Science Review, July 6, 2020. http://dx.doi.org/10.1093/nsr/nwaa151.

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Abstract A key issue for redox reactions in plasmon-induced photocatalysis, particularly for water oxidation, is the concentration of surface-accumulating charges (electrons or holes) at a reaction site for artificial photosynthesis. However, where plasmonic charge accumulated at a catalyst's surface, and how to improve local charge density at active sites, remains unknown because it is difficult to identify the exact spatial location and local density of the plasmon-induced charge, particularly with regard to holes. Herein, we show that at the single particle level, plasmon-coupling-induced holes can be greatly accumulated at the plasmonic Au nanoparticle dimer/TiO2 interface in the nanogap region, as directly evidenced by the locally enhanced surface photovoltage. Such an accumulation of plasmonic holes can significantly accelerate the water oxidation reaction (multi-holes involved) at the interfacial reaction site, with nearly one order of magnitude enhancement in photocatalytic activities compared to those of highly dispersed Au nanoparticles on TiO2. Combining Kelvin probe force microscopy and theoretical simulation, we further clarified that the local accumulated hole density is proportional to the square of the local near-field enhancement. Our findings advance the understanding of how charges spatially distribute in plasmonic systems and the specific role that local charge density at reaction sites plays in plasmonic photocatalysis.

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Zhao, Bin, Lingting Zeng, Danyang Chen, Songqing Xie, Zhaokui Jin, Guanglin Li, Wei Tang, and Qianjun He. "NIR-photocatalytic regulation of arthritic synovial microenvironment." Science Advances 8, no. 40 (October 7, 2022). http://dx.doi.org/10.1126/sciadv.abq0959.

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Synovial microenvironment (SME) plays a vital role in the formation of synovial pannus and the induction of cartilage destruction in arthritis. In this work, a concept of the photocatalytic regulation of SME is proposed for arthritis treatment, and monodispersive hydrogen–doped titanium dioxide nanorods with a rutile single-crystal structure are developed by a full-solution method to achieve near infrared–photocatalytic generation of hydrogen molecules and simultaneous depletion of overexpressed lactic acid (LA) for realizing SME regulation in a collagen-induced mouse model of rheumatoid arthritis. Mechanistically, locally generated hydrogen molecules scavenge overexpressed reactive oxygen species to mediate the anti-inflammatory polarization of macrophages, while the simultaneous photocatalytic depletion of overexpressed LA inhibits the inflammatory/invasive phenotypes of synoviocytes and macrophages and ameliorates the abnormal proliferation of synoviocytes, thereby remarkably preventing the synovial pannus formation and cartilage destruction. The proposed catalysis-mediated SME regulation strategy will open a window to realize facile and efficient arthritis treatment.

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Rajagopal, Sanjeevan, Suresh Thangudu, June Yen Feng, Pavithra Sriram, Ta-Jen Yen, and Kuo Chu Hwang. "Hotspots on Action: Near-infrared Light Mediated Photo Electrochemical Oxygen Evolution on High Index Facet Plasmonic Gold Nano Architectures." Nanoscale, 2022. http://dx.doi.org/10.1039/d2nr02741k.

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Photo-induced electrochemical water splitting is a fascinating approach to overcome the present energy demands as well as environmental associated issues. To this end, near-infrared (NIR) photocatalysts stand as a promising...

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Ullah, Ikram, Cong Lin, Jing-Han Li, Xiao-Jie Lu, Zhengkun Yang, Gang Wang, and An-Wu Xu. "Metallic TiN Nanoparticles Loaded on g-C3N4 for Plasmon Enhanced Visible and NIR Photocatalytic H2 Evolution from Water Splitting." Inorganic Chemistry Frontiers, 2023. http://dx.doi.org/10.1039/d3qi00484h.

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Extending light absorption from visible to near-infrared (NIR) light regions and plasmon-induced hot electrons produced from the decay of surface plasmons of metallic nanoparticles are of significance in photocatalytic field....

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Wu, Zilong, and Cyrille Boyer. "Near‐Infrared Light‐Induced Reversible Deactivation Radical Polymerization: Expanding Frontiers in Photopolymerization." Advanced Science, September 26, 2023. http://dx.doi.org/10.1002/advs.202304942.

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AbstractPhotoinduced reversible deactivation radical polymerization (photo‐RDRP) or photoinduced controlled/living radical polymerization has emerged as a versatile and powerful technique for preparing functional and advanced polymer materials under mild conditions by harnessing light energy. While UV and visible light (λ = 400–700 nm) are extensively employed in photo‐RDRP, the utilization of near‐infrared (NIR) wavelengths (λ = 700–2500 nm) beyond the visible region remains relatively unexplored. NIR light possesses unique properties, including enhanced light penetration, reduced light scattering, and low biomolecule absorption, thereby providing opportunities for applying photo‐RDRP in the fields of manufacturing and medicine. This comprehensive review categorizes all known NIR light‐induced RDRP (NIR‐RDRP) systems into four mechanism‐based types: mediation by upconversion nanoparticles, mediation by photocatalysts, photothermal conversion, and two‐photon absorption. The distinct photoinitiation pathways associated with each mechanism are discussed. Furthermore, this review highlights the diverse applications of NIR‐RDRP reported to date, including 3D printing, polymer brush fabrication, drug delivery, nanoparticle synthesis, and hydrogel formation. By presenting these applications, the review underscores the exceptional capabilities of NIR‐RDRP and offers guidance for developing high‐performance and versatile photopolymerization systems. Exploiting the unique properties of NIR light unlocks new opportunities for synthesizing functional and advanced polymer materials.

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Nagaraj, G., R. A. Senthil, Rajender Boddula, and K. Ravichandaran. "A Facile Synthesis of Anatase Ni2+ Doped TiO2 Nanorods with Highly Improved Visible-Light Photocatalytic Performance." Current Analytical Chemistry 16 (January 8, 2020). http://dx.doi.org/10.2174/1573411016666200108143913.

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: Herein, we reported a simple and effective approach to synthesis of pure and Ni2+ doped TiO2 nanorods by a photon-induced method (PIM) followed by calcination at 850 ºC in air atmosphere. Basically, the PIM was used to tuning the properties of as-prepared TiO2 photocatalyst. These obtained samples were further characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HR-TEM) and UV-visible diffuse reflectance spectroscopy (UV-vis DRS) analysis. XRD results reveals that the both pure TiO2 and Ni doped TiO2 nanorods has anatase phase up to 850 ºC. The HR-TEM analysis indicates that doping Ni is favourable to the formation of rod-like TiO2 sample. Also, the observed photocatalytic results demonstrates that the Ni doped TiO2 can be achieved a complete degradation of methylene blue (MB) within 30 min under direct sunlight irradiation as compared to pure TiO2. Therefore, this work revealing the doped Ni has a good potential to modification of TiO2 with an excellent photocatalytic activity for water treatment applications.

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Zhang, Guoqiang, Wei Huang, Yangsen Xu, Yongliang Li, Chuanxin He, Xiangzhong Ren, Peixin Zhang, and Hongwei Mi. "Suppressing Defects‐Induced Non‐Radiative Recombination for Activating the Near‐Infrared Photoactivity of Red Polymeric Carbon Nitride." Advanced Functional Materials, September 13, 2023. http://dx.doi.org/10.1002/adfm.202305935.

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AbstractMany cases of light absorption modification exceeding 700 nm or near‐infrared (NIR) light are reported for capturing more than half of the solar energy, however, very few modifications can produce NIR photoactivity due to the inevitably introduced defects‐induced non‐radiative recombination. Here, taking four kinds of C/O co‐doped red polymeric carbon nitride as examples, defect‐repairing is carried out using alkali metal molten‐salts (LiCl/NaCl and LiCl/KCl) or solid‐salt (KCl) to activate their NIR photoactivity. The defect repair results from the passivation of alkali metal valence electron pairing and the formation of crystalline polyheptazine imide structure with more complete polymerization. More importantly, it sharply eliminates bulk defects (such as carbon vacancy and nitrogen vacancy) introduced by C/O co‐doping. Since structural defects are inevitably introduced in most photocatalysts during expanding light absorption, this proposed strategy is bound to be universal in suppressing defects‐induced non‐radiative recombination to activate NIR photoactivity.

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Dong, Shuqing, Yuqi Huang, Hanrong Yan, Huarong Tan, Liying Fan, Minghao Chao, Yiping Ren, et al. "Ternary heterostructure-driven photoinduced electron-hole separation enhanced oxidative stress for triple-negative breast cancer therapy." Journal of Nanobiotechnology 22, no. 1 (May 12, 2024). http://dx.doi.org/10.1186/s12951-024-02530-4.

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AbstractZinc oxide nanoparticles (ZnO NPs) stand as among the most significant metal oxide nanoparticles in trigger the formation of reactive oxygen species (ROS) and induce apoptosis. Nevertheless, the utilization of ZnO NPs has been limited by the shallowness of short-wavelength light and the constrained production of ROS. To overcome these limitations, a strategy involves achieving a red shift towards the near-infrared (NIR) light spectrum, promoting the separation and restraining the recombination of electron-hole (e−-h+) pairs. Herein, the hybrid plasmonic system Au@ZnO (AZ) with graphene quantum dots (GQDs) doping (AZG) nano heterostructures is rationally designed for optimal NIR-driven cancer treatment. Significantly, a multifold increase in ROS generation can be achieved through the following creative initiatives: (i) plasmonic Au nanorods expands the photocatalytic capabilities of AZG into the NIR domain, offering a foundation for NIR-induced ROS generation for clinical utilization; (ii) elaborate design of mesoporous core-shell AZ structures facilitates the redistribution of electron-hole pairs; (iii) the incorporation GQDs in mesoporous structure could efficiently restrain the recombination of the e−-h+ pairs; (iv) Modification of hyaluronic acid (HA) can enhance CD44 receptor mediated targeted triple-negative breast cancer (TNBC). In addition, the introduced Au NRs present as catalysts for enhancing photothermal therapy (PTT), effectively inducing apoptosis in tumor cells. The resulting HA-modified AZG (AZGH) exhibits efficient hot electron injection and e−-h+ separation, affording unparalleled convenience for ROS production and enabling NIR-induced PDT for the cancer treanment. As a result, our well-designed mesoporous core-shell AZGH hybrid as photosensitizers can exhibit excellent PDT efficacy.

Journal articles on the topic 'NIR induced photocatalysis'

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