Bibliografie tematiche / NIR induced photocatalysis

Letteratura scientifica selezionata sul tema "NIR induced photocatalysis"

Autore: Grafiati

Pubblicato: 1 giugno 2024

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Articoli di riviste sul tema "NIR induced photocatalysis":

Zhang, Kailian, Jie Guan, Ping Mu, Kai Yang, Yu Xie, Xiaoxiao Li, Laixi Zou, Weiya Huang, Changlin Yu e Wenxin Dai. "Visible and near-infrared driven Yb3+/Tm3+ co-doped InVO4 nanosheets for highly efficient photocatalytic applications". Dalton Transactions 49, n. 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.

Zhaoyu, Ma, e Junying Zhang. "The Localized Surface Plasmon Resonances (LSPR) Origin of W₁₈O₄₉ and Application in Photocatalysis". ECS Meeting Abstracts MA2023-02, n. 47 (22 dicembre 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.

Li, Yongjin, Lu Yao, Zhaoyi Yin, Zhiyuan Cheng, Shenghong Yang e 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, n. 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 e Lisha Zhang. "Synthesis of Cu2(OH)PO4 superstructures with NIR-laser enhanced photocatalytic activity". Functional Materials Letters 13, n. 03 (26 febbraio 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.

Chen, Xianjie, Yuan Xu, Xinguo Ma e 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, n. 3 (2 dicembre 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.

Contreras, Enrique, Christian Palacios, I. Becerril-Castro e José Romo-Herrera. "Plasmon Induced Photocatalysts for Light-Driven Nanomotors". Micromachines 12, n. 5 (19 maggio 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.

Su, Yuning, Guoqiang Tan, Chi Xu, Ting Liu, Ying Wang, Huijun Ren e Ao Xia. "The up-conversion effect induced NIR-photocatalytic performance of Bi2−XErXWO6 photocatalysts". Materials Letters 211 (gennaio 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, n. 47 (22 dicembre 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.

Yu, Yanlong, Jun Zhang, Yi Lin, Dandan Zhao, Ziying Li e Sai Yan. "Facile Synthesis of Ni3+/Co3+ Ion-Doped Zn2SnO4 Microspheres toward Efficient Photocatalytic CO2 Reduction". Applied Sciences 13, n. 24 (12 dicembre 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).

Xia, Xinyuan, Ning Deng, Guanwei Cui, Junfeng Xie, Xifeng Shi, Yingqiang Zhao, Qian Wang, Wen Wang e Bo Tang. "NIR light induced H2evolution by a metal-free photocatalyst". Chemical Communications 51, n. 54 (2015): 10899–902. http://dx.doi.org/10.1039/c5cc02589c.

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Più fonti

Tesi sul tema "NIR induced photocatalysis":

Purohit, Bhagyesh. "Precursors-guided synthesis of upconverting nanomaterials for near-infrared driven photocatalysis". Electronic Thesis or Diss., Lyon, 2021. https://n2t.net/ark:/47881/m6sn08q4.

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L'utilisation de l'énergie solaire pour résoudre des problèmes environnementaux tels que la détoxification de l'eau, la purification de l'air et la production d'hydrogène a suscité un grand intérêt de la part de la communauté scientifique au cours des deux dernières décennies. La photocatalyse solaire est une piste intéressante pour cibler toutes ces questions environnementales. Actuellement, les technologies ne permettent pas encore d'utiliser efficacement une partie importante du spectre solaire, à savoir l'infrarouge, qui correspond à près de ~48 % du spectre solaire total. Cette thèse vise à préparer des matériaux nanocomposites qui utilisent ces photons solaires à faible énergie en les convertissant en photons UV et visibles à haute énergie et en les utilisant ensuite pour la photocatalyse classique. Pour y parvenir, l'accent a été mis sur deux aspects majeurs de la préparation de ce photocatalyseur modifié. Premièrement, la synthèse de matériaux qui pourraient convertir efficacement les photons actuellement inutilisés et deuxièmement, la préparation de leur composite avec TiO2, le photocatalyseur le plus largement utilisé. Cette thèse de doctorat se concentre sur une approche basée sur l’ « upconversion » afin d’étendre la gamme d'utilisation du spectre solaire. Pour atteindre cet objectif, deux stratégies d’optimisation ont été abordée. L’'optimisation du rendement quantique des nanoparticules à upconversion en utilisant de nouveaux précurseurs anhydres et, la préparation de photo-catalyseur nanocomposite UCNPs-TiO2 en utilisant des métallogels et/ou des structures coeur-coquille. Pour finir nous testons l’objectif de l'utilisation des photons solaires infrarouges à faible énergie en réalisant une photocatalyse sous irradiation IR uniquement en utilisant la plate-forme développée dans ce travail
The utilization of solar energy to solve environmental problems such as water detoxification, air purification and hydrogen production has attracted great interest from the scientific community over the last two decades. Solar photocatalysis is an interesting avenue to target all these environmental issues. Currently, technologies do not yet allow for the efficient use of a significant portion of the solar spectrum, namely the infrared, which corresponds to nearly ~48% of the total solar spectrum. This thesis aims at preparing nanocomposite materials that use these low energy solar photons by converting them into high energy UV and visible photons and then using them for classical photocatalysis. To achieve this, two major aspects of the preparation of this modified photocatalyst were emphasized. Firstly, the synthesis of materials that could efficiently convert currently unused photons and secondly, the preparation of their composite with TiO2, the most widely used photocatalyst.This doctoral thesis focuses on an approach based on "upconversion" in order to extend the range of use of the solar spectrum. To achieve this goal, two optimization strategies were addressed. The optimization of the quantum efficiency of upconversion nanoparticles (UCNPs) using new anhydrous precursors and, the preparation of UCNPs-TiO2 nanocatalyst using metallogels and/or core-shell structures. Finally, we test the objective of using low energy infrared solar photons by performing photocatalysis under IR irradiation only using the platform developed in this work

Capitoli di libri sul tema "NIR induced photocatalysis":

Mohammed, Mohammed, e Rozyanty Rahman. "Utilizing Photocatalysts in Reducing Moisture Absorption in Composites of Natural Fibers". In Photocatalysts - New Perspectives [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.106543.

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Due to growing environmental consciousness and the depletion of oil supplies, numerous efforts have been made to replace synthetic fibers in fiber-reinforced composites with natural fibers (NFr). The low cost and abundance of NFr and its biodegradability and low density have encouraged researchers worldwide to study their potential applications in several industrial sectors. However, NFr has several disadvantages: excessive moisture absorption and subsequent swelling and degradation, low chemical and fire resistance, and insufficient interfacial interactions with polymers. Consequently, there is great interest in modifying the surface of NFr using a variety of methods. This chapter presents an overview of the NFr, its characterization, the problems associated with adding NFr to polymer composites. This literature survey suggests an in-depth review of photocatalysis by utilizing photocatalysts nanoparticle (PHNPs) aimed at increasing the hydrophobicity and interfacial bonding between the NFr and the matrix Using a photo-induced oxidation mechanism to disassemble water molecules, pollutants, and bacteria in a wet environment. Additionally, we reviewed the effects of these PHNPs on the moisture absorption, mechanical characteristics, and dimensional stability of NFr composites. As a result, this review article may make a valuable contribution to researchers interested in coating and treating NFr to further enhance their surface characteristics.

Atti di convegni sul tema "NIR induced photocatalysis":

Gondal, M. A., M. A. Dastageer e A. Khalil. "Nano-NiO as a photocatalyst in antimicrobial activity of infected water using laser induced photo-catalysis". In 2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC). IEEE, 2011. http://dx.doi.org/10.1109/siecpc.2011.5876969.

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