Segui questo link per vedere altri tipi di pubblicazioni sul tema: Heterostructured photocatalyst.

Articoli di riviste sul tema "Heterostructured photocatalyst"

Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili

Scegli il tipo di fonte:

Vedi i top-50 articoli di riviste per l'attività di ricerca sul tema "Heterostructured photocatalyst".

Accanto a ogni fonte nell'elenco di riferimenti c'è un pulsante "Aggiungi alla bibliografia". Premilo e genereremo automaticamente la citazione bibliografica dell'opera scelta nello stile citazionale di cui hai bisogno: APA, MLA, Harvard, Chicago, Vancouver ecc.

Puoi anche scaricare il testo completo della pubblicazione scientifica nel formato .pdf e leggere online l'abstract (il sommario) dell'opera se è presente nei metadati.

Vedi gli articoli di riviste di molte aree scientifiche e compila una bibliografia corretta.

1

Baylan, Elif, Hasan Akyildiz e Ozlem Yildirim. "Stable CuCrO2 nanoparticles - ZnO fibres p-n heterostructure system for effective photocatalytic activity". Processing and Application of Ceramics 13, n. 2 (2019): 189–201. http://dx.doi.org/10.2298/pac1902189b.

Testo completo
Abstract (sommario):
Heterostructured photocatalysts were fabricated by coupling electrospun n-type ZnO fibres and hydrothermally derived p-type CuCrO2 nanoparticles. The effect of the amount of CuCrO2 nanoparticles on the photocatalytic activity of the heterostructured photocatalyst was systematically investigated. The formation of the heterojunctions between the two semiconductors was revealed via detailed XRD, XPS, TEM and optical property measurements. The experimental results indicated that the optimal CuCrO2 amount in the composite photocatalyst was 1.0wt.% due to the optimum doping and surface coverage, higher absorption onset edge, larger absorption intensity and optimum band gap energy. This composite photocatalyst, fabricated by drop casting of CuCrO2 nanoparticle dispersion on ZnO fibres, displayed 30% higher rate constant (k) value compared to the pure ZnO fibres in the degradation of methylene blue dye molecules and reached 93.4% decomposition in 1 h under UV-visible light exposure. The obtained results are highly encouraging in comparison to only UV/light active p-n heterostructured photocatalysts previously reported in literature. Therefore, we believe that the proposed approach here opened the way for simple synthesis of highly-efficient visible light active heterostructured semiconductor photocatalyst systems.
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Zhang, Caomeng, Shijie Zhong, Qun Li, Yuanpeng Ji, Liwei Dong, Guisheng Zhang, Yuanpeng Liu e Weidong He. "Heterostructured Nanoscale Photocatalysts via Colloidal Chemistry for Pollutant Degradation". Crystals 12, n. 6 (31 maggio 2022): 790. http://dx.doi.org/10.3390/cryst12060790.

Testo completo
Abstract (sommario):
With the further acceleration in the industrialization process, organic pollutants and gas pollution in the environment have posed severe threats to human health. It has been a global challenge regarding achieving an efficient solution to pollutant degradation. In such a context, photocatalysts have attracted researchers’ attention for their simplicity, efficiency, cleanliness and low cost. However, the single photocatalyst is facing a research bottleneck owing to its narrow light absorption spectrum and high photocarrier recombination rate. Given that heterojunctions can achieve efficient separation of photogenerated carriers in space, constructing heterostructured photocatalysts has become the most perspective method to improve the performance of photocatalysts. Furthermore, nanoparticles prepared through colloidal chemistry have the characteristics of high dispersion, stability and adsorption, further enhancing the degradation efficiency of heterostructured photocatalysts. This article reviews the primary methods for preparing heterostructured photocatalysts through colloidal chemistry, classifies the heterojunction types by transport routes of photogenerated carriers and summarizes the recent progress of heterostructured photocatalysts in pollutant degradation. To implement environmental remediation, it is crucial to explore economical and efficient photocatalysts for practical applications. It is hoped that this review will stimulate further exploration of colloidal heterostructured photocatalysts for pollutant degradation.
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Liu, Jianjun, Yingchun Yu, Zhixin Liu, Shengli Zuo e Baoshan Li. "AgBr-Coupled TiO2: A Visible Heterostructured Photocatalyst for Degrading Dye Pollutants". International Journal of Photoenergy 2012 (2012): 1–7. http://dx.doi.org/10.1155/2012/254201.

Testo completo
Abstract (sommario):
A series of AgBr/TiO2visible photocatalysts with heterojunction structure was synthesized using Ti(OC4H9)4, KBr, and AgNO3as precursors. The phase composition, particle morphology and size, microstructures, and absorbance of these photocatalysts were characterized by X-ray diffraction, transmission electron microscope (TEM), high-resolution TEM, and UV-vis spectra. It was found that the coupled AgBr/TiO2was an effective photocatalyst to degrade the methylene blue under visible light irradiation, compared with the other noncoupled photocatalysts of AgBr, AgBr/P25, and P25. The photocatalytic activities of AgBr/TiO2increase first and then decrease with increasing the mass ratio ofmAgNO3/mTiO2and the photocatalyst with the mass ratio of 3.35 has the highest photocatalytic activity. The results showed that the coupled photocatalyst has the particle size of about 15 nm with homogeneous dispersion and has the strongest absorption in whole UV-vis light region (250∼800 nm) originated from the synergetic effect of heterostructured AgBr/TiO2. The coupled AgBr/TiO2photocatalyst can keep stable photocatalytic activity after five-circle runs.
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Wei, Xueyu, Saraschandra Naraginti, Pengli Chen, Jiyuan Li, Xiaofan Yang e Buwei Li. "Visible Light-Driven Photocatalytic Degradation of Tetracycline Using p-n Heterostructured Cr2O3/ZrO2 Nanocomposite". Water 15, n. 20 (23 ottobre 2023): 3702. http://dx.doi.org/10.3390/w15203702.

Testo completo
Abstract (sommario):
Antibiotic pollution beyond the safety limits poses a significant threat to the environmental sustainability and human health which necessitates the development of efficient methods for reducing antibiotics in pharmaceutical wastewater. Photocatalysis is a proven technology which has drawn considerable attention in semiconductor photocatalysts. Our study aims to develop a highly efficient Cr2O3/ZrO2 photocatalyst for the degradation of tetracycline (TCL) under visible light. The synthesized catalyst was well characterized by XRD, HR-TEM-SAED, XPS, FT-IR, BET and UV-Vis-DRS methods. The effects of various parameters on photocatalytic degradation were evaluated in detail, showing that 97.1% of 50 mgL−1 tetracycline concentrations could be degraded within 120 min at pH 5 with a 0.1 gL−1 photocatalyst-loading concentration under visible light (300 W Xe lamp). The uniform distribution of spherical ZrO2 nanoparticles on the surface of the Cr2O3 nano-cubes efficiently reduced the recombination rate with an energy bandgap of 2.75 eV, which provided a faster photodegradation of tetracycline under visible light. In addition, a plausible degradation pathway and photoproducts generated during the photocatalytic degradation of TCL are proposed based on the LC-ESI/MS results, which suggested that efficient photodegradation was achieved during the visible light irradiation. Thus, our study reveals that the cost-effective Cr2O3-based photocatalyst with multi-reusability and efficient energy consumption could be an efficient photocatalyst for the rapid degradation of TCL during the wastewater treatment process.
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Ren, LiZhen, DongEn Zhang, Xiao Yun Hao, Xin Xiao, Jun Yan Gong, Ming Yan Wang e ZhiWei Tong. "Synthesis and photocatalytic performance of Bi2S3/SnS2 heterojunction". Functional Materials Letters 10, n. 02 (aprile 2017): 1750004. http://dx.doi.org/10.1142/s1793604717500047.

Testo completo
Abstract (sommario):
Bi2S3/SnS2 heterostructured photocatalysts were synthesized from BiOI, SnCl[Formula: see text]5H2O and NH2CSNH2 using an economic and simple hydrothermal method. The as-synthesized samples were characterized by X-ray diffraction, scanning electron microscopy and ultraviolet-visible diffuse reflectance spectroscopy. The photodegradation activities of the Bi2S3/SnS2 heterostructured photocatalysts were estimated by degrading rhodamine B under simulated sunlight supplied by irradiating with a 350[Formula: see text]W Xe lamp. Bi2S3/SnS2 photocatalysts were prepared using varying percentages of Bi2S3. The sample containing 13% Bi2S3 had the most efficient photocatalyst performance among the tested samples. The photocatalytic mechanism involves heterojunctions formed in the Bi2S3/SnS2, which promoted effective separation of photoinduced electrons and holes.
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Tsay, Chien-Yie, Ching-Yu Chung, Chi-Jung Chang, Yu-Cheng Chang, Chin-Yi Chen e Shu-Yii Wu. "Fe-Doped g-C3N4/Bi2MoO6 Heterostructured Composition with Improved Visible Photocatalytic Activity for Rhodamine B Degradation". Molecules 29, n. 11 (3 giugno 2024): 2631. http://dx.doi.org/10.3390/molecules29112631.

Testo completo
Abstract (sommario):
The binary heterostructured semiconducting visible light photocatalyst of the iron-doped graphitic carbon nitride/bismuth molybdate (Fe-g-C3N4/Bi2MoO6) composite was prepared by coupling with Fe-doped g-C3N4 and Bi2MoO6 particles. In the present study, a comparison of structural characteristics, optical properties, and photocatalytic degradation efficiency and activity between Fe-doped g-C3N4 particles, Bi2MoO6 particles, and Fe-g-C3N4/Bi2MoO6 composite was investigated. The results of X-ray diffraction (XRD) examination indicate that the hydrothermal Bi2MoO6 particles have a single orthorhombic phase and Fourier transform infrared (FTIR) spectroscopy analysis confirms the formation of Fe-doped g-C3N4. The optical bandgaps of the Fe-doped g-C3N4 and Bi2MoO6 particles are 2.74 and 2.73 eV, respectively, as estimated from the Taut plots obtained from UV-Vis diffuse reflectance spectroscopy (DRS) spectra. This characteristic indicates that the two semiconductor materials are suitable for absorbing visible light. The transmission electron microscopy (TEM) micrograph reveals the formation of the heterojunction Fe-g-C3N4/Bi2MoO6 composite. The results of photocatalytic degradation revealed that the developed Fe-g-C3N4/Bi2MoO6 composite photocatalyst exhibited significantly better photodegradation performance than the other two single semiconductor photocatalysts. This property can be attributed to the heterostructured nanostructure, which could effectively prevent the recombination of photogenerated carriers (electron–hole pairs) and enhance photocatalytic activity. Furthermore, cycling test showed that the Fe-g-C3N4/Bi2MoO6 heterostructured photocatalyst exhibited good reproducibility and stability for organic dye photodegradation.
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Tigabu Bekele, Mekonnen. "Photocatalytic degradation of organic pollutants in the presence of selected transition metal nanoparticles: review". Journal of Plant Science and Phytopathology 6, n. 3 (29 settembre 2022): 115–25. http://dx.doi.org/10.29328/journal.jpsp.1001084.

Testo completo
Abstract (sommario):
Photocatalysis has attracted a lot of attention in recent years due to its potential in solving energy and environmental issues. Efficient light absorption and charge separation are two of the key factors for the exploration of high-performance photocatalytic systems, which are generally difficult to obtain from a single photocatalyst. The combination of various materials to form heterojunctions provides an effective way to better harvest solar energy and facilitate charge separation and transfer, thus enhancing photocatalytic activity and stability. This review concisely summarizes the recent development of visible light responsive heterojunctions, including the preparation and performance of semiconductor/semiconductor junctions and semiconductor/metal junctions and their mechanism for enhancing light harvesting and charge separation/transfer. In this regard, this review presents some unitary, binary and ternary CeO2 photocatalysts used for the degradation of organic pollutants. We expect this review to provide the type of guidelines for readers to gain a clear picture of nanotechnology and the fabrication and application of different types of heterostructured photocatalysts.
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Mrad, Maroua, Bilel Chouchene, Tahar Ben Chaabane, Thomas Gries, Ghouti Medjahdi, Lavinia Balan e Raphaël Schneider. "Heterostructured Photocatalysts Associating ZnO Nanorods and Ag-In-Zn-S Quantum Dots for the Visible Light-Driven Photocatalytic Degradation of the Acid Orange 7 Dye". Catalysts 12, n. 12 (6 dicembre 2022): 1585. http://dx.doi.org/10.3390/catal12121585.

Testo completo
Abstract (sommario):
Heterostructured photocatalysts associating ZnO nanorods (NRs) sensitized by quaternary Ag-In-Zn-S (AIZS) quantum dots (QDs) were prepared by depositing AIZS QDs at the surface of ZnO NRs followed by thermal treatment at 300 °C. The ZnO/AIZS catalysts were characterized by X-ray diffraction, electron microscopy, UV-vis diffuse spectroscopy and by photoelectrochemical measurements. Their photocatalytic activity was evaluated for the bleaching of the Acid Orange 7 (AO7) dye under visible light irradiation. Results show that the association of ZnO NRs with 10 wt% AIZS QDs affords the photocatalyst the highest activity due to the enhanced visible light absorption combined with the improved charge separation. The ZnO/AIZS(10) photocatalyst degrades 98% AO7 in 90 min under visible light illumination, while ZnO NRs can only decompose 11% of the dye. The ZnO/AIZS(10) photocatalyst was also found to be stable and can be reused up to eight times without significant alteration of its activity. This work demonstrates the high potential of AIZS QDs for the development of visible light active photocatalysts.
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Chowdhury, Arpita Paul, K. S. Anantharaju, K. Keshavamurthy e Samuel Lalthazuala Rokhum. "Recent Advances in Efficient Photocatalytic Degradation Approaches for Azo Dyes". Journal of Chemistry 2023 (26 dicembre 2023): 1–24. http://dx.doi.org/10.1155/2023/9780955.

Testo completo
Abstract (sommario):
In recent decades, the textile industry has contributed to continuous pollution in the environment. Synthetic dyes which are commonly found in waste water are azo, sulfur, anthraquinone, triphenylmethyl, indigoid, and phthalocyanine derivatives. These pollutants block the light penetration in water bodies and prevent photosynthesis activity, thereby affecting aquatic life. As an environmental crisis, several technologies have been explored to control pollution. Among all the techniques, the photocatalysis process is considered as a green, simple, and economical process. To improve the photocatalytic activity, researchers worldwide have investigated various photocatalysts such as metal oxides, metal ferrites, and heterostructured nanocomposites. The major goal of this review article is to propose a high-performing, cost-effective hybrid photocatalyst reported to date for prospective azo dye pollutant remediation. This review article also aimed to highlight the challenges and uncertainties associated with dye degradation in the photocatalytic process.
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Zhou, Tong-Tong, Feng-He Zhao, Yu-Qian Cui, Li-Xiang Chen, Jia-Shu Yan, Xiao-Xiong Wang e Yun-Ze Long. "Flexible TiO2/PVDF/g-C3N4 Nanocomposite with Excellent Light Photocatalytic Performance". Polymers 12, n. 1 (31 dicembre 2019): 55. http://dx.doi.org/10.3390/polym12010055.

Testo completo
Abstract (sommario):
As the world faces water shortage and pollution crises, the development of novel visible light photocatalysts to purify water resources is urgently needed. Over the past decades, most of the reported photocatalysts have been in powder or granular forms, creating separation and recycling difficulties. To overcome these challenges, a flexible and recyclable heterostructured TiO2/polyvinylidene fluoride/graphitic carbon nitride (TiO2/PVDF/g-C3N4) composite was developed by combining electrospinning, sintering and hydrothermal methods. In the composite, PVDF was used as a support template for removing and separating the photocatalyst from solution. Compared with pure TiO2, the TiO2/PVDF/g-C3N4 composite exhibited the extended light capture range of TiO2 into the visible light region. The photogenerated carriers were efficiently transferred and separated at the contact interface between TiO2 and g-C3N4 under visible light irradiation, which consequently increased the photocatalytic activity of the photocatalyst. In addition, the flexible composites exhibited excellent self-cleaning properties, and the dye on the photocatalysts was completely degraded by the as-prepared materials. Based on the intrinsic low cost, recyclability, absorption of visible light, facile synthesis, self-cleaning properties and good photocatalytic performances of the composite, the photocatalyst is expected to be used for water treatment.
Gli stili APA, Harvard, Vancouver, ISO e altri
11

Bai, Yuxin, Shasha Xu, Jing Chen, Xun Sun, Shan Zhao, Jingcai Chang e Zuoli He. "Ti3C2@g-C3N4/TiO2 Ternary Heterogeneous Photocatalyst for Promoted Photocatalytic Degradation Activities". Coatings 13, n. 3 (20 marzo 2023): 655. http://dx.doi.org/10.3390/coatings13030655.

Testo completo
Abstract (sommario):
Ternary heterojunction photocatalysts can improve the transport and separation of photogenerated electrons and holes, which could promote their reduction and oxidation properties for environmental and energy applications. In this research, the ternary photocatalyst Ti3C2@TiO2/g-C3N4 was successfully synthesized via direct electrostatic self-assembly during hydrothermal process. Ti3C2 MXene was used to optimize the interfacial carrier transport and separation between the interfaces. The obtained ternary heterostructured photocatalyst had a higher photocatalytic degradation performance for removing rhodamine B (RhB) and 4-chlorophenol (4-CP). The synergistic effect of heterojunction between g-C3N4 and TiO2 and Schottky barrier presented among TiO2 and Ti3C2 suppressed the recombination of the photogenerated electron–hole pairs. Moreover, the Ti3C2 can serve as an active site for the adsorption and activation of organic pollutants resulting from sufficient functional groups (F− here).
Gli stili APA, Harvard, Vancouver, ISO e altri
12

Tigabu Bekele, Mekonnen. "An overview of the developments of nanotechnology and heterogeneous photocatalysis in the presence of metal nanoparticles". Journal of Plant Science and Phytopathology 6, n. 3 (20 settembre 2022): 103–14. http://dx.doi.org/10.29328/journal.jpsp.1001083.

Testo completo
Abstract (sommario):
In general, nanotechnology can be understood as a technology of design, fabrication and applications of nanostructures and nanomaterials, as well as a fundamental understanding of the physical properties and phenomena of nanomaterials and nanostructures. In recent years the development of industries like textile, leather, paint, food, plastics, and cosmetics is enlarged and these industries are connected with the discarding of a vast number of organic pollutants which are harmful to microbes, aquatic systems, and human health by influencing the different parameters. So the fabrication of those nanomaterials (coupled or doped) to form heterojunctions provides an effective way to better harvest solar energy and facilitate charge separation and transfer, thus enhancing the photocatalytic activity and stability. We expect this review to provide a guideline for readers to gain a clear picture of the fabrication and application of different types of heterostructured photocatalysts. In this review, starting from the photocatalytic reaction mechanism and the preparation of the photocatalyst, we review the classification of current photocatalysts, preparation methods, a factor that affects photocatalytic reaction, characterization of photocatalysts, and the methods for improving photocatalytic performance. This review also aims to provide basic and comprehensive information on the industrialization of photocatalysis technology.
Gli stili APA, Harvard, Vancouver, ISO e altri
13

Zhang, Hui, Feng Liu, Zhigang Mou, Xiaofeng Liu, Jianhua Sun e Weiwei Lei. "A facile one-step synthesis of ZnO quantum dots modified poly(triazine imide) nanosheets for enhanced hydrogen evolution under visible light". Chemical Communications 52, n. 88 (2016): 13020–23. http://dx.doi.org/10.1039/c6cc06970c.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
14

Kumar, Pawan, Arvind Kumar, Chetan Joshi, Raghuvir Singh, Sandeep Saran e Suman L. Jain. "Heterostructured nanocomposite tin phthalocyanine@mesoporous ceria (SnPc@CeO2) for photoreduction of CO2 in visible light". RSC Advances 5, n. 53 (2015): 42414–21. http://dx.doi.org/10.1039/c5ra06449j.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
15

Guo, Xingkui, Fan Yang, Xiaolu Sun, Chuang Han, Yujiao Bai, Guanjun Liu, Wenbo Liu e Rongguo Wang. "Fabrication of a novel separation-free heterostructured photocatalyst with enhanced visible light activity in photocatalytic degradation of antibiotics". Journal of Materials Chemistry A 10, n. 6 (2022): 3146–58. http://dx.doi.org/10.1039/d1ta09757a.

Testo completo
Abstract (sommario):
A novel separation-free poly(N,N′-dimethylacrylamide)–titanium dioxide/copper sulfide (PDMAA–TiO2/CuS) hydrogel photocatalyst with the synergistic effect of adsorption and photocatalysis has been successfully developed by a facile two-step method.
Gli stili APA, Harvard, Vancouver, ISO e altri
16

Xu, You, Wenguang Tu, Shengming Yin, Markus Kraft, Qichun Zhang e Rong Xu. "Self-template synthesis of CdS/NiSx heterostructured nanohybrids for efficient photocatalytic hydrogen evolution". Dalton Transactions 46, n. 32 (2017): 10650–56. http://dx.doi.org/10.1039/c7dt00842b.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
17

Wang, Bin, Peng Li, Hanjing Hao, Huijie He, Hairui Cai, Fanfan Shang, Bei An, Xiaoqian Li e Shengchun Yang. "The Construction of Phosphorus-Doped g-C3N4/Rh-Doped SrTiO3 with Type-II Band Alignment for Efficient Photocatalytic Hydrogen Evolution". Nanomaterials 12, n. 24 (12 dicembre 2022): 4428. http://dx.doi.org/10.3390/nano12244428.

Testo completo
Abstract (sommario):
It is of great importance to promote charge separation in photocatalysts for enhanced photocatalytic activity under visible light irradiation. In this work, a type-II heterostructured photocatalyst was constructed by compositing phosphorus-doped g-C3N4 (P-CN) and Rh-doped SrTiO3 (Rh-STO) via a thermal calcination treatment. A series of characterizations were conducted to investigate the structure of heterostructured P-CN/Rh-STO. It was found that Rh-STO interacted with in situ generated P atoms from the decomposition of P-CN during the calcination process, thus leading to the formation of heterojunction of P-CN/Rh-STO. Compared with the single component, i.e., P-CN or Rh-STO, the obtained P-CN/Rh-STO showed superior photocatalytic activity to that of both P-CN and Rh-STO due to the effective charge separation across the heterojunction between P-CN and Rh-STO.
Gli stili APA, Harvard, Vancouver, ISO e altri
18

Xu, Yuyan, Zhongkai Xie, Rui Yu, Min Chen e Deli Jiang. "Co(OH)2 water oxidation cocatalyst-decorated CdS nanowires for enhanced photocatalytic CO2 reduction performance". Dalton Transactions 50, n. 29 (2021): 10159–67. http://dx.doi.org/10.1039/d1dt01082d.

Testo completo
Abstract (sommario):
A Co(OH)2 nanoparticle decorated CdS nanowire (Co(OH)2/CdS) based heterostructured photocatalyst was prepared. The optimal Co(OH)2/CdS photocatalyst achieves a CO production rate of 8.11 μmol g−1 h−1 under visible light irradiation (λ > 420 nm).
Gli stili APA, Harvard, Vancouver, ISO e altri
19

Li, Weijia, Zhaoyong Lin e Guowei Yang. "A 2D self-assembled MoS2/ZnIn2S4 heterostructure for efficient photocatalytic hydrogen evolution". Nanoscale 9, n. 46 (2017): 18290–98. http://dx.doi.org/10.1039/c7nr06755k.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
20

Teng, Daoguang, Jie Qu, Peng Li, Peng Jin, Jie Zhang, Ying Zhang e Yijun Cao. "Heterostructured α-Bi2O3/BiOCl Nanosheet for Photocatalytic Applications". Nanomaterials 12, n. 20 (16 ottobre 2022): 3631. http://dx.doi.org/10.3390/nano12203631.

Testo completo
Abstract (sommario):
Photocatalytic degradation of organic pollutants in wastewater is recognized as a promising technology. However, photocatalyst Bi2O3 responds to visible light and suffers from low quantum yield. In this study, the α-Bi2O3 was synthetized and used for removing Cl− in acidic solutions to transform BiOCl. A heterostructured α-Bi2O3/BiOCl nanosheet can be fabricated by coupling Bi2O3 (narrow band gap) with layered BiOCl (rapid photoelectron transmission). During the degradation of Rhodamine B (RhB), the Bi2O3/BiOCl composite material presented excellent photocatalytic activity. Under visible light irradiation for 60 min, the Bi2O3/BiOCl photocatalyst delivered a superior removal rate of 99.9%, which was much higher than pristine Bi2O3 (36.0%) and BiOCl (74.4%). Radical quenching experiments and electron spin resonance spectra further confirmed the dominant effect of electron holes h+ and superoxide radical anions ·O2− for the photodegradation process. This work develops a green strategy to synthesize a high-performance photocatalyst for organic dye degradation.
Gli stili APA, Harvard, Vancouver, ISO e altri
21

Li, Haidong, Yana Wang, Guohui Chen, Yuanhua Sang, Huaidong Jiang, Jiating He, Xu Li e Hong Liu. "Few-layered MoS2 nanosheets wrapped ultrafine TiO2 nanobelts with enhanced photocatalytic property". Nanoscale 8, n. 11 (2016): 6101–9. http://dx.doi.org/10.1039/c5nr08796a.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
22

Li, Yen-Sheng, Alex Fang, Gang-Juan Lee, Jerry J. Wu, Yu-Cheng Chang, Chien-Yie Tsay, Jing-Heng Chen, Tzyy-Leng Horng e Chin-Yi Chen. "Preparation and Photocatalytic Properties of Heterostructured Ceria/Polyaniline Nanoparticles". Catalysts 10, n. 7 (2 luglio 2020): 732. http://dx.doi.org/10.3390/catal10070732.

Testo completo
Abstract (sommario):
Cerium dioxide (CeO2, ceria), a promising and abundant catalytic material with high-efficiency, nontoxicity, photochemical stability, and affordability, can be used as a photocatalyst to photocatalytically degrade organics and split water for hydrogen production under ultraviolet (UV) irradiation (about 5% of solar energy). However, the applications of the CeO2 photocatalyst are limited due to low photocatalytic efficiency under sunlight irradiation. In this study, a nanosized CeO2 powder was prepared by the precipitation method. Subsequently, various amounts of polyaniline (PANI) nanoparticles were deposited onto the surface of the CeO2 nanoparticles to form a heterostructure by the polymerization method. The crystal structure, morphology, surface and optical properties of the CeO2/PANI nanoparticles were investigated by X-ray diffractometry (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), ultraviolet-visible (UV-Vis) absorption spectroscopy, and photoluminescence (PL). Experimental results demonstrated that PANI deposition improved the light absorption of CeO2 nanoparticles in the visible light region. The heterostructured CeO2/PANI nanoparticle with 4 wt % PANI deposition exhibited optimal photocatalytic activities with a hydrogen production rate of 462 μmolg−1 within 6 h and a methyl orange (MO) degradation rate of 45% within 4 h under visible light irradiation. The photocatalytic mechanisms of the composite powder are also proposed in this report.
Gli stili APA, Harvard, Vancouver, ISO e altri
23

Yang, Jinman, Xingwang Zhu, Zhao Mo, Jianjian Yi, Jia Yan, Jiujun Deng, Yuanguo Xu et al. "A multidimensional In2S3–CuInS2 heterostructure for photocatalytic carbon dioxide reduction". Inorganic Chemistry Frontiers 5, n. 12 (2018): 3163–69. http://dx.doi.org/10.1039/c8qi00924d.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
24

Kombo, Miza A., Abdul A. J. Mohamed, Suleiman A. Suleiman e An-Wu Xu. "Novel Graphitic Carbon Nitride/Co-B-P Nanocomposites with Significantly Enhance Visible-Light Photocatalytic Hydrogen Production from Water Splitting". Chemical Science International Journal 33, n. 3 (30 aprile 2024): 73–88. http://dx.doi.org/10.9734/csji/2024/v33i3895.

Testo completo
Abstract (sommario):
As a promising metal-free photocatalyst for hydrogen (H2) production through water splitting under visible-light irradiation, graphitic carbon nitride (g-C3N4) photocatalysts decorated with CoBP was prepared via simple ultra sonification. This paper highlights the structures of the photocatalysts, their stability, rate of hydrogen evolution and the mechanism of charge transfer within the photocatalysts. The prepared C3N4/CoBP nanocomposite photocatalysts were characterized by using X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, scanning electron microscopy and UV–visible (UV–vis) diffuse reflectance spectroscopy. After detailed analysis, the C3N4/CoBP nanocomposite photocatalysts showed excellent photocatalytic performance, which was due to the formation of the heterostructured hybrids of g-C3N4 and CoBP. The effects of C3N4/CoBP nanohybrids on H2 evolution were evaluated. The effects improved with increasing load of CoBP until the optimal level (5 wt% CoBP with visible-light irradiation at λ ≥420 nm). The maximum and remarkable photocatalytic H2 evolution rate of 51.68 μmol h−1 was achieved, which was 3.8 times that obtained from pure g-C3N4. Moreover, the C3N4/CoBP heterostructured nanohybrids demonstrated extremely high photostability and recyclability for H2 evolution after visible light illumination. The composite hybrid accelerated the separation and transfer of photogenerated charge carriers and subsequently suppressed charge recombination. Conclusively, this study offered an opportunity for the design and synthesis of highly stable and efficient C3N4/CoBP nanocomposite photocatalysts for energy conversion and utilisation.
Gli stili APA, Harvard, Vancouver, ISO e altri
25

Ghugal, Sachin G., Suresh S. Umare e Rajamma Sasikala. "Mineralization of anionic dyes over visible light responsive Cd(x)Zn(y)S–Nb2O5 heterostructured photocatalysts". RSC Advances 6, n. 68 (2016): 64047–55. http://dx.doi.org/10.1039/c6ra06023d.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
26

Behera, Arjun, Pradeepta Babu e Kulamani Parida. "Growth of macroporous TiO2 on B-doped g-C3N4 nanosheets: a Z-scheme photocatalyst for H2O2 production and phenol oxidation under visible light". Inorganic Chemistry Frontiers 8, n. 6 (2021): 1489–99. http://dx.doi.org/10.1039/d0qi01327g.

Testo completo
Abstract (sommario):
BCN/TiO2 heterostructured photocatalyst was demonstrated towards H2O2 production and phenol oxidation under visible light, based on Z-scheme and p–n heterojunction mechanism.
Gli stili APA, Harvard, Vancouver, ISO e altri
27

Tahmasebi, N., e S. Madmoli. "Facile synthesis of a WOx/CsyWO3 heterostructured composite as a visible light photocatalyst". RSC Advances 8, n. 13 (2018): 7014–21. http://dx.doi.org/10.1039/c7ra12355h.

Testo completo
Abstract (sommario):
In this work, a WOx/CsyWO3 heterostructured composite photocatalyst was synthesized via a simple pyrolysis method followed by heat treatment under a reducing atmosphere.
Gli stili APA, Harvard, Vancouver, ISO e altri
28

Cai, Xiaoyan, Miao Su, Zhongtian Zeng, Haifeng Weng, Zhiguo Cai, Junying Zhang e Liang Mao. "Boosting the photocatalytic H2 evolution activity of a CdS/N-doped ZnIn2S4 direct Z-scheme heterostructure using a band alignment regulation strategy". Sustainable Energy & Fuels 5, n. 24 (2021): 6441–48. http://dx.doi.org/10.1039/d1se01266e.

Testo completo
Abstract (sommario):
CdS/N-doped ZnIn2S4 Z-scheme heterostructured photocatalyst is developed for H2 evolution basing on a band alignment regulation strategy, where the enlarged Fermi level difference facilitates a stronger built-in electric field for charge separation.
Gli stili APA, Harvard, Vancouver, ISO e altri
29

Ye, Chen, e Yu Huan. "Studies on Electron Escape Condition in Semiconductor Nanomaterials via Photodeposition Reaction". Materials 15, n. 6 (13 marzo 2022): 2116. http://dx.doi.org/10.3390/ma15062116.

Testo completo
Abstract (sommario):
In semiconductor material-driven photocatalysis systems, the generation and migration of charge carriers are core research contents. Among these, the separation of electron-hole pairs and the transfer of electrons to a material’s surface played a crucial role. In this work, photodeposition, a photocatalysis reaction, was used as a “tool” to point out the electron escaping sites on a material’s surface. This “tool” could be used to visually indicate the active particles in photocatalyst materials. Photoproduced electrons need to be transferred to the surface, and they will only participate in reactions at the surface. By reacting with escaped electrons, metal ions could be reduced to nanoparticles immediately and deposited at electron come-out sites. Based on this, the electron escaping conditions of photocatalyst materials have been investigated and surveyed through the photodeposition of platinum. Our results indicate that, first, in monodispersed nanocrystal materials, platinum nanoparticles deposited randomly on a particle’s surface. This can be attributed to the abundant surface defects, which provide driving forces for electron escaping. Second, platinum nanoparticles were found to be deposited, preferentially, on one side in heterostructured nanocrystals. This is considered to be a combination result of work function difference and existence of heterojunction structure.
Gli stili APA, Harvard, Vancouver, ISO e altri
30

Alaya, Yassine, Bilel Chouchene, Ghouti Medjahdi, Lavinia Balan, Noureddine Bouguila e Raphaël Schneider. "Heterostructured S-TiO2/g-C3N4 Photocatalysts with High Visible Light Photocatalytic Activity". Catalysts 14, n. 4 (28 marzo 2024): 226. http://dx.doi.org/10.3390/catal14040226.

Testo completo
Abstract (sommario):
Novel heterojunctions associating graphitic carbon nitride g-C3N4 and S-doped TiO2 nanoparticles were successfully designed and prepared via a hydrothermal method and used for photocatalytic degradations. The loading in S-TiO2 nanoparticles on g-C3N4 was varied (5, 10 and 20 wt%), and the photocatalysts were characterized by XRD, FT-IR, solid-state UV-visible diffuse reflectance, photoluminescence, XPS, TEM and SEM. The S-TiO2 (5%)/g-C3N4 catalyst exhibits the highest activity for the photocatalytic degradation of the methylene blue (MB) dye under visible light irradiation. The high photocatalytic performance originates from the enhanced separation and transfer of photogenerated charge carriers. The S-TiO2 (5%)/g-C3N4 photocatalyst is stable and can be reused five times without a sharp drop in activity, indicating its high potential for wastewater remediation.
Gli stili APA, Harvard, Vancouver, ISO e altri
31

Wang, Wen-Min, Lu Zhang, Wen-Long Wang, Jin-Yi Huang, Qian-Yuan Wu e Jerry J. Wu. "Photocatalytic Degradation of 1,4-Dioxane by Heterostructured Bi2O3/Cu-MOF Composites". Catalysts 13, n. 8 (15 agosto 2023): 1211. http://dx.doi.org/10.3390/catal13081211.

Testo completo
Abstract (sommario):
Photocatalysts exhibiting high activity for the degradation of 1,4-dioxane (1,4-D) have been a subject of intense focus due to their high toxicity and challenging degradability. Bismuth oxide (Bi2O3) is recognized as an ideal photocatalyst; however, there have been limited studies on its effectiveness in 1,4-D degradation. It is crucial to address the issue of low photocatalytic efficiency attributed to the instability and easy recombination of photogenerated electrons and holes in Bi2O3 upon photoexcitation. In this study, Cu-MOF and oxygen vacancy were utilized to improve the 1,4-D photocatalytic degradation efficiency of Bi2O3 by preparing Bi2O3, Bi2O3/Cu-MOF, Bi2O3−x, and Bi2O3−x/Cu-MOF. The results revealed that the incorporation of Cu-MOF induced a larger specific surface area, a well-developed pore structure, and a smaller particle size in Bi2O3, facilitating enhanced visible light utilization and an improved photoelectron transfer rate, leading to the highest photocatalytic activity observed in Bi2O3/Cu-MOF. In addition, oxygen vacancies were found to negatively affect the photocatalytic activity of Bi2O3, mainly due to the transformation of the β-Bi2O3 crystalline phase into α-Bi2O3 caused by oxygen vacancies. Further, the synergistic effect of MOF and oxygen vacancies did not positively affect the photocatalytic activity of Bi2O3. Therefore, the construction of heterojunctions using Cu-MOF can significantly enhance the efficiency of degradation of 1,4-D, and Bi2O3/Cu-MOF appears to be a promising photocatalyst for 1,4-D degradation. This study opens new avenues for the design and optimization of advanced photocatalytic materials with improved efficiency for the treatment of recalcitrant organic pollutants.
Gli stili APA, Harvard, Vancouver, ISO e altri
32

Liu, Xiaoyan, Siyi Lv, Baoyan Fan, An Xing e Bi Jia. "Ferroelectric Polarization-Enhanced Photocatalysis in BaTiO3-TiO2 Core-Shell Heterostructures". Nanomaterials 9, n. 8 (3 agosto 2019): 1116. http://dx.doi.org/10.3390/nano9081116.

Testo completo
Abstract (sommario):
Suppressing charge recombination and improving carrier transport are key challenges for the enhancement of photocatalytic activity of heterostructured photocatalysts. Here, we report a ferroelectric polarization-enhanced photocatalysis on the basis of BaTiO3-TiO2 core-shell heterostructures synthesized via a hydrothermal process. With an optimal weight ratio of BaTiO3 to TiO2, the heterostructures exhibited the maximum photocatalytic performance of 1.8 times higher than pure TiO2 nanoparticles. The enhanced photocatalytic activity is attributed to the promotion of charge separation and transport based on the internal electric field originating from the spontaneous polarization of ferroelectric BaTiO3. High stability of polarization-enhanced photocatalysis is also confirmed from the BaTiO3-TiO2 core-shell heterostructures. This study provides evidence that ferroelectric polarization holds great promise for improving the performance of heterostructured photocatalysts.
Gli stili APA, Harvard, Vancouver, ISO e altri
33

Zheng, Yun, Yilin Chen, Lvting Wang, Mingyue Tan, Yingying Xiao, Bifen Gao e Bizhou Lin. "Metal-free 2D/2D heterostructured photocatalyst of black phosphorus/covalent triazine-based frameworks for water splitting and pollutant degradation". Sustainable Energy & Fuels 4, n. 7 (2020): 3739–46. http://dx.doi.org/10.1039/d0se00394h.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
34

Markhabayeva, Aiymkul A., Zhanar K. Kalkozova, Renata Nemkayeva, Yerassyl Yerlanuly, Assiya A. Anarova, Malika A. Tulegenova, Aida T. Tulegenova e Khabibulla A. Abdullin. "Construction of a ZnO Heterogeneous Structure Using Co3O4 as a Co-Catalyst to Enhance Photoelectrochemical Performance". Materials 17, n. 1 (27 dicembre 2023): 146. http://dx.doi.org/10.3390/ma17010146.

Testo completo
Abstract (sommario):
Recently, heterostructured photocatalysts have gained significant attention in the field of photocatalysis due to their superior properties compared to single photocatalysts. One of the key advantages of heterostructured photocatalysts is their ability to enhance charge separation and broaden the absorption spectrum, thereby improving photocatalytic efficiency. Zinc oxide is a widely used n-type semiconductor with a proper photoelectrochemical activity. In this study, zinc oxide nanorod arrays were synthesized, and then the surfaces of ZnO nanorods were modified with the p-type semiconductor Co3O4 to create a p–n junction heterostructure. A significant increase in the photocurrent for the ZnO/Co3O4 composite, of 4.3 times, was found compared to pure ZnO. The dependence of the photocurrent on the morphology of the ZnO/Co3O4 composite allows for optimization of the morphology of the ZnO nanorod array to achieve improved photoelectrochemical performance. The results showed that the ZnO/Co3O4 heterostructure exhibited a photocurrent density of 3.46 mA/cm2, while bare ZnO demonstrated a photocurrent density of 0.8 mA/cm2 at 1.23 V. The results of this study provide a better understanding of the mechanism of charge separation and transfer in the heterostructural ZnO/Co3O4 photocatalytic system. Furthermore, the results will be useful for the design and optimization of photocatalytic systems for water splitting and other applications.
Gli stili APA, Harvard, Vancouver, ISO e altri
35

Yang, Yang. "Plasmonic Heterosturcture for Full Solar Spectrum Harvesting". ECS Meeting Abstracts MA2018-01, n. 31 (13 aprile 2018): 1873. http://dx.doi.org/10.1149/ma2018-01/31/1873.

Testo completo
Abstract (sommario):
Clean chemical fuel (hydrogen) generation from water using heterogeneous photocatalysts is an emerging technology for sustainable energy research. However, photo-to-hydrogen conversion efficiency of benchmarking photocatalysts still appear to be far from practice due to their limited light absorption of solar irradiation spectrum (UV-vis-NIR) and poor excited carrier lifetime. There is, therefore, an increasing interest in developing high efficiency photocatalysts with a broad spectral response and efficient excited carriers separation. In this work, a novel MoS2@TiO2 heterostructured film with periodically patterned morphology, exhibiting an enhanced light absorption within UV-vis-NIR wavelengths, was developed. Both experimental studies and theoretical modeling demonstrate that S-vacancy in the multilayered MoS2 nanoflakes is responsible for the localized surface plasmon resonance (LSPR, visible light absorption) and tunable band gaps (near infrared absorption). An outstanding H2 yield rate of 580 mmol h-1 g-1 was then achieved using the rationally designed novel MoS2@TiO2 photocatalyst. Present study also shows that the developed catalyst can even split sea water under solar light irradiation, which will open a new paradigm for direct solar energy harvesting.
Gli stili APA, Harvard, Vancouver, ISO e altri
36

Liu, Tingting, Fanyu Yang, Liming Wang, Liang Pei, Yushan Hu, Ru Li, Kang Hou e Tianlong Ren. "Synergistic Effect of Charge Separation and Multiple Reactive Oxygen Species Generation on Boosting Photocatalytic Degradation of Fluvastatin by ZnIn2S4/Bi2WO6 Z-Scheme Heterostructured Photocatalytst". Toxics 10, n. 10 (22 settembre 2022): 555. http://dx.doi.org/10.3390/toxics10100555.

Testo completo
Abstract (sommario):
The application of semiconductor photocatalysts with narrow band gaps is hindered by the rapid recombination of electron–hole pairs and limitation of multiple reactive oxygen species (ROS) synchronous generation. A n–n-type direct Z-scheme heterostructured photocatalyst was constructed based on the staggered band alignment of bismuth tungstate (Bi2WO6) and indium zinc sulfide (ZnIn2S4) to reveal the synergistic effect of charge separation and multiple ROS synchronous generation on boosting photocatalytic performance. Under irradiation, electrons in the conduction band (CB) of Bi2WO6 and holes in the valence band (VB) of ZnIn2S4 recombined at interface to prolong the lifetime of electrons in the CB of ZnIn2S4 and holes in the VB of Bi2WO6. Meanwhile, the multiple ROS synchronously generated to oxidize pollutant due to the strong redox ability of electrons of ZnIn2S4 and holes of Bi2WO6, which was determined by the CB potential of ZnIn2S4 and VB potential of Bi2WO6. The results provided valuable insights for the application of photocatalysts with a narrow band gap in the field of water pollution control.
Gli stili APA, Harvard, Vancouver, ISO e altri
37

Tatykayev, Batukhan, Bilel Chouchene, Lavinia Balan, Thomas Gries, Ghouti Medjahdi, Emilien Girot, Bolat Uralbekov e Raphaël Schneider. "Heterostructured g-CN/TiO2 Photocatalysts Prepared by Thermolysis of g-CN/MIL-125(Ti) Composites for Efficient Pollutant Degradation and Hydrogen Production". Nanomaterials 10, n. 7 (16 luglio 2020): 1387. http://dx.doi.org/10.3390/nano10071387.

Testo completo
Abstract (sommario):
Photocatalysts composed of graphitic carbon nitride (g-CN) and TiO2 were efficiently prepared by thermolysis of the MIL-125(Ti) metal organic framework deposited on g-CN. The heterojunction between the 12 nm-sized TiO2 nanoparticles and g-CN was well established and the highest photocatalytic activity was observed for the g-CN/TiO2 (3:1) material. The g-CN/TiO2 (3:1) composite exhibits high visible light performances both for the degradation of pollutants like the Orange II dye or tetracycline but also for the production of hydrogen (hydrogen evolution rate (HER) up to 1330 μmolh−1g−1 and apparent quantum yield of 0.22% using NiS as a cocatalyst). The improved visible light performances originate from the high specific surface area of the photocatalyst (86 m2g−1) and from the efficient charge carriers separation as demonstrated by photoluminescence, photocurrent measurements, and electrochemical impedance spectroscopy. The synthetic process developed in this work is based on the thermal decomposition of metal organic framework deposited on a graphitic material and holds huge promise for the preparation of porous heterostructured photocatalysts.
Gli stili APA, Harvard, Vancouver, ISO e altri
38

Kappadan, Shabina, Sabu Thomas e Nandakumar Kalarikkal. "BaTiO3/ZnO heterostructured photocatalyst with improved efficiency in dye degradation". Materials Chemistry and Physics 255 (novembre 2020): 123583. http://dx.doi.org/10.1016/j.matchemphys.2020.123583.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
39

Ruzimuradov, Olim, Suvankul Nurmanov, Mirabbos Hojamberdiev, Ravi Mohan Prasad, Alexander Gurlo, Joachim Broetz, Kazuki Nakanishi e Ralf Riedel. "Preparation and characterization of macroporous TiO2–SrTiO3 heterostructured monolithic photocatalyst". Materials Letters 116 (febbraio 2014): 353–55. http://dx.doi.org/10.1016/j.matlet.2013.11.065.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
40

Kim, T. W., S. G. Hur, S. J. Hwang, H. Park, W. Choi e J. H. Choy. "Heterostructured Visible-Light-Active Photocatalyst of Chromia-Nanoparticle-Layered Titanate". Advanced Functional Materials 17, n. 2 (22 gennaio 2007): 307–14. http://dx.doi.org/10.1002/adfm.200600022.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
41

Luo, Kaiyi, Jing Li, Wenyu Hu, Han Li, Qiuping Zhang, Huan Yuan, Fei Yu, Ming Xu e Shuyan Xu. "Synthesizing CuO/CeO2/ZnO Ternary Nano-Photocatalyst with Highly Effective Utilization of Photo-Excited Carriers under Sunlight". Nanomaterials 10, n. 10 (29 settembre 2020): 1946. http://dx.doi.org/10.3390/nano10101946.

Testo completo
Abstract (sommario):
The construction of heterostructured photocatalyst with an appropriate energy band structure will help realize highly efficient photo-excited charge separation. In this study, ternary CuO/CeO2/ZnO nano-particle (NP) composites were synthesized by a facile two-step sol-gel method, which exhibit significantly enhanced photocatalytic degradation performance for various organic pollutants under UV and visible light excitation. The photo-responses to both UV and visible light, as well as the visible light absorption and utilization rates of ZnO are found to be synergistically intensified by CeO2 and CuO co-coupling. The first-order kinetic constants (K) of 3%CuO/CeO2/ZnO for methylene blue (MB) degradation are ~3.9, ~4.1 and ~4.8 times higher than ZnO under UV light, visible light and simulated sunlight illumination, respectively. The roles of CuO and CeO2 in optical properties and photo-degradation under UV and visible light were explored. Besides, the photogenic holes (h+) of ZnO, CeO2, and the produced hydroxyl radicals (·OH) are proved to be the main active species under UV light. Dissimilarly, under visible light, the superoxide radicals (·O2−) formed by the reactions between oxygen molecules and the photo-generated electrons (e−) of CuO moving towards the catalysts surface are also found to be important for promoting dye decomposition. The improved photo-responses, the well-matched band structure that facilitates charge transfer processes, and the highly efficient utilization of the photo-excited carriers of the ternary nano-heterostructure are suggested to be the key factors for the remarkable enhancement of photocatalytic performance of ZnO nano-photocatalyst. This work offers a low-cost strategy to acquire highly active UV and visible light-driven photocatalyst.
Gli stili APA, Harvard, Vancouver, ISO e altri
42

Prashanth, G. K., M. S. Dileep, P. A. Prashanth, S. S. Sreeja Mole, S. R. Boselin Prabhu, B. M. Nagabhushana, S. Ravichandran e N. P. Bhagya. "An evaluation of noble nanocomposites based on zinc oxide: synthesis, characterization, environmental, optical and biomedical applications". Journal of Optoelectronic and Biomedical Materials 13, n. 4 (ottobre 2021): 151–69. http://dx.doi.org/10.15251/jobm.2021.134.151.

Testo completo
Abstract (sommario):
Metal oxide nanocomposites have concerned an obvious agreement of consideration because of their enormous applications in numerous domains like photocatalyst, catalysis, biological and sensors. The conservational purification technology is getting advanced by the development of heterostructured semiconductor photocatalysts. In this paper, we documented a comparative analysis of synthesis process (Solution-based methods, High temperature-based methods and Electrical methods) and characterisation techniques such as Transmission electron microscopy, X-ray diffraction, Fourier-transform infrared spectroscopy and Scanning electron microscopy on various noble Nanocomposites (NCs) of metal (M) - zinc oxide (ZnO/ZO). This review inclines over multiple stat-of-the-art applications like photocatalytic, catalyst, sensor and biological activities. It could be concluded from this study that, the catalytic activity of noble M-ZO nanostructures depends not only on the noble metal species, but on the catalytic material architecture as well. The future research and development challenges together with future prospects are critically presented.
Gli stili APA, Harvard, Vancouver, ISO e altri
43

Wang, Xinling, Di Zhu, Yan Zhong, Dianhui Wang e Chaohao Hu. "AgBr/(Sr0.6Bi0.305)2Bi2O7 Heterostructured Composites: Fabrication, Characterization, and Significantly Enhanced Photocatalytic Activity". Catalysts 9, n. 5 (26 aprile 2019): 394. http://dx.doi.org/10.3390/catal9050394.

Testo completo
Abstract (sommario):
The pyrochlore-type (Sr0.6Bi0.305)2Bi2O7 (SBO) containing Bi3+ and Bi5+ mixed valent states was first investigated as a photocatalyst in our very recent work. To further improve the photocatalytic performance, AgBr/SBO heterostructured composites were synthesized by using a deposition-precipitation method. The characterization of phase structure, morphology, microstructure, elemental composition, and optical properties of the obtained products were performed using X-ray diffractometer (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM)TEM, X-ray photoelectron spectroscopy (XPS), UV-visible diffuse reflectance spectroscopy (UV-vis DRS). The photocatalytic activity of samples was evaluated by degrading methylene blue under visible light illumination. AgBr/SBO composites possess high stability and significantly enhanced photocatalytic performance. The improvement of photocatalytic activity is due to the enhanced light absorption and the separation of photoinduced electrons and holes on the interface of AgBr/SBO heterostructured composites.
Gli stili APA, Harvard, Vancouver, ISO e altri
44

Liu, Rong, Mingming Li, Jie Chen, Yu Yin, Wei Zhao, Zhanghao Gong, Hua Jin e Zhigang Liu. "Enhanced Photocatalytic Degradation of Tetracycline by Magnetically Separable g-C3N4-Doped Magnetite@Titanium Dioxide Heterostructured Photocatalyst". Water 16, n. 10 (11 maggio 2024): 1372. http://dx.doi.org/10.3390/w16101372.

Testo completo
Abstract (sommario):
Residual drug pollutants in water environments represent a severe risk to human health, so developing a cheap, environmentally friendly, and effective photocatalyst to deal with them has become a hot topic. Herein, a magnetically separable Fe3O4@TiO2/g-C3N4 photocatalyst with a special heterojunction structure was fabricated, and its photocatalytic performance was assessed by degrading tetracycline (TC). Compared to Fe3O4@TiO2, the synthesized Fe3O4@TiO2/g-C3N4 exhibited superior TC degradation performance, which was primarily ascribed to the heterojunction formed between TiO2 and g-C3N4 and its ability to enhance the visible light absorption capacity and reduce the photoinduced electron/hole recombination rate. Moreover, a free radical capture experiment further confirmed that ·O2− and h+ are the predominant components in the TC degradation reaction. Under UV–Vis irradiation, the TC degradation rate escalated to as high as 98% within 120 min. Moreover, Fe3O4@TiO2/g-C3N4 was demonstrated to be easily recovered by magnetic separation without any notable loss even after five cycles, showing exceptional stability and reusability. These findings indicate that Fe3O4@TiO2/g-C3N4 is a promising photocatalyst for environmental remediation that may provide a sustainable approach to degrading antibiotic pollutants in wastewater.
Gli stili APA, Harvard, Vancouver, ISO e altri
45

Kumar, Anurag, Abderrahmane Hamdi, Yannick Coffinier, Ahmed Addad, Pascal Roussel, Rabah Boukherroub e Suman L. Jain. "Visible light assisted oxidative coupling of benzylamines using heterostructured nanocomposite photocatalyst". Journal of Photochemistry and Photobiology A: Chemistry 356 (aprile 2018): 457–63. http://dx.doi.org/10.1016/j.jphotochem.2018.01.033.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
46

Song, Guixian, Feng Xin, Jingshuai Chen e Xiaohong Yin. "Photocatalytic reduction of CO2 in cyclohexanol on CdS–TiO2 heterostructured photocatalyst". Applied Catalysis A: General 473 (marzo 2014): 90–95. http://dx.doi.org/10.1016/j.apcata.2013.12.035.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
47

Zhao, Wei, Nianqi Liu, Hongxing Wang e Lihao Mao. "Sacrificial template synthesis of core-shell SrTiO3/TiO2 heterostructured microspheres photocatalyst". Ceramics International 43, n. 6 (aprile 2017): 4807–13. http://dx.doi.org/10.1016/j.ceramint.2016.12.009.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
48

Jiang, Da-yu, Da Xu, Jia Zheng, Yang Yang, Chang Liu, Yu-shuang Wang, Guang-bo Che, Xue Lin e Li-min Chang. "Efficient Removal Phenol Red over Ternary Heterostructured Ag-Bi2MoO6/BiPO4Composite Photocatalyst". Chinese Journal of Chemical Physics 29, n. 5 (27 ottobre 2016): 600–606. http://dx.doi.org/10.1063/1674-0068/29/cjcp1602034.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
49

Liu, Yumin, Peng Zhang, Hua Lv, Jing Guang, Shuang Li e Juhui Jiang. "A nanosheet-like BiPO4/Bi2O2CO3 heterostructured photocatalyst with enhanced photocatalytic activity". RSC Advances 5, n. 102 (2015): 83764–72. http://dx.doi.org/10.1039/c5ra16146k.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
50

Hou, Huilin, Xiangkang Zeng e Xiwang Zhang. "2D/2D heterostructured photocatalyst: Rational design for energy and environmental applications". Science China Materials 63, n. 11 (1 aprile 2020): 2119–52. http://dx.doi.org/10.1007/s40843-019-1256-0.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Offriamo sconti su tutti i piani premium per gli autori le cui opere sono incluse in raccolte letterarie tematiche. Contattaci per ottenere un codice promozionale unico!

Vai alla bibliografia