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John N, Priyanka RN, Abraham T, Punnoose MS, John BK, Mathew B. Rational design of Ag 2CO 3-loaded SGO heterostructure with enhanced photocatalytic abatement of organic pollutants under visible light irradiation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:53225-53237. [PMID: 35278183 DOI: 10.1007/s11356-022-19606-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 03/03/2022] [Indexed: 06/14/2023]
Abstract
The photocatalytic activity of semiconducting silver carbonate was restricted by the lower stability and fast recombination rate of photogenerated electron-hole pairs. Sulfur-doped graphene oxide (SGO) is used as a cocatalyst for improving the photocatalytic activity of Ag2CO3 by reducing the recombination rate. A simple precipitation method was used for the modification of silver carbonate. The chemical, physical, optical, and electrochemical properties of the modified photocatalyst was characterized by XRD, SEM, TEM, UV-vis DRS, XPS, CV, impedance, and amperometry. The fabricated SGO-Ag2CO3 composite was successfully degraded various organic pollutants such as methylene blue (MB), rhodamine B(RhB), methyl orange (MO), tartrazine, and thiram with augmented mineralization. The optimization of weight percentage of the developed binary composite with 0.5% SGO-Ag2CO3 showed enhanced photocatalytic degradation and followed pseudo-first-order kinetics with rate constant 0.126. More than 90% of degradation efficiency of the pollutants within a short time promises the binary heterostructure for future industrial applications. The excellent stability and reproducibility of the composite opened a new route in the treatment of wastewater.
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Affiliation(s)
- Neenamol John
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam, 686560, Kerala, India
| | - Ragam N Priyanka
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam, 686560, Kerala, India
| | - Thomas Abraham
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam, 686560, Kerala, India
| | | | - Bony K John
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam, 686560, Kerala, India
| | - Beena Mathew
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam, 686560, Kerala, India.
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2
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In situ formation of small-scale Ag2S nanoparticles in carbonaceous aerogel for enhanced photodegradation performance. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111476] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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3
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Karunakaran C, JebaSingh I, Vinayagamoorthy P. Synthesis of superparamagnetic biocidal superior solar photocatalytic Fe3O4-implanted Ag2S-capped ZnO micro-clubbells. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0758-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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4
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Liu C, Wang J, Yang S, Li X, Lin X. Ag 3PO 4 nanocrystals and g-C 3N 4 quantum dots decorated Ag 2WO 4 nanorods: ternary nanoheterostructures for photocatalytic degradation of organic contaminants in water. RSC Adv 2019; 9:8065-8072. [PMID: 35521195 PMCID: PMC9061237 DOI: 10.1039/c8ra09815h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 02/27/2019] [Indexed: 11/21/2022] Open
Abstract
Visible-light-driven Ag3PO4/graphite-like carbon nitride/Ag2WO4 photocatalysts with different weight fractions of Ag3PO4 were synthesized. Ag2WO4 nanorods with a scale of 500 nm to 3 μm were prepared by using a hydrothermal reaction. Via a facile deposition-precipitation technique, graphite-like carbon nitride (g-C3N4) quantum dots and Ag3PO4 nanocrystals were then deposited onto the surface of Ag2WO4 nanorods sequentially. Under visible-light irradiation (λ > 420 nm), the Ag3PO4/g-C3N4/Ag2WO4 nanorods degraded Rh B efficiently and displayed much higher photocatalytic activity than that of pure Ag2WO4 and the g-C3N4/Ag2WO4 composite, and the Ag3PO4/g-C3N4/Ag2WO4 hybrid photocatalyst with 30 wt% of Ag3PO4 exhibited the highest photocatalytic activity. The quenching effects of different scavengers demonstrated that reactive h+ and ·O2- played the major roles in Rh B degradation. It was elucidated that the excellent photocatalytic activity of Ag3PO4/g-C3N4/Ag2WO4 for the degradation of Rh B under visible light (λ > 420 nm) can be ascribed to the efficient separation of photogenerated electrons and holes through the Ag3PO4/g-C3N4/Ag2WO4 heterostructure.
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Affiliation(s)
- Chang Liu
- Key Laboratory of Preparation and Application of Environmental Friendly Materials, Jilin Normal University, Ministry of Education Changchun 130103 China
| | - Jingbo Wang
- College of Material Science and Engineering, Beihua University Jilin 132013 China +86 434 329 2154 +86 1569434 9717
| | - Shuang Yang
- College of Material Science and Engineering, Beihua University Jilin 132013 China +86 434 329 2154 +86 1569434 9717
| | - Xiuying Li
- Key Laboratory of Preparation and Application of Environmental Friendly Materials, Jilin Normal University, Ministry of Education Changchun 130103 China
| | - Xue Lin
- College of Material Science and Engineering, Beihua University Jilin 132013 China +86 434 329 2154 +86 1569434 9717
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Zhao X, Yang H, Li R, Cui Z, Liu X. Synthesis of heterojunction photocatalysts composed of Ag 2 S quantum dots combined with Bi 4 Ti 3 O 12 nanosheets for the degradation of dyes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:5524-5538. [PMID: 30607858 DOI: 10.1007/s11356-018-4050-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 12/19/2018] [Indexed: 06/09/2023]
Abstract
Facilitating the separation of photogenerated electron/hole pairs and widening the light-responsive region are crucial to enhance the overall photocatalytic performance of photocatalysts. To achieve this aim, here we have prepared Ag2S/Bi4Ti3O12 heterojunction composite photocatalysts by assembling Ag2S quantum dots onto the surface of Bi4Ti3O12 nanosheets. Transmission electron microscopy observation demonstrates that two types of Ag2S quantum dots separately with size of 40-70 and 7-17 nm are uniformly assembled onto the surface of large-sized Bi4Ti3O12 thin nanosheets. The as-prepared Ag2S/Bi4Ti3O12 heterojunction composites exhibit much enhanced light absorption (particularly in the visible and near-infrared region) and highly efficient separation of electrons and holes photogenerated in Bi4Ti3O12. Rhodamine B (RhB) aqueous solution was chosen as the target organic pollutant to evaluate the photocatalytic performance of the samples under simulated sunlight irradiation. It is found that the Ag2S/Bi4Ti3O12 heterojunction composites manifest significantly enhanced photocatalytic activity toward the RhB degradaton. In particular, the 15wt% Ag2S/Bi4Ti3O12 composite exhibits the highest photocatalytic activity, which is ca. 2.8 and 4.0 times higher than bare Bi4Ti3O12 and Ag2S, respectively. The enhanced photocatalytic activity of the composites can be explained as a result of the Z-scheme electron transfer from the conduction band of Bi4Ti3O12 to the valence band of Ag2S, and thus more photogenerated holes in the valence band of Bi4Ti3O12 and electrons in the conduction band of Ag2S are able to participate in the photocatalytic reactions. Active species trapping experiments were carried out, from which it is concluded that photogenerated holes and •O2- radicals play the dominant and secondary role in the photocatalysis, respectively.
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Affiliation(s)
- Xinxin Zhao
- State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, 730050, China
- School of Science, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Hua Yang
- State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, 730050, China.
- School of Science, Lanzhou University of Technology, Lanzhou, 730050, China.
| | - Ruishan Li
- School of Science, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Ziming Cui
- School of Science, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Xueqin Liu
- School of Science, Chongqing University of Technology, Chongqing, 4000054, China
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Wang BY, Zhang GY, Cui GW, Xu YY, Liu Y, Xing CY. Controllable fabrication of α-Ag2WO4 nanorod-clusters with superior simulated sunlight photocatalytic performance. Inorg Chem Front 2019. [DOI: 10.1039/c8qi01025k] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work presents the greatly boosted photoactivity of α-Ag2WO4 nanorod-clusters fabricated by adjusting the molar ratio of raw materials.
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Affiliation(s)
- Bing-Yu Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry
- Ministry of Education; College of Chemistry
- Tianjin Normal University
- Tianjin 300387
- P. R. China
| | - Guo-Ying Zhang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry
- Ministry of Education; College of Chemistry
- Tianjin Normal University
- Tianjin 300387
- P. R. China
| | - Guan-Wei Cui
- College of Chemistry
- Chemical Engineering and Materials Science
- Shandong Normal University
- Jinan 250014
- P. R. China
| | - Yan-Yan Xu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry
- Ministry of Education; College of Chemistry
- Tianjin Normal University
- Tianjin 300387
- P. R. China
| | - Yue Liu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry
- Ministry of Education; College of Chemistry
- Tianjin Normal University
- Tianjin 300387
- P. R. China
| | - Chun-Yan Xing
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry
- Ministry of Education; College of Chemistry
- Tianjin Normal University
- Tianjin 300387
- P. R. China
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7
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In Situ Formation of Leaf-Like Ag2S/CdS Heterojunction Photocatalyst Harnessing Vis–NIR Light for Photodegradation of Organic Pollutants. Catal Letters 2018. [DOI: 10.1007/s10562-018-2489-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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8
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Li S, Hu S, Jiang W, Liu Y, Liu Y, Zhou Y, Mo L, Liu J. Ag 2WO 4 nanorods decorated with AgI nanoparticles: Novel and efficient visible-light-driven photocatalysts for the degradation of water pollutants. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2018; 9:1308-1316. [PMID: 29765809 PMCID: PMC5942385 DOI: 10.3762/bjnano.9.123] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 03/29/2018] [Indexed: 05/12/2023]
Abstract
To develop efficient and stable visible-light-driven (VLD) photocatalysts for pollutant degradation, we synthesized novel heterojunction photocatalysts comprised of AgI nanoparticle-decorated Ag2WO4 nanorods via a facile method. Various characterization techniques, including XRD, SEM, TEM, EDX, and UV-vis DRS were used to investigate the morphology and optical properties of the as-prepared AgI/Ag2WO4 catalyst. With AgI acting as the cocatalyst, the resulting AgI/Ag2WO4 heterostructure shows excellent performance in degrading toxic, stable pollutants such as rhodamine B (RhB), methyl orange (MO) and para-chlorophenol (4-CP). The high performance is attributed to the enhanced visible-light absorption properties and the promoted separation efficiency of charge carriers through the formation of the heterojunction between AgI and Ag2WO4. Additionally, AgI/Ag2WO4 exhibits durable stability. The active species trapping experiment reveals that active species (O2•- and h+) dominantly contribute to RhB degradation. The AgI/Ag2WO4 heterojunction photocatalyst characterized in this work holds great potential for remedying environmental issues due to its simple preparation method and excellent photocatalytic performance.
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Affiliation(s)
- Shijie Li
- Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province, Institute of Innovation & Application, Zhejiang Ocean University, Zhoushan, Zhejiang Province, 316022, China
| | - Shiwei Hu
- Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province, Institute of Innovation & Application, Zhejiang Ocean University, Zhoushan, Zhejiang Province, 316022, China
| | - Wei Jiang
- Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province, Institute of Innovation & Application, Zhejiang Ocean University, Zhoushan, Zhejiang Province, 316022, China
| | - Yanping Liu
- Department of Environmental Engineering, Zhejiang Ocean University, Zhoushan, Zhejiang Province, 316022, China
| | - Yu Liu
- Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province, Institute of Innovation & Application, Zhejiang Ocean University, Zhoushan, Zhejiang Province, 316022, China
| | - Yingtang Zhou
- Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province, Institute of Innovation & Application, Zhejiang Ocean University, Zhoushan, Zhejiang Province, 316022, China
| | - Liuye Mo
- Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province, Institute of Innovation & Application, Zhejiang Ocean University, Zhoushan, Zhejiang Province, 316022, China
| | - Jianshe Liu
- State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
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Xue B, Jiang HY, Sun T, Mao F, Ma CC, Wu JK. Microwave-assisted one-step rapid synthesis of ternary Ag/Ag2S/g-C3N4 heterojunction photocatalysts for improved visible-light induced photodegradation of organic pollutant. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.12.021] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Huo P, Liu C, Wu D, Guan J, Li J, Wang H, Tang Q, Li X, Yan Y, Yuan S. Fabricated Ag/Ag 2 S/reduced graphene oxide composite photocatalysts for enhancing visible light photocatalytic and antibacterial activity. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2017.08.015] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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11
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Abstract
![]()
Among
the various postsynthesis treatments of colloidal nanocrystals
that have been developed to date, transformations by cation exchange
have recently emerged as an extremely versatile tool that has given
access to a wide variety of materials and nanostructures. One notable
example in this direction is represented by partial cation exchange,
by which preformed nanocrystals can be either transformed to alloy
nanocrystals or to various types of nanoheterostructures possessing
core/shell, segmented, or striped architectures. In this review, we
provide an up to date overview of the complex colloidal nanostructures
that could be prepared so far by cation exchange. At the same time,
the review gives an account of the fundamental thermodynamic and kinetic
parameters governing these types of reactions, as they are currently
understood, and outlines the main open issues and possible future
developments in the field.
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Affiliation(s)
- Luca De Trizio
- Department of Nanochemistry, Istituto Italiano di Tecnologia (IIT) , via Morego, 30, 16163 Genova, Italy
| | - Liberato Manna
- Department of Nanochemistry, Istituto Italiano di Tecnologia (IIT) , via Morego, 30, 16163 Genova, Italy
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12
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Lin Z, Li J, Zheng Z, Yan J, Liu P, Wang C, Yang G. Electronic Reconstruction of α-Ag2WO4 Nanorods for Visible-Light Photocatalysis. ACS NANO 2015; 9:7256-65. [PMID: 26061718 DOI: 10.1021/acsnano.5b02077] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
α-Ag2WO4 (AWO) has been studied extensively due to its H2 evolution and organic pollution degradation ability under the irradiation of UV light. However, the band gap of AWO is theoretically calculated to be 3.55 eV, resulting in its sluggish reaction to visible light. Herein, we demonstrated that, by using the electronic reconstruction of AWO nanorods upon a unique process of laser irradiation in liquid, these nanorods performed good visible-light photocatalytic organics degradation and H2 evolution. Using commercial AWO powders as the starting materials, we achieved the electronic reconstruction of AWO by a recrystallization of the starting powders upon laser irradiation in liquid and synthesized AWO nanorods. Due to the weak bond energy of AWO and the far from thermodynamic equilibrium process created by laser irradiation in liquid, abundant cluster distortions, especially [WO6] cluster distortions, are introduced into the crystal lattice, the defect density increases by a factor of 2.75, and uneven intermediate energy levels are inset into the band gap, resulting in a 0.44 eV decrease of the band gap, which modified the AWO itself by electronic reconstruction to be sensitive to visible light without the addition of others. Further, the first-principles calculation was carried out to clarify the electronic reconstruction of AWO, and the theoretical results confirmed the deduction based on the experimental measurements.
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Gui R, Jin H, Wang Z, Tan L. Recent advances in synthetic methods and applications of colloidal silver chalcogenide quantum dots. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.03.023] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Liang N, Chen W, Dai F, Wu X, Zhang W, Li Z, Shen J, Huang S, He Q, Zai J, Fang N, Qian X. Homogenously hexagonal prismatic AgBiS2nanocrystals: controlled synthesis and application in quantum dot-sensitized solar cells. CrystEngComm 2015. [DOI: 10.1039/c4ce02405b] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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15
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Mehraj O, Pirzada BM, Mir NA, Sultana S, Sabir S. Ag2S sensitized mesoporous Bi2WO6 architectures with enhanced visible light photocatalytic activity and recycling properties. RSC Adv 2015. [DOI: 10.1039/c5ra05117g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
To harvest solar energy more efficiently, novel Ag2S/Bi2WO6 heterojunctions were synthesized by a hydrothermal route.
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Affiliation(s)
- Owais Mehraj
- Department of Chemistry
- Aligarh Muslim University
- Aligarh-202002
- India
| | - Bilal M. Pirzada
- Department of Chemistry
- Aligarh Muslim University
- Aligarh-202002
- India
| | - Niyaz A. Mir
- Solid State and Structural Chemistry Unit
- Indian Institute of Science
- Bangalore-560012
- India
| | - Saima Sultana
- Department of Chemistry
- Aligarh Muslim University
- Aligarh-202002
- India
| | - Suhail Sabir
- Department of Chemistry
- Aligarh Muslim University
- Aligarh-202002
- India
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16
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Wang H, Yuan X, Wu Y, Chen X, Leng L, Zeng G. Photodeposition of metal sulfides on titanium metal–organic frameworks for excellent visible-light-driven photocatalytic Cr(vi) reduction. RSC Adv 2015. [DOI: 10.1039/c5ra01283j] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
A series of metal sulfides has been used to sensitize titanium metal–organic frameworks to form heterostructures through a facile photodeposition strategy.
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Affiliation(s)
- Hou Wang
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- PR China
- Key Laboratory of Environment Biology and Pollution Control
| | - Xingzhong Yuan
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- PR China
- Key Laboratory of Environment Biology and Pollution Control
| | - Yan Wu
- College of Environment and Energy
- South China University of Technology
- Guangzhou 510006
- PR China
| | - Xiaohong Chen
- School of Business
- Central South University
- Changsha 410083
- PR China
| | - Lijian Leng
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- PR China
- Key Laboratory of Environment Biology and Pollution Control
| | - Guangming Zeng
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- PR China
- Key Laboratory of Environment Biology and Pollution Control
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