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Zhou B, Tan P, Yang L, Zhang Y, Tan X, Pan J. Assembly of direct Z-scheme ZnIn2S4/BiVO4 composite for enhanced photodegradation of tetracycline hydrochloride. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Zhu B, Jiang G, Kong C, Sun J, Liu F, Wang Y, Zhao C, Liu C. Photocatalytic degradation of organic pollutants in water by N-doping ZnS with Zn vacancy: enhancement mechanism of visible light response and electron flow promotion. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:58716-58729. [PMID: 35366728 DOI: 10.1007/s11356-022-19852-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 03/18/2022] [Indexed: 06/14/2023]
Abstract
In order to improve the visible light response, N-doping ZnS (N-ZnS) nanospheres with Zn vacancy and porous surface were prepared by a simple one-pot hydrothermal method. Characterizations and density functional theory simulations showed excellent visible light response of N-ZnS. N-doping introduced impurity energy levels, which led to orbital hybridization and changed the original dipole moment. The presence of ortho Zn vacancy (O-Znv) can effectively reduce e--h+ recombination and photocorrosion. Furthermore, O-Znv caused lattice distortion (twisted the -S-Zn-N-(O-Znv)-S-Zn-S- chemical bond chain), resulting in "vacancy effect" to accelerate e- flow. Under visible light, the photocatalytic degradation efficiency of tetracycline (TC) and 2,4-dichlorophenol (2,4-DCP) was 90.31% and 60.84%, respectively. TOC degradation efficiency was 31.4% and 25.6%, respectively. Combined with Fukui index and LC-MS methods, it was found that TC and 2,4-DCP were degraded under the constant attack of active substances such as ·OH. This work can provide a reference for the application of catalytic materials in the field of visible light photocatalysis.
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Affiliation(s)
- Benjie Zhu
- College of Chemical Engineering, China University of Petroleum, Qingdao, 266580, China
| | - Guofei Jiang
- College of Chemical Engineering, China University of Petroleum, Qingdao, 266580, China
| | - Can Kong
- College of Chemical Engineering, China University of Petroleum, Qingdao, 266580, China
| | - Junzhi Sun
- College of Chemical Engineering, China University of Petroleum, Qingdao, 266580, China
| | - Fang Liu
- College of Chemical Engineering, China University of Petroleum, Qingdao, 266580, China.
- State Key Laboratory of Pollution Control and Treatment in Petroleum and Petrochemical Industry, State Key Laboratory of Heavy Oil Processing, Beijing, China.
| | - Yongqiang Wang
- College of Chemical Engineering, China University of Petroleum, Qingdao, 266580, China
- State Key Laboratory of Pollution Control and Treatment in Petroleum and Petrochemical Industry, State Key Laboratory of Heavy Oil Processing, Beijing, China
| | - Chaocheng Zhao
- College of Chemical Engineering, China University of Petroleum, Qingdao, 266580, China
- State Key Laboratory of Pollution Control and Treatment in Petroleum and Petrochemical Industry, State Key Laboratory of Heavy Oil Processing, Beijing, China
| | - Chunshuang Liu
- College of Chemical Engineering, China University of Petroleum, Qingdao, 266580, China
- State Key Laboratory of Pollution Control and Treatment in Petroleum and Petrochemical Industry, State Key Laboratory of Heavy Oil Processing, Beijing, China
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Facile Synthesis of BiVO 4@ZIF-8 Composite with Heterojunction Structure for Photocatalytic Wastewater Treatment. MATERIALS 2021; 14:ma14237424. [PMID: 34885579 PMCID: PMC8658979 DOI: 10.3390/ma14237424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 11/21/2021] [Accepted: 11/29/2021] [Indexed: 12/04/2022]
Abstract
Water pollution has always been a serious problem across the world; therefore, facile pollutant degradation via light irradiation has been an attractive issue in the field of environmental protection. In this study, a type of Zn-based metal–organic framework (ZIF−8)-wrapped BiVO4 nanorod (BiVO4@ZIF−8) with high efficiency for photocatalytic wastewater treatment was synthesized through a two-step hydrothermal method. The heterojunction structure of BiVO4@ZIF−8 was confirmed by morphology characterization. Due to the introduction of mesoporous ZIF−8, the specific surface area reached up to 304.5 m2/g, which was hundreds of times larger than that of pure BiVO4 nanorods. Furthermore, the band gap of BiVO4@ZIF−8 was narrowed down to 2.35 eV, which enabled its more efficient utilization of visible light. After irradiation under visible light for about 40 min, about 80% of rhodamine B (RhB) was degraded, which was much faster than using pure BiVO4 or other BiVO4-based photocatalysts. The synergistic photocatalysis mechanism of BiVO4@ZIF−8 is also discussed. This study might offer new pathways for effective degradation of wastewater through facile design of novel photocatalysts.
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