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Ge T, Jiang Z, Shen L, Li J, Lu Z, Zhang Y, Wang F. Synthesis and application of Fe3O4/FeWO4 composite as an efficient and magnetically recoverable visible light-driven photocatalyst for the reduction of Cr(VI). Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118401] [Citation(s) in RCA: 72] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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52
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Zhu Y, Deng F, Qiu S, Ma F, Zheng Y, Lian R. Enhanced electro-Fenton degradation of sulfonamides using the N, S co-doped cathode: Mechanism for H 2O 2 formation and pollutants decay. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123950. [PMID: 33264994 DOI: 10.1016/j.jhazmat.2020.123950] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/26/2020] [Accepted: 09/01/2020] [Indexed: 06/12/2023]
Abstract
Facing low reactivity/selectivity of oxygen reduction reaction (ORR) in electro-Fenton (EF), N, S atoms were introduced into carbon-based cathode. "End-on" O2 adsorption was achieved by adjusting electronic nature via N doping, while *OOH binding capability was tuned by spin density variation via S doping. Results showed the optimized N, S co-doped cathode presented a 42.47% improvement of H2O2 accumulation (7.95 ± 0.02 mg L-1 cm-2). According to density functional theory (DFT), N, S co-doped structure favored the "end-on" O2 adsorption as adsorption energy dropped to - 2.24 eV. Moreover, O-O/C-O bond lengths variation proved a possibility for *OOH desorption. The elaborated cathode was used in EF for sulfonamides (SAs) decay. A 100% removal rate of sulfadiazine (SDZ), sulfathiazole (STZ) and sulfadimethoxine (SDM) was achieved within 60 min, among which SDZ tended to be degraded easily. Because the absolute hardness (η) of those pollutants is ranked as follows: ηSDM> ηSTZ> ηSDZ. Degradation pathways were proposed based on the detected byproducts, along with toxicity was evaluated by ecological structure-activity relationship (ECOSAR) program. Results showed that toxic intermediates generated were reduced or even disappeared. EF with N, S co-doped cathode provides a promising process for antibiotics wastewater treatment.
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Affiliation(s)
- Yingshi Zhu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Fengxia Deng
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Shan Qiu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China.
| | - Fang Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China.
| | - Yanshi Zheng
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Ruqian Lian
- Key Laboratory of Physics and Technology for Advanced Batteries, College of Physics, Jilin University, Changchun 130012, PR China
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Zhao W, Li Y, Zhao P, Zhang L, Dai B, Huang H, Zhou J, Zhu Y, Ma K, Leung DYC. Insights into the photocatalysis mechanism of the novel 2D/3D Z-Scheme g-C 3N 4/SnS 2 heterojunction photocatalysts with excellent photocatalytic performances. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123711. [PMID: 33254755 DOI: 10.1016/j.jhazmat.2020.123711] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 08/10/2020] [Accepted: 08/11/2020] [Indexed: 06/12/2023]
Abstract
A novel 2D/3D Z-scheme g-C3N4/SnS2 photocatalyst was successfully fabricated via self-assembly forming 3D flower-like SnS2 microspheres on the surface of the 2D g-C3N4 nanosheets. The photocatalytic performances of the samples were systematically explored through catalytic reduction of Cr6+ and oxidation of Bisphenol S (BPS) under the illumination of visible light, and the photocatalytic degradation pathway of BPS was also proposed based on the degradation products confirmed by GCMS. Among the as-prepared samples, 0.4-g-C3N4/SnS2 exhibited the most efficient photocatalytic performances, and the apparent quantum efficiency (QE) for the removal of Cr6+ could achieve 30.3 %, which is 2.8 times higher than that of the SnS2. The enhancing photocatalytic activities originated from the efficient interfacial charge migration and separation obtained in g-C3N4/SnS2, which was firstly verified via the photoluminescence spectra, time-resolved photoluminescence spectra and photoelectrochemical characterizations. Importantly, the DFT calculated shows that the band distribution of the g-C3N4/SnS2 sample is staggered near the forbidden, which can facilitate the efficient interfacial charge migration and separation as well as result in the improvement of the catalytic activity. Finally, we put forward a more reasonable Z-scheme charge transfer mechanism, it was verified by analysing the results of free radical scavenging tests, EPR experiments and theoretical calculations.
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Affiliation(s)
- Wei Zhao
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian, China; Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China; School of Materials Engineering, Changshu Institute of Technology, Changshu, China
| | - Yajuan Li
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian, China
| | - Pushu Zhao
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian, China
| | - Lili Zhang
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian, China
| | - Benlin Dai
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian, China.
| | - Haibao Huang
- School of Environmental Science and Engineering, Sun Yat-Sen University, China
| | - Jianli Zhou
- Harbin Institute of Technology, Shenzhen, China.
| | - Yukun Zhu
- School of Environmental Science and Engineering, Qingdao University, Qingdao, China
| | - Kuirong Ma
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian, China
| | - Dennis Y C Leung
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China.
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Tao Q, Bi J, Huang X, Wei R, Wang T, Zhou Y, Hao H. Fabrication, application, optimization and working mechanism of Fe 2O 3 and its composites for contaminants elimination from wastewater. CHEMOSPHERE 2021; 263:127889. [PMID: 32828053 DOI: 10.1016/j.chemosphere.2020.127889] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/20/2020] [Accepted: 07/31/2020] [Indexed: 06/11/2023]
Abstract
Fe2O3 and its composites have been extensively investigated and employed for the remediation of contaminated water with the characteristics of low cost, outstanding chemical stability, high efficiency of visible light utilization, excellent magnetic ability and abundant active sites for adsorption and degradation. In this review, the potentials of Fe2O3 in water remediation were discussed and summarized in detail. Firstly, various synthesis methods of Fe2O3 and its composites were reviewed and compared. Based on the structures and characteristics of the obtained materials, their applications and related mechanisms in pollutants removal were surveyed and discussed. Furthermore, several strategies for optimizing the remediation processes, including dispersion, immobilization, nano/micromotor construction and simultaneous decontamination, were also highlighted and discussed. Finally, recommendations for further work in the development of novel Fe2O3-related materials and its practical applications were proposed.
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Affiliation(s)
- Qingqing Tao
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Jingtao Bi
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Xin Huang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Rongli Wei
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Ting Wang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Yanan Zhou
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China; College of Chemical Engineering, North China University of Science and Technology, Tangshan, 063210, China.
| | - Hongxun Hao
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China; Co-Innovation Center of Chemical Science and Engineering, Tianjin, 300072, China.
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55
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Zheng Y, Hu X, Deng F, Li J, Dionysiou DD, Luo X. Enhanced photocatalytic oxidizing ability of Zn1-xIn2x/3S solid solution via band structure by composition regulation. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117726] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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56
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Shi Y, Li J, Wan D, Huang J, Liu Y. Peroxymonosulfate-enhanced photocatalysis by carbonyl-modified g-C 3N 4 for effective degradation of the tetracycline hydrochloride. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 749:142313. [PMID: 33370880 DOI: 10.1016/j.scitotenv.2020.142313] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 08/15/2020] [Accepted: 09/07/2020] [Indexed: 06/12/2023]
Abstract
In this work, carbonyl-modified g-C3N4 (CO-C3N4) is prepared through one-step calcination of the melamine-oxalic acid aggregates. The visible light-assisted photocatalytic degradation efficiency of the tetracycline hydrochloride (TCH) for CO-C3N4 is significantly enhanced by introducing the peroxymonosulfate (PMS), and the apparent rate constant is greatly increased from 0.01966 min-1 in CO-C3N4/vis system to 0.07688 min-1 in CO-C3N4/PMS/vis system. It is found that carbonyl for CO-C3N4 might offer possible reactive sites for PMS activation and collection sites of photo-generated electrons, greatly accelerating carrier's separation for PMS activation. The favorable conditions, such as the higher catalyst dosage, higher PMS amount and alkaline pH, contribute to TCH degradation. The deleterious effects of co-existing anions on the TCH degradation efficiency are ranked in a decline: H2PO4- > SO42- > HCO3- > NO3- > Cl-, and it may be affected by the type and amounts of anions and active radicals generated. The radical trapping tests and electron spin resonance (ESR) detection display that the O2-, h+, 1O2, OH and SO4- all contribute to TCH degradation. Meanwhile, possible degradation mechanism, intermediates and degradation pathway of TCH are revealed in CO-C3N4/PMS/vis system. This study will offer a new insight for constructing PMS activation with carbonyl modified g-C3N4 photocatalysis system to achieve effective treatment of organic wastewater.
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Affiliation(s)
- Yahui Shi
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Jinsong Li
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Dongjin Wan
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China.
| | - Jinhui Huang
- College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Yongde Liu
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
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57
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Luo J, Chen J, Chen X, Ning X, Zhan L, Zhou X. Construction of cerium oxide nanoparticles immobilized on the surface of zinc vanadate nanoflowers for accelerated photocatalytic degradation of tetracycline under visible light irradiation. J Colloid Interface Sci 2020; 587:831-844. [PMID: 33248700 DOI: 10.1016/j.jcis.2020.11.044] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 11/06/2020] [Accepted: 11/09/2020] [Indexed: 11/18/2022]
Abstract
Construction of Z-scheme heterojunction has been deemed to be an effective and promising approach to boost the photocatalytic activity on account of accelerating the separation efficiency of the photogenerated carriers and maintaining the strong redox ability. Herein, an attractive CeO2/Zn3V2O8 Z-scheme heterojunction photocatalyst was rationally constructed by zero-dimensional (0D) CeO2 nanoparticles immobilized on the surface of three-dimensional (3D) Zn3V2O8 nanoflowers using a simple mixing method, and applied to the photocatalytic degradation of tetracycline (TC) under visible light irradiation. As expected, it was observed that the prepared CeO2/Zn3V2O8 hybrid illustrated significantly boosted the photocatalytic activity for the elimination of TC compared to pure Zn3V2O8. More importantly, the optimized CeO2(40 wt%)/Zn3V2O8 hybrid owned the largest elimination rate of TC with 1.13 × 10-2 min-1, which was around 8.1 and 3.8 times as high as single CeO2 (0.14 × 10-2 min-1) and Zn3V2O8 (0.30 × 10-2 min-1), respectively. The appreciable performance improvement was mainly ascribed to the formation of Z-scheme heterojunction between CeO2 and Zn3V2O8, facilitating the transfer rate of photogenerated carriers and remaining the high reducibility of photoexcited electrons in CeO2 and strong oxidizability of photoinduced holes in Zn3V2O8. Active species capture experiments and electron spin resonance spectra showed that superoxide radicals and holes were the main active species for TC degradation. Besides, the possible degradation pathways of TC were speculated by identifying degradation intermediates, and the reasonable degradation mechanism including migration and transport behaviors of charge carriers and generation processes of reactive species were revealed in depth. This investigation enriches Zn3V2O8-based Z-scheme heterojunction photocatalytic system and offers a new inspiration for the construction and fabrication of high-efficiency Z-scheme heterojunction photocatalysts to remove the antibiotics from wastewater.
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Affiliation(s)
- Jin Luo
- School of Chemistry and Chemical Engineering, Research Center for Clean Energy Materials Chemical Engineering Technology of Guangdong, Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Lingnan Normal University, Zhanjiang 524048, China.
| | - Jiayi Chen
- School of Chemistry and Chemical Engineering, Research Center for Clean Energy Materials Chemical Engineering Technology of Guangdong, Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Lingnan Normal University, Zhanjiang 524048, China
| | - Xiaoting Chen
- School of Chemistry and Chemical Engineering, Research Center for Clean Energy Materials Chemical Engineering Technology of Guangdong, Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Lingnan Normal University, Zhanjiang 524048, China
| | - Xiaomei Ning
- School of Chemistry and Chemical Engineering, Research Center for Clean Energy Materials Chemical Engineering Technology of Guangdong, Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Lingnan Normal University, Zhanjiang 524048, China
| | - Liang Zhan
- School of Chemistry and Chemical Engineering, Research Center for Clean Energy Materials Chemical Engineering Technology of Guangdong, Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Lingnan Normal University, Zhanjiang 524048, China
| | - Xiaosong Zhou
- School of Chemistry and Chemical Engineering, Research Center for Clean Energy Materials Chemical Engineering Technology of Guangdong, Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Lingnan Normal University, Zhanjiang 524048, China.
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58
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Controlled growth of AgI nanoparticles on hollow WO3 hierarchical structures to act as Z-scheme photocatalyst for visible-light photocatalysis. J Colloid Interface Sci 2020; 579:754-765. [DOI: 10.1016/j.jcis.2020.06.126] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 06/29/2020] [Accepted: 06/30/2020] [Indexed: 01/14/2023]
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59
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Designing AgFeO2-graphene/Cu2(BTC)3 MOF heterojunction photocatalysts for enhanced treatment of pharmaceutical wastewater under sunlight. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112746] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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60
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Li Q, Li FT. Recent advances in surface and interface design of photocatalysts for the degradation of volatile organic compounds. Adv Colloid Interface Sci 2020; 284:102275. [PMID: 32987294 DOI: 10.1016/j.cis.2020.102275] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 09/18/2020] [Accepted: 09/19/2020] [Indexed: 02/03/2023]
Abstract
Photocatalysis has attracted wide attention in eliminating volatile organic compounds (VOCs). This paper pays attention to the relationship between structure and performance of photocatalysts based on the fact that catalytic reactions arise on the surface of catalysts and the interface structure of photocatalysts plays key role in transfer efficiency of charges carriers. This review summarizes various surface/interface designs including unsaturated coordination such as oxygen vacancies, surface halogenations, and heterojunctions, homojunctions, facets, etc., as well as the application in photocatalytic degradation of VOCs. This paper reviews the influence of surface and interface properties of materials on VOCs molecules, effective strategies to promote the decomposition of VOCs from the perspectives of VOCs activation, reaction barrier etc., and presents various methods of photocatalyst design appropriately. The degradation path of highly toxic benzene VOCs are also summarized. In addition, the possible problems and suggestions for photocatalytic degradation of VOCs are proposed.
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Affiliation(s)
- Qi Li
- College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Fa-Tang Li
- College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China; School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China.
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61
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Zhang X, Zhou H, Cao W, Chen C, Jiang C, Wang Y. Preparation and mechanism investigation of Bi2WO6/UiO-66-NH2 Z-scheme heterojunction with enhanced visible light catalytic activity. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.108162] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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