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Bharath G, Hai A, Kiruthiga T, Rambabu K, Sabri MA, Park J, Choi MY, Banat F, Haija MA. Fabrication of Ru-CoFe 2O 4/RGO hierarchical nanostructures for high-performance photoelectrodes to reduce hazards Cr(VI) into Cr(III) coupled with anodic oxidation of phenols. CHEMOSPHERE 2022; 299:134439. [PMID: 35351477 DOI: 10.1016/j.chemosphere.2022.134439] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/16/2022] [Accepted: 03/23/2022] [Indexed: 06/14/2023]
Abstract
Dual-functional photo (electro)catalysis (PEC) is a key strategy for removing coexisting heavy metals and phenolic compounds from wastewater treatment systems. To design a PEC cell, it is crucial to use chemically stable and cost-effective bifunctional photocatalysts. The present study shows that ruthenium metallic nanoparticles decorated with CoFe2O4/RGO (Ru-CoFe2O4/RGO) are effective bifunctional photoelectrodes for the reduction of Cr(VI) ions. Ru-CoFe2O4/RGO achieves a maximum Cr(VI) reduction rate of 99% at 30 min under visible light irradiation, which is much higher than previously reported catalysts. Moreover, PEC Cr(VI) reduction rate is also tuned by adding varying concentration of phenol. A mechanism for the concurrent removal of Cr(VI) and phenol has been revealed over a bifunctional Ru-CoFe2O4/RGO catalyst. A number of key conclusions emerged from this study, demonstrating the dual role of phenol during Cr(VI) reduction by PEC. Anodic oxidation of phenol produces the enormous H+ ion, which appears to be a key component of Cr(VI) reduction. Additionally, phenolic molecules serve as hole (h+) scavengers that reduce e-/h+ recombination, thus enhancing the reduction rate of Cr(VI). Therefore, the Ru-CoFe2O4/RGO photoelectrode exhibits a promising capability of reducing both heavy metals and phenolic compounds simultaneously in wastewater.
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Affiliation(s)
- G Bharath
- Department of Chemical Engineering, Khalifa University, P.O. Box, 127788, Abu Dhabi, United Arab Emirates.
| | - Abdul Hai
- Department of Chemical Engineering, Khalifa University, P.O. Box, 127788, Abu Dhabi, United Arab Emirates
| | - T Kiruthiga
- Centre for Nanoscience and Technology, Anna University, Chennai, 600025, India
| | - K Rambabu
- Department of Chemical Engineering, Khalifa University, P.O. Box, 127788, Abu Dhabi, United Arab Emirates
| | - Muhammad Ashraf Sabri
- Department of Chemical Engineering, Khalifa University, P.O. Box, 127788, Abu Dhabi, United Arab Emirates
| | - Juhyeon Park
- Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Myong Yong Choi
- Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Fawzi Banat
- Department of Chemical Engineering, Khalifa University, P.O. Box, 127788, Abu Dhabi, United Arab Emirates.
| | - Mohammad Abu Haija
- Department of Chemistry, Khalifa University, P.O. Box, 127788, Abu Dhabi, United Arab Emirates.
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Jin S, Yang X, Tao R, Fang W, Jin Z, Li F, Xu L. A fully printed organic-inorganic metal halide perovskite photocathode for photoelectrochemical reduction of Cr(VI) in aqueous solution. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109499] [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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Wu W, Tan Z, Chen X, Chen X, Cheng L, Wu H, Li P, Zhang Z. Carnation-like Morphology of BiVO4-7 Enables Sensitive Photoelectrochemical Determination of Cr(VI) in the Food and Environment. BIOSENSORS 2022; 12:bios12020130. [PMID: 35200390 PMCID: PMC8870108 DOI: 10.3390/bios12020130] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 02/15/2022] [Accepted: 02/16/2022] [Indexed: 12/26/2022]
Abstract
Hexavalent chromium, namely, Cr(VI), is a significant threat to ecological and food safety. Current detection methods are not sensitive to Cr(VI). A photoelectrochemical (PEC) sensor based on bismuth vanadate (BiVO4) was developed for sensitive detection of Cr(VI). First, BiVO4-X (X: the pH of the reaction precursor solution) was synthesized using a facile surfactant-free hydrothermal method. The BiVO4-X morphology was well controlled according to pH values, showing rock-like (X = 1), wrinkled bark-like (X = 4), carnation-like (X = 7), and the collapsed sheet-like morphologies (X = 9, 12). BiVO4-7 exhibited excellent photoelectric performance due to a proper band structure under visible light and a large specific surface area. Then, BiVO4-7 was used to construct a PEC sensor to detect Cr(VI), which was demonstrated to have a low detection limit (10 nM) and wide detection range (2–210 μM). The BiVO4-7 PEC sensor had a stable output signal, as well as excellent reproducibility, repeatability, and selectivity. We used the BiVO4-7 PEC sensor to detect Cr(VI) in real environmental and food samples, resulting in a satisfactory recovery of 90.3–103.0%, as determined by comparison with results obtained using a spectrophotometric method. The BiVO4-7 PEC sensor is promising for practical application to heavy metal detection in the food and environment.
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Affiliation(s)
- Wenqin Wu
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture and Rural Affairs, National Reference Lab for Biotoxin Test, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (W.W.); (Z.T.); (X.C.); (X.C.); (L.C.); (P.L.)
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Zhao Tan
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture and Rural Affairs, National Reference Lab for Biotoxin Test, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (W.W.); (Z.T.); (X.C.); (X.C.); (L.C.); (P.L.)
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China;
| | - Xiao Chen
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture and Rural Affairs, National Reference Lab for Biotoxin Test, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (W.W.); (Z.T.); (X.C.); (X.C.); (L.C.); (P.L.)
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China;
| | - Xiaomei Chen
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture and Rural Affairs, National Reference Lab for Biotoxin Test, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (W.W.); (Z.T.); (X.C.); (X.C.); (L.C.); (P.L.)
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Ling Cheng
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture and Rural Affairs, National Reference Lab for Biotoxin Test, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (W.W.); (Z.T.); (X.C.); (X.C.); (L.C.); (P.L.)
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Huimin Wu
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China;
| | - Peiwu Li
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture and Rural Affairs, National Reference Lab for Biotoxin Test, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (W.W.); (Z.T.); (X.C.); (X.C.); (L.C.); (P.L.)
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Zhaowei Zhang
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture and Rural Affairs, National Reference Lab for Biotoxin Test, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (W.W.); (Z.T.); (X.C.); (X.C.); (L.C.); (P.L.)
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
- Correspondence: ; Tel.: +86-27-86711839
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Baishnisha A, Divakaran K, Balakumar V, Sasirekha V, Meenakshi C, Kannan RS. In-situ synthesis of CN@La(OH)3 nanocomposite for improved the charge separation and enhanced the photocatalytic activity towards Cr(VI) reduction under visible light. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY 2021. [DOI: 10.1016/j.jpap.2021.100048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Yang L, Hu W, Chang Z, Liu T, Fang D, Shao P, Shi H, Luo X. Electrochemical recovery and high value-added reutilization of heavy metal ions from wastewater: Recent advances and future trends. ENVIRONMENT INTERNATIONAL 2021; 152:106512. [PMID: 33756431 DOI: 10.1016/j.envint.2021.106512] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/04/2021] [Accepted: 03/06/2021] [Indexed: 06/12/2023]
Abstract
Wastewater treatment for heavy metals is currently transitioning from pollution remediation towards resource recovery. As a controllable and environment-friendly method, electrochemical technologies have recently gained significant attention. However, there is a lack of systematic and goal oriented summarize of electrochemical metal recovery techniques, which has inhibited the optimized application of these methods. This review aims at recent advances in electrochemical metal recovery techniques, by comparing different electrochemical recovery methods, attempts to target recycling heavy metal resources with minimize energy consumption, boost recovery efficiency and realize the commercial application. In this review, different electrochemical recovery methods (including E-adsorption recovery, E-oxidation recovery, E-reduction recovery, and E-precipitation recovery) for recovering heavy metals are introduced, followed an analysis of their corresponding mechanisms, influencing factors, and recovery efficiencies. In addition, the mass transfer efficiency can be promoted further through optimizing electrodes and reactors, and multiple technologies (photo-electrochemical and sono-electrochemical) could to be used synergistically improve recovery efficiencies. Finally, the most promising directions for electrochemical recovery of heavy metals are discussed along with the challenges and future opportunities of electrochemical technology in recycling heavy metals from wastewater.
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Affiliation(s)
- Liming Yang
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR China; Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Wenbin Hu
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR China; Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Ziwen Chang
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR China; Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Tian Liu
- Faculty of Agriculture, Life, and Environmental Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Difan Fang
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR China; Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Penghui Shao
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR China; Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Hui Shi
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR China; Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Xubiao Luo
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR China; Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China.
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Ifthikar J, Ibran Shahib I, Jawad A, Gendy EA, Wang S, Wu B, Chen Z, Chen Z. The excursion covered for the elimination of chromate by exploring the coordination mechanisms between chromium species and various functional groups. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213868] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Wang P, Li M, Song T, Yang P, Gao G. WO 3-x horizontally-grown on TiO 2(B) nanosheets for enhanced photo- and electro-chemical activity. NANOTECHNOLOGY 2020; 31:425605. [PMID: 32516758 DOI: 10.1088/1361-6528/ab9aef] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
WO3-x was deposited on TiO2(B) nanosheets prepared using TiCl4 to form layered heterostructures via a two-step solvothermal synthesis, in which the horizontal growth of WO3-x on TiO2(B) nanosheets was carried out using WCl6 and ascorbic acid as a reducer. Optimized preparation conditions allowed WO3-x/TiO2(B) layered heterostructures to be formed. The photo- and electro-chemical properties of layered heterostructures depended strongly on the amount of WO3-x. The WO3-x/TiO2(B) heterostructures demonstrated perfect catalytic performance in full solar-spectrum light and a fast degradation effect for dye and organic colorless pollutant. All target chemicals were degraded within 10 min using WO3-x/TiO2(B) samples as a photo-catalyst in the full solar-spectrum. The photo-assisted production kinetic of Cr(VI) ions were tested. The results indicate that the reproduction rate of Cr(VI) ions using WO3-x/TiO2(B) sample is three times higher than the initial TiO2 nanosheets. The result of the photo current and Mott-Shottky curve indicates that enhanced catalysis activity is ascribed to the surface of the metastable TiO2(B) with Ti3+ defects and oxygen vacancies as active sites for photocatalytic reaction. In addition, the loading of WO3-x greatly broadened the light absorption range of TiO2(B), meaning that the product responded in the full solar spectrum.
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Affiliation(s)
- Peng Wang
- School of Material Science and Engineering, University of Jinan, Jinan 250022, People's Republic of China
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Semiconductor Electrode Materials Applied in Photoelectrocatalytic Wastewater Treatment—an Overview. Catalysts 2020. [DOI: 10.3390/catal10040439] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Industrial sources of environmental pollution generate huge amounts of industrial wastewater containing various recalcitrant organic and inorganic pollutants that are hazardous to the environment. On the other hand, industrial wastewater can be regarded as a prospective source of fresh water, energy, and valuable raw materials. Conventional sewage treatment systems are often not efficient enough for the complete degradation of pollutants and they are characterized by high energy consumption. Moreover, the chemical energy that is stored in the wastewater is wasted. A solution to these problems is an application of photoelectrocatalytic treatment methods, especially when they are coupled with energy generation. The paper presents a general overview of the semiconductor materials applied as photoelectrodes in the treatment of various pollutants. The fundamentals of photoelectrocatalytic reactions and the mechanism of pollutants treatment as well as parameters affecting the treatment process are presented. Examples of different semiconductor photoelectrodes that are applied in treatment processes are described in order to present the strengths and weaknesses of the photoelectrocatalytic treatment of industrial wastewater. This overview is an addition to the existing knowledge with a particular focus on the main experimental conditions employed in the photoelectrocatalytic degradation of various pollutants with the application of semiconductor photoelectrodes.
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