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Jiang R, Zhong D, Xu Y, Chang H, He Y, Zhang J, Liao P. Chitosan derived N-doped carbon anchored Co 3O 4-doped MoS 2 nanosheets as an efficient peroxymonosulfate activator for degradation of dyes. Int J Biol Macromol 2024; 265:130519. [PMID: 38553393 DOI: 10.1016/j.ijbiomac.2024.130519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 02/23/2024] [Accepted: 02/27/2024] [Indexed: 04/18/2024]
Abstract
Peroxymonosulfate (PMS), which is dominated by non-free radical pathway, has a good removal effect on organic pollutants in complex water matrices. In this article, a biodegradable cobalt-based catalyst (Co3O4/MoS2@NCS) was synthesized by a simple hydrothermal method with chitosan (CS) as nitrogen‑carbon precursor and doped with Cobaltic‑cobaltous oxide (Co3O4) and Molybdenum disulfide (MoS2), and was used to activate PMS to degrade dye wastewater. Electrochemical tests showed that Co3O4/MoS2@NCS exhibited higher current density and cycling area than MoS2@NCS and MoS2. In the Co3O4/MoS2@NCS/PMS system, the degradation rate of 30 mg·L-1 rhodamine B (RhB) reached 97.75 % within 5 min, and kept as high as 94.34 % after 5 cycles. Its rate constant was 1.91 and 8.37 times that of MoS2@NCS/PMS and MoS2/PMS, respectively. It had good complex background matrices and acid-base anti-interference ability, and had good universality and reusability. The degradation rate of methyl orange (MO) and methylene blue (MB) were more than 91 % within 5 min at pH 4.8. The experimental results demonstrated that MoS2-modified CS as a carrier exposed a large number of active sites, which not only dispersed Co3O4 nanoparticles and improved the stability of the catalyst, but also provided abundant electron rich groups, and promoted the activation of PMS and the production of reactive oxygen species (ROS). PMS was effectively activated by catalytic sites (Co3+/Co2+, Mo4+/Mo5+/Mo6+, CO, pyridine N, pyrrole N, hydroxyl group and unsaturated sulfur), producing a large number of radicals that attack RhB molecules, causing chromophore cleavage, ring opening, and mineralization. Among them, non-free radical 1O2 was the main ROS for RhB degradation. This work is expected to provide a new idea for the design and synthesis of environmentally friendly and efficient MoS2-modified cobalt-based catalysts.
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Affiliation(s)
- Ran Jiang
- School of Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
| | - Dengjie Zhong
- School of Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China.
| | - Yunlan Xu
- School of Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
| | - Haixing Chang
- School of Resources & Environmental Science, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, Wuhan University, Wuhan 430079, China
| | - Yuanzhen He
- School of Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
| | - Jiayou Zhang
- School of Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
| | - Pengfei Liao
- School of Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
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2
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Sivaranjani PR, Subhiksha V, Okla MK, Janani B, Abdel-Maksoud MA, Al-Amri SS, Alaraidh IA, Alatar AA, Khan SS. Construction of p-n-p nano heterojunction through coupling La 2O 3, (BiO) 2CO 3 and Ag 3PO 4 for effective photocatalytic degradation of doxycycline: Insights into mechanism, pathway and intermediate toxicity evaluation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 345:123521. [PMID: 38331239 DOI: 10.1016/j.envpol.2024.123521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 02/04/2024] [Accepted: 02/05/2024] [Indexed: 02/10/2024]
Abstract
The present work is centred around the development of La2O3/(BiO)2CO3/Ag3PO4 (LBA), a p-n-p nano-heterojunction to photodegrade doxycycline under visible light irradiation. Here, ultrasonication assisted co-precipitation method was employed to synthesize the photocatalyst. The photocatalyst was characterized using different analysis such as SEM, TEM, elemental mapping, XRD, XPS, FTIR, Raman, BET, DRS, PL and EIS which confirmed the successful fabrication of LBA and their excellent ability to refrain the e-/h+ recombination owing to the construction of the heterojunction. LBA was found to degrade DOX by 91.75 % with the high mineralization of 87.23%. The impact of the reaction parameters influencing the photodegradation process including the concentration of the NCs and DOX, pH and the influence of the commonly present anions were studied. The stability and reusability of the LBA was assessed through subjecting it to four cycles of photodegradation of DOX. In addition, the recovered LBA was characterized through XPS and XRD analysis to confirm the particles stability and reusability. The active participation of the photogenerated charges and the reactive oxygen species were identified through the scavenging assay and ESR analysis. Further, GC-MS/MS analysis was performed to put forward a plausible photodegradation pathway. The toxicity of the end products as well as the intermediates was predicted through ECOSAR software.
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Affiliation(s)
- P R Sivaranjani
- Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India
| | - V Subhiksha
- Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India
| | - Mohammad K Okla
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - B Janani
- Nano-imaging and Spectroscopy Laboratory, Faculty of Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON, L1G 0C5, Canada
| | - Mostafa A Abdel-Maksoud
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Saud S Al-Amri
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Ibrahim A Alaraidh
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Abdulrahman A Alatar
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - S Sudheer Khan
- Department of Oral Medicine and Radiology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai, 600077, Tamil Nadu, India.
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3
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Tian N, Madani Z, Giannakis S, Isari AA, Arjmand M, Hasanvandian F, Noorisepehr M, Kakavandi B. Peroxymonosulfate assisted pesticide breakdown: Unveiling the potential of a novel S-scheme ZnO@CoFe 2O 4 photo-catalyst, anchored on activated carbon. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 334:122059. [PMID: 37390913 DOI: 10.1016/j.envpol.2023.122059] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 06/10/2023] [Accepted: 06/14/2023] [Indexed: 07/02/2023]
Abstract
A ternary hetero-junction was prepared by anchoring ZnO@CoFe2O4 (ZCF) on activated carbon (AC) and employed as a UV-assisted peroxymonosulfate (PMS) activator to boost the degradation of diazinon (DZN) pesticide. The structure, morphology, and optical properties of the ZCFAC hetero-junction were characterized through a series of techniques. The highest degradation efficiency of DZN (100% in 90 min) was achieved by the PMS-mediated ZCFAC/UV system, superior to other single or binary catalytic systems due to the strong synergistic effect between ZCFAC, PMS, and UV. The operating reaction conditions, synergistic effects, and the possible pathways of DZN degradation were investigated and discussed. Optical analysis showed that the band-gap energy of the ZCFAC hetero-junction not only enhanced the absorption of UV light but also reduced the recombination of photo-induced electron/hole pairs. Both radical and non-radical species (HO•, SO4•-, O2•-, 1O2, and h+) took part in the photo-degradation of DZN, assessed by scavenging tests. It was found that AC as a carrier not only improved the catalytic activity of CF and ZnO nanoparticles and conferred high stability for the catalyst but also played a crucial role in accelerating the catalytic PMS activation mechanism. Moreover, the PMS-mediated ZCFAC/UV system showed good reusability, universality, and practical applicability potential. Overall, this work explored an efficient strategy for the best use of hetero-structure photo-catalysts towards PMS activation to achieve high performance in decontaminating organic compounds.
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Affiliation(s)
- Na Tian
- School of Environmental Studies, China University of Geosciences, Wuhan, 430074, PR China; Universidad Politécnica de Madrid, E.T.S. de Ingenieros de Caminos, Canales y Puertos, Departamento de Ingeniería Civil: Hidráulica, Energía y Medio Ambiente, Unidad Docente Ingeniería Sanitaria, C/ Profesor Aranguren, S/n, ES-28040, Madrid, Spain
| | - Zahra Madani
- Research Center for Health, Safety and Environment, Alborz University of Medical Sciences, Karaj, Iran; Department of Environmental Health Engineering, Alborz University of Medical Sciences, Karaj, Iran
| | - Stefanos Giannakis
- Universidad Politécnica de Madrid, E.T.S. de Ingenieros de Caminos, Canales y Puertos, Departamento de Ingeniería Civil: Hidráulica, Energía y Medio Ambiente, Unidad Docente Ingeniería Sanitaria, C/ Profesor Aranguren, S/n, ES-28040, Madrid, Spain
| | - Ali Akbar Isari
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Mohammad Arjmand
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Farzad Hasanvandian
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
| | - Mohammad Noorisepehr
- Research Center for Health, Safety and Environment, Alborz University of Medical Sciences, Karaj, Iran; Department of Environmental Health Engineering, Alborz University of Medical Sciences, Karaj, Iran
| | - Babak Kakavandi
- Research Center for Health, Safety and Environment, Alborz University of Medical Sciences, Karaj, Iran; Department of Environmental Health Engineering, Alborz University of Medical Sciences, Karaj, Iran.
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Sun Q, Hu X, Zhao Y, Zhang J, Sheng J. Construction of Co 3O 4 anchored on Bi 2MoO 6 microspheres for highly efficient photocatalytic peroxymonosulfate activation towards degradation of norfloxacin. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27674-y. [PMID: 37213017 DOI: 10.1007/s11356-023-27674-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 05/11/2023] [Indexed: 05/23/2023]
Abstract
Dissolved antibiotics have been a research subject due to their widespread presence and potential threats in drinking water treatment. To enhance the photocatalytic activity of Bi2MoO6 for the degradation of norfloxacin (NOR), the heterostructured Co3O4/Bi2MoO6 (CoBM) composites were synthesized by employing ZIF-67-derived Co3O4 on Bi2MoO6 microspheres. The as-synthesized resultant material 3-CoBM by 300 °C calcination was characterized by XRD, SEM, XPS, transient photocurrent techniques, and EIS. The photocatalytic performance was evaluated by monitoring different concentrations, NOR removal from aqueous solution. Compared with Bi2MoO6, 3-CoBM exhibited the better adsorption and elimination capacity of NOR due to the combined effect between peroxymonosulfate activation and photocatalytic reaction. The influences of catalyst dosage, PMS dosage, various interfering ions (Cl-, NO3-, HCO3-, and SO42-), pH value, and type of antibiotics for application removal were also invested. By activating PMS under visible-light irradiation, 84.95% of metronidazole (MNZ) can be degraded within 40 min, and NOR and tetracycline (TC) can be completely degraded using 3-CoBM. Degradation mechanism was elucidated by quenching tests in combination with EPR measurement, and the degree of activity of the active groups from strong to weak is h+, SO4-•, and •OH, respectively. The degradation products and conceivable degradation pathways of NOR were speculated by LC-MS. In combination of excellent peroxymonosulfate activation and highly enhanced photocatalytic performance, this newly Co3O4/Bi2MoO6 catalyst might be a promising candidate for degrading emerging antibiotic contamination in wastewater.
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Affiliation(s)
- Qing Sun
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Xiaofang Hu
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Yingjie Zhao
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Jian Zhang
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Jiawei Sheng
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, China.
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5
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Ma Z, Li X, Fan G, Deng L, He Y. Construction of 3D sheet-packed hierarchical MoS 2/BiOBr heterostructures with remarkably enhanced photocatalytic performance for tetracycline and levofloxacin degradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:59737-59748. [PMID: 37016255 DOI: 10.1007/s11356-023-26740-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 03/27/2023] [Indexed: 05/10/2023]
Abstract
In this paper, MoS2 nanosheets were prepared and deposited on BiOBr microflowers through deposition-hydrothermal strategy. MoS2 exhibited a string of nanosheets with wrinkled layer outlook, and MoS2/BiOBr composites displayed a micro-flower morphology with the diameter of 2-3 μm. Visible-light harvesting performance was significantly improved in the region of 400-600 nm for MoS2/BiOBr. The obtained MoS2/BiOBr samples exhibited tremendous enhanced catalytic activity, which could degrade 92.96% of tetracycline and 90.31% of levofloxacin within 70 min. The photo-generated holes and ⋅OH radicals played the dominant roles in the whole photocatalytic decomposition process. Based on the analysis of DRS, BET, PL, and electrochemical results, the remarkably improved photocatalytic performance may be ascribed to the synergistic effect of strong visible-light harvesting ability, enhanced BET surface area, and faster separation or transfer efficiency of photo-generated charges.
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Affiliation(s)
- Zhanying Ma
- Department of Chemistry, Xianyang Normal University, Xianyang, 712000, China
| | - Xiaobo Li
- Department of Chemistry, Xianyang Normal University, Xianyang, 712000, China
| | - Guang Fan
- Department of Chemistry, Xianyang Normal University, Xianyang, 712000, China
| | - Lingjuan Deng
- Department of Chemistry, Xianyang Normal University, Xianyang, 712000, China
| | - Yangqing He
- Department of Applied Chemistry, Xi'an University of Technology, Xi'an, 710048, China.
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6
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Zhang J, Li Z, Lei Q, Zhong D, Ke Y, Liu W, Yang L. Significantly activated persulfate by novel carbon quantum dots-modified N-BiOCl for complete degradation of bisphenol-A under visible light irradiation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 870:161804. [PMID: 36731546 DOI: 10.1016/j.scitotenv.2023.161804] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 01/04/2023] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
The practical application of bismuth-based photocatalysts in the field of micropollutant photodegradation is limited due to their weak light absorption and rapid charge recombination. Herein, we have developed a novel carbon quantum dots-modified N-BiOCl (CDs-N-BiOCl) photocatalyst to activate persulfate (PS) for the complete elimination of endocrine-disruptor bisphenol A (BPA) under visible light irradiation. The photoelectric properties characterization shows that N atoms could replace Cl atoms or adsorb on Bi atoms to form local N 1s states in the BiOCl lattice, accompanied by the introduction of doping energy levels that shorten the electron migration distance. Meanwhile, the decorated CDs could effectively accept the photoinduced electrons from N-BiOCl conduction band to facilitate the charge separation. Thus, the 7%CDs-N-BiOCl (7CNB) nanocomposite synergistically activated PS realized rapid and effective degradation of BPA within 20 min (degradation efficiency and mineralization reached 100 % and 66.4 % respectively). Moreover, the 7CNB/PS system displayed favorable adaptability, durability, and interference resistance. Furthermore, the biotoxicity experiments demonstrated that the photodegradation intermediates promoted the growth of Escherichia coli which indicates its eco-friendliness for practical application. Finally, the electron transfer mechanism and the formation of reactive oxygen species in the photodegradation process were interpreted. In short, this work will present a promising strategy for bismuth-based photocatalysts to be used for the efficient treatment of real water bodies under visible light irradiation.
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Affiliation(s)
- Jianqiao Zhang
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; Luohu District Urban Management and Comprehensive Law Enforcement Bureau, Shenzhen 518003, China
| | - Zhiyang Li
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China
| | - Qian Lei
- China Railway NO.1 GROUP Co., LTD., Xi'an 710000, China
| | - Dan Zhong
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China
| | - YiXin Ke
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China
| | - WenJie Liu
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China
| | - Lei Yang
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China.
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Shen J, Shi A, Lu J, Lu X, Zhang H, Jiang Z. Optimized fabrication of Cu-doped ZnO/calcined CoFe‒LDH composite for efficient degradation of bisphenol a through synergistic visible-light photocatalysis and persulfate activation: Performance and mechanisms. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 323:121186. [PMID: 36773684 DOI: 10.1016/j.envpol.2023.121186] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 01/16/2023] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
A novel magnetically separable Cu/ZnO/CoFe‒CLDH composite, whose synthesis was optimized using the Taguchi approach, was optimally synthesized by hydrothermally coupling Cu-doped ZnO and calcined CoFe-LDH. The synthesized Cu/ZnO/CoFe‒CLDH was applied to construct a synergistic process of integrating visible-light photocatalysis (VPC) with persulfate activation (PSA) and to degrade bisphenol A (BPA). Various characterizations proved that Cu/ZnO/CoFe‒CLDH possessed excellent physicochemical, optoelectronic and magnetic properties, thereby enhancing the catalytic performance. The Cu/ZnO/CoFe‒CLDH composite achieved highly efficient BPA degradation during the synergistic VPC‒PSA process, and its reaction rate constant (0.74 h-1) was 6.17-, 4.11-, and 2.85-fold higher than that of Cu/ZnO, CoFe‒CLDH, and Cu/ZnO/CoFe‒CLDH (VPC only), respectively. Moreover, the effects of the catalyst dosage, initial pollutant concentration, solution pH, persulfate dosage and coexisting ions on BPA degradation were comprehensively investigated. Radical-trapping experiments revealed that the contributions of ·OH, SO4·‒, ·O2-, and 1O2 involved in BPA degradation. Based on the intermediates identified by LC/MS, the main BPA degradation pathways were determined, the overall trend of which reflects a decreasing ecotoxicity. This study verified the effectiveness of the synergistic VPC‒PSA process with Cu/ZnO/CoFe‒CLDH, which could be used as a new reference for removing organic micropollutants from water.
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Affiliation(s)
- Jyunhong Shen
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, Fujian, 350118, China
| | - Antong Shi
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, Fujian, 350118, China
| | - Jiahui Lu
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, Fujian, 350118, China
| | - Xiangtao Lu
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, Fujian, 350118, China
| | - Hongyu Zhang
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, Fujian, 350118, China
| | - Zhuwu Jiang
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, Fujian, 350118, China.
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Wei Q, Lu B, Yang Q, Shi C, Wei Y, Xu M, Zhang C, Yuan Y. MoS 2/Au Heterojunction Catalyst for SERS Monitoring of a Fenton-like Reaction. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1169. [PMID: 36770175 PMCID: PMC9920604 DOI: 10.3390/ma16031169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 01/18/2023] [Accepted: 01/27/2023] [Indexed: 06/18/2023]
Abstract
Fenton technology is one of advanced oxidation process (AOP) methods to treat wastewater through chemical oxidation. Due to the limitations of classical iron-based catalysts, it is still challenging to find suitable catalysts for Fenton-like reactions. Here, MoS2/Au heterojunctions were successfully synthesized by reduction of chloroauric acid in the solution of layered MoS2 prepared by hydrothermal method. As a model molecule, methylene blue (MB) was used as the species to be degraded to evaluate the performance of the catalyst. It was determined by UV-visible spectra that the optimal catalyst can be obtained when MoS2 (mg): HAuCl4 (wt. % mL) is 2:2. The Fenton-like reaction process was monitored by introducing highly sensitive surface enhanced Raman spectroscopy (SERS). The results show that MB can be degraded by 83% in the first 10 min of the reaction, indicating that MoS2/Au has good catalytic performance. In addition, as a fingerprint spectrum, SERS was used to preliminarily analyze the molecular structure changes during the degradation process. The result showed that C-N-C bond was easier to break than the C-S-C bond. NH2 group and the fused ring were destroyed at the comparable speed at the first 30 min. In terms of application applicability, it was showed that MB degradation had exceeded 95% at all the three pH values of 1.4, 5.0, and 11.1 after the reaction was carried out for 20 min. The test and analysis of the light environment showed that the catalytic efficiency was significantly improved in the natural light of the laboratory compared to dark conditions. The possible mechanism based on ·OH and ·O2- from ESR data was proposed. In addition, it was demonstrated to be a first-order reaction from the perspective of kinetics. This study made a positive contribution to broaden of the applicable conditions and scope of Fenton-like reaction catalysts. It is expected to be used as a non-iron catalyst in practical industrial applications. From the perspective of detection method, we expect to develop SERS as a powerful tool for the in situ monitoring of Fenton-like reactions, and to further deepen our understanding of the mechanism.
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Affiliation(s)
- Qian Wei
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Beibei Lu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Qing Yang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Can Shi
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Yulan Wei
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Minmin Xu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
- Suzhou Key Laboratory of Novel Semiconductor-Optoelectronics Materials and Devices, Soochow University, Suzhou 215123, China
| | - Chenjie Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Yaxian Yuan
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
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Wang M, Osella S, Brescia R, Liu Z, Gallego J, Cattelan M, Crisci M, Agnoli S, Gatti T. 2D MoS 2/BiOBr van der Waals heterojunctions by liquid-phase exfoliation as photoelectrocatalysts for hydrogen evolution. NANOSCALE 2023; 15:522-531. [PMID: 36511088 DOI: 10.1039/d2nr04970h] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
As a semiconductor used for the photocatalytic hydrogen evolution reaction (HER), BiOBr has received intensive attention in recent years. However, the high recombination of photoexcited charge carriers results in poor photocatalytic efficiency. The combination with other photoactive semiconductors might represent a valuable approach to deal with the intrinsic limitations of the material. Given that BiOBr has a 2D structure, we propose a simple liquid-phase exfoliation method to peel BiOBr microspheres into few-layer nanosheets. By tuning the weight ratio between the precursors, we prepare a series of 2D MoS2/BiOBr van der Waals (vdW) heterojunctions and study their behaviour as (photo)electrocatalysts for the HER, finding dramatic differences as a function of weight composition. Moreover, we found that pristine 2D BiOBr and the heterojunctions, with the exception of the 1% MoS2/BiOBr composition, undergo photocorrosion, with BiOBr being reduced to metallic Bi. These findings provide useful guidelines to design novel 2D material-based (photo)electrocatalysts for the production of sustainable fuels.
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Affiliation(s)
- Mengjiao Wang
- Institute of Physical Chemistry and Center for Materials Research (LaMa), Justus Liebig University, 35392 Giessen, Germany.
| | - Silvio Osella
- Chemical and Biological Systems Simulation Lab, Centre of New Technologies, University of Warsaw, 02097 Warsaw, Poland
| | - Rosaria Brescia
- Electron Microscopy Facility, Istituto Italiano di Tecnologia, Via Morego, 30, 16163 Genova, Italy
| | - Zheming Liu
- Nanochemistry Department, Istituto Italiano di Tecnologia, 16163 Genova, Italy
| | - Jaime Gallego
- Institute of Physical Chemistry and Center for Materials Research (LaMa), Justus Liebig University, 35392 Giessen, Germany.
| | - Mattia Cattelan
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Matteo Crisci
- Institute of Physical Chemistry and Center for Materials Research (LaMa), Justus Liebig University, 35392 Giessen, Germany.
| | - Stefano Agnoli
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Teresa Gatti
- Institute of Physical Chemistry and Center for Materials Research (LaMa), Justus Liebig University, 35392 Giessen, Germany.
- Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy.
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Fabrication of ternary nano-heterojunction via hierarchical deposition of α-Fe2O3 and β-La2S3 on cubic CoCr2O4 for enhanced photodegradation of doxycycline. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.11.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Yan R, Huang H, Wang HL, Chu S, Jiang WF. Facile in-situ construction of Z-scheme Bi6O5(OH)3(NO3)5·3H2O/Bi5O7I binary heterojunction composites for superior photocatalytic degradation of diverse persistent organic pollutants in water. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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12
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Su LL, Li RJ, Huang N, Zhu TT, Deng SH, Wang XX, Yang G, Zhang YZ, Long LL. The silicon active sites driven by oxygen vacancies in iron silicate for activating peroxymonosulfate. J Colloid Interface Sci 2022; 628:955-965. [PMID: 35964443 DOI: 10.1016/j.jcis.2022.08.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 08/03/2022] [Accepted: 08/04/2022] [Indexed: 10/15/2022]
Abstract
Most metal sites and some non-metallic sites such as carbon and nitrogen are usually considered to be traditional active sites during peroxymonosulfate (PMS) activation. However, as an important non-metallic element, the actual role of silicon (Si) in PMS activation still remains unclear. In this work, taking iron silicate (FeSi) as an example, the role of the Si region in PMS activation was clearly revealed. The experiments and density functional theory (DFT) calculation results showed that besides the traditional Fe sites, the Si also played a non-negligible role during PMS activation. In FeSi containing oxygen vacancies (Ovac), Fe-Si was the active site instead of Fe-Fe. The Bard charge results implied that the presence of Ovac tuned the electronic properties of FeSi, making the Si participate in PMS activation. This work deepened understanding of the role of Si in silicates for PMS activation and provided a theoretical basis for the development of excellent Si-based catalysts.
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Affiliation(s)
- Lin-Lin Su
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Sichuan 611130, China
| | - Rong-Jian Li
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Sichuan 611130, China
| | - Na Huang
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Sichuan 611130, China
| | - Ting-Ting Zhu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Shi-Huai Deng
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Sichuan 611130, China
| | - Xian-Xiang Wang
- College of Science, Sichuan Agricultural University, Sichuan 611130, China
| | - Gang Yang
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Sichuan 611130, China
| | - Yan-Zong Zhang
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Sichuan 611130, China
| | - Lu-Lu Long
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Sichuan 611130, China.
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13
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BiOBr/Bi2S3 heterojunction with S-scheme structureand oxygen defects: In-situ construction and photocatalytic behavior for reduction of CO2 with H2O. J Colloid Interface Sci 2022; 620:407-418. [DOI: 10.1016/j.jcis.2022.04.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 04/05/2022] [Accepted: 04/06/2022] [Indexed: 01/22/2023]
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14
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Chen X, Li S, Yang P, Chen Y, Xue C, Long Y, Han J, Su J, Huang W, Liu D. N-doped carbon intercalated Fe-doped MoS2 nanosheets with widened interlayer spacing: an efficient peroxymonosulfate activator for high-salinity organic wastewater treatment. J Colloid Interface Sci 2022; 628:318-330. [DOI: 10.1016/j.jcis.2022.07.145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/19/2022] [Accepted: 07/24/2022] [Indexed: 01/17/2023]
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15
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Chen L, Li Y, Zhang J, Li M, Yin W, Chen X. Oxidative degradation of tetracycline hydrochloride by Mn2O3/Bi2O3 photocatalysis activated peroxymonosulfate. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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16
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Xu G, Wu Y, Fang X, Li J, Xu L, Han S, Cui J, Gan L. One-step solvothermal synthesis of wood flour carbon fiber/BiOBr composites for photocatalytic activation of peroxymonosulfate towards sulfadiazine degradation: mechanisms comparison between photo, chemical and photo-chemical oxidation processes. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Photocatalytic degradation of ammonium dinitramide over novel S-scheme g-C3N4/BiOBr heterostructure nanosheets. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.120449] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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18
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Wang T, Zhou J, Wang W, Zhu Y, Niu J. Ag-single atoms modified S1.66-N1.91/TiO2-x for photocatalytic activation of peroxymonosulfate for bisphenol A degradation. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.08.085] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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19
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Zheng X, Zhang X, Cai Y, Zhao S, Wang S. Efficient degradation of bisphenol A with MoS 2/BiVO 4 hetero-nanoflower as a heterogenous peroxymonosulfate activator under visible-light irradiation. CHEMOSPHERE 2022; 289:133158. [PMID: 34875299 DOI: 10.1016/j.chemosphere.2021.133158] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/20/2021] [Accepted: 12/02/2021] [Indexed: 05/14/2023]
Abstract
Photocatalyst activated peroxymonosulfate (PMS) under visible-light irradiation to construct a photo-Fenton system has shown great application prospect for environmental remediation. In this study, MoS2/BiVO4 heterojunction nanoflowers were successfully synthesized by hydrothermal method and used to activate PMS under visible-light to achieve highly efficient degradation of bisphenol A (BPA). The constructed heterojunction showed excellent catalytic activity, which was attributed to the synergistic effect of effective separation of charge carriers and PMS activation. In the MoS2/BiVO4/PMS/vis system, 2-MoS2/BiVO4 (2-MB) exhibited the highest degradation rate constant for BPA (0.1747 min-1), which was 91.9 times of pure MoS2 and 38.0 times of pure BiVO4, respectively. The electron paramagnetic resonance (EPR) and radical quenching experiments demonstrated that the oxidative degradation of BPA was mainly participated by SO4-, OH, 1O2 and h+ active species. Through the analysis of energy band structure and element valence state of photocatalyst and the identification of reaction intermediates, the degradation mechanism and degradation pathways were proposed. In addition, MoS2/BiVO4 heterojunction showed high catalytic ability for various organic pollutants (herbicides, pesticide intermediates, antibiotics and dyes), and common anions (Cl-, SO42- and NO3-) and humic acid (HA) had little effect on its degradation efficiency. This study has provided a new solution for the use of heterojunction photocatalysts for visible-light assisted PMS activation to achieve highly efficient degradation of organic pollutants.
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Affiliation(s)
- Xiao Zheng
- School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, PR China
| | - Xiaodong Zhang
- School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, PR China.
| | - Yanpeng Cai
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Shan Zhao
- School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, PR China
| | - Shuguang Wang
- School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, PR China
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20
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He L, Guan W, Zeng Y, Zhao D, Qiu X, Jia G. Molybdenum Sulfide (MoS2)/Ordered Mesoporous Carbon (OMC) Tubular Mesochannel Photocatalyst for Enhanced Photocatalytic Oxidation for Removal of Volatile Organic Compounds (VOCs). Front Chem 2022; 9:748622. [PMID: 35155376 PMCID: PMC8831714 DOI: 10.3389/fchem.2021.748622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 12/13/2021] [Indexed: 11/13/2022] Open
Abstract
Air pollutants cause severe problems in urban areas, specifically in terms of toxicological impacts on human health. Therefore, it is urgent to develop an effective, safe, and inexpensive technique to remove these air pollutants. In this study, the MoS2/OMC heterojunction photocatalyst was successfully synthesized by a hydrothermal process and used for improving photocatalytic oxidation performance for removing VOCs. Formaldehyde was used as a model VOC in the gas phase and was removed at room temperature under visible light irradiation. For my research, the microstructure and morphology of the photocatalyst were deeply characterized, and the results indicated that MoS2 were successfully coupled into OMC materials to prepare MoS2/OMC heterojunction photocatalysts. The trend of photocatalytic efficiency for formaldehyde decomposition was MoS2/OMC > MoS2 > OMC. Besides, the MoS2/OMC heterojunction photocatalyst showed an excellent regeneration performance after several recycles, indicating the potential of MoS2/OMC composite as a promising photocatalyst for VOC removal. These results indicated that the photocatalytic reactor containing MoS2/OMC photocatalysts was highly active and stable.
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Affiliation(s)
- Li He
- Resource and Environment College, Zunyi Normal University, Zunyi, China
| | - Wei Guan
- Chongqing Key Laboratory of Environmental Materials and Remediation Technologies, Chongqing University of Arts and Sciences, Chongqing, China
- *Correspondence: Wei Guan,
| | - Yao Zeng
- Ecological Environment Monitoring Station of Dadukou District, Chongqing, China
| | - De Zhao
- College of Mathematics and Statistics, Chongqing University, Chongqing, China
| | - Xuemin Qiu
- Chongqing Jingchuang United Environmental Protection Engineering Co. Ltd, Chongqing, China
| | - Guo Jia
- Chongqing Jingchuang United Environmental Protection Engineering Co. Ltd, Chongqing, China
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21
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Liu C, Mao S, Shi M, Wang F, Xia M, Chen Q, Ju X. Peroxymonosulfate activation through 2D/2D Z-scheme CoAl-LDH/BiOBr photocatalyst under visible light for ciprofloxacin degradation. JOURNAL OF HAZARDOUS MATERIALS 2021; 420:126613. [PMID: 34273881 DOI: 10.1016/j.jhazmat.2021.126613] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 07/06/2021] [Accepted: 07/07/2021] [Indexed: 06/13/2023]
Abstract
The synergistic effect between photocatalytic and peroxymonosulfate (PMS) activation has been widely applied in the field of sewage treatment. In this work, we synthesized a two-dimensional/two-dimensional (2D/2D) CoAl-LDH/BiOBr Z-scheme photocatalyst via a simple method. Then, multiple detection results demonstrated that CoAl-LDH was successfully anchored onto BiOBr, as well as formed an intimate interaction. Moreover, the photocatalytic degradation performance of the catalysts/PMS/vis system had been explored under several conditions (e.g., different catalyst doses, PMS doses, anions and pollutants). The 8 wt% CoAl-LDH/BiOBr composite exhibited the highest degradation efficiency (96%) of ciprofloxacin (CIP). In addition, radicals quenching experiments and electron paramagnetic resonance (EPR) indicated that •O2- and 1O2 were the primary radicals for CIP degradation. The photoelectrochemical measurement and photoluminescence (PL) confirmed that 8 wt% CoAl-LDH/BiOBr exhibited the highest separation and transfer rate of charge carriers. The liquid chromatography-mass spectrometer (LC-MS) analysis revealed that oxidation of the piperazine ring and defluorination were the main CIP degradation pathways. Density functional theory (DFT) calculation, including the laplacian bond order (LBO) and Fukui index, which was consistent with the results of LC-MS. This study explained the superiority of the synergistic effect between photocatalysis and PMS activation on the degradation of pollutants.
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Affiliation(s)
- Chun Liu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Shuai Mao
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Mingxing Shi
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Fengyun Wang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Mingzhu Xia
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Qun Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, China.
| | - Xuehai Ju
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
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22
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Gu C, Hu J, Zhang M, Ding J, Gong T, Wang Z, Zhu J, Gan M. Development of a hydroxyl group-mediated biosynthetic schwertmannite as a persulfate activator for efficient degradation of RhB and Cr(VI) removal. JOURNAL OF HAZARDOUS MATERIALS 2021; 419:126496. [PMID: 34216963 DOI: 10.1016/j.jhazmat.2021.126496] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 06/03/2021] [Accepted: 06/17/2021] [Indexed: 06/13/2023]
Abstract
Recently, sulfate radical-based advanced oxidation processes (SR-AOPs) have shown broad potential for restoring the water environment. However, the application of SR-AOPs to simultaneously remove organic pollutants and Cr(VI) has rarely been reported. Herein, we developed a modified schwertmannite (Sch-PVA) synthesized via the mediation of Acidithiobacillus ferrooxidans in the introduction of polyvinyl alcohol (PVA). This modification significantly changed the morphology and structure of the schwertmannite (Sch). The specific surface area and the density of functional sites also increased. Sch-PVA significantly increased the persulfate (PDS) activation efficiency. Even in 100 mg L-1 rhodamine B (RhB) conditions, 96.3% of RhB was eliminated by 0.5 g L-1Sch-PVA and 6 mM PDS in 120 min. Moreover, excellent performance was exhibited over a wide pH range. The dissolution of the passivation layer facilitated the exposure of new adsorption and reduction sites, thereby enhancing the simultaneous removal of RhB and Cr(VI). Quenching experiments and electron spin resonance (ESR) measurements verified that sulfate and hydroxyl radicals were generated. The hydroxyl groups on the Sch-PVA surface played a key role in the bonding with and the activation of PDS. In conclusion, Sch-PVA provides new insights into the catalyst application for simultaneous removal of organic pollutants and Cr(VI).
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Affiliation(s)
- Chunyao Gu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Jing Hu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Min Zhang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Jijuan Ding
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Tong Gong
- Faculty of life science and technology, Kunming university of science and technology, Kunming 650500, China
| | - Zhisong Wang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Jianyu Zhu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, China.
| | - Min Gan
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, China.
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23
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Wang L, Wang L, Shi Y, Zhu J, Zhao B, Zhang Z, Ding G, Zhang H. Fabrication of Co 3O 4-Bi 2O 3-Ti catalytic membrane for efficient degradation of organic pollutants in water by peroxymonosulfate activation. J Colloid Interface Sci 2021; 607:451-461. [PMID: 34509119 DOI: 10.1016/j.jcis.2021.08.086] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 07/29/2021] [Accepted: 08/09/2021] [Indexed: 10/20/2022]
Abstract
In this study, a functionalized Co3O4-Bi2O3-Ti catalytic membrane (CBO-Ti-M) was prepared and applied for removing organic pollutants via activating peroxymonosulfate (PMS) in the dead-end filtration mode. Characterizations including scanning electron microcopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) showed that the Co3O4-Bi2O3 catalyst was successfully supported on the Ti membrane. The CBO-Ti-M /PMS system could efficiently remove various organic pollutants such as sulfamethoxazole, methyl orange, bisphenol A and methylene blue, achieving removal efficiencies of 98.0%-99.5%. The effects of PMS concentration, flow rate and solution environment on degradation efficiency were investigated in detail. Furthermore, quenching experiments, electron spin resonance (ESR) and in-situ open circuit potential (OCP) tests collectively demonstrated that singlet oxygen as well as the non-radical electron transfer pathway mainly contributed in the reaction mechanism. The synergistic effect of Co and Bi was illustrated according to XPS results, and the possible degradation pathway of MB was proposed based on LC-MS analysis. Reusability test showed that pollutant removal efficiency with the CBO-Ti-M /PMS system remained stable in four runs and limited metal leaching was observed.
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Affiliation(s)
- Linlin Wang
- State Key Laboratory of Separation Membranes and Membrane Processes, School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Liang Wang
- State Key Laboratory of Separation Membranes and Membrane Processes, School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China.
| | - Yawei Shi
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China.
| | - Jiandong Zhu
- State Key Laboratory of Separation Membranes and Membrane Processes, School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Bin Zhao
- State Key Laboratory of Separation Membranes and Membrane Processes, School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Zhaohui Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes, School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Guanghui Ding
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China
| | - Hongwei Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes, School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China
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