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Zhang M, Wu J, Tang W, Mei J, Zhang Q, Wu J, Xu D, Liu Z, Hao F, Sheng L, Xu H. Inverted loading strategy regulates the Mn-O V-Ce sites for efficient fenton-like catalysis. J Colloid Interface Sci 2024; 668:303-318. [PMID: 38678886 DOI: 10.1016/j.jcis.2024.04.164] [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: 01/21/2024] [Revised: 04/22/2024] [Accepted: 04/23/2024] [Indexed: 05/01/2024]
Abstract
Regulating interfacial active sites to improve peroxymonosulfate (PMS) activation efficiency is a hot topic in the heterogeneous catalysis field. In this study, we develop an inverted loading strategy to engineer asymmetric Mn-OV-Ce sites for PMS activation. Mn3O4@CeO2 prepared by loading CeO2 nanoparticles onto Mn3O4 nanorods exhibits the highest catalytic activity and stability, which is due to the formation of more oxygen vacancies (OV) at the Mn-OV-Ce sites, and the surface CeO2 layer effectively inhibits corrosion by preventing the loss of manganese ion active species into the solution. In situ characterizations and density functional theory (DFT) studies have revealed effective bimetallic redox cycles at asymmetric Mn-OV-Ce active sites, which promote surface charge transfer, enhance the adsorption reaction activity of active species toward pollutants, and favor PMS activation to generate (•OH, SO4•-, O2•- and 1O2) active species. This study provides a brand-new perspective for engineering the interfacial behavior of PMS activation.
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Affiliation(s)
- Mengyu Zhang
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, Anhui 236037, PR China
| | - Jing Wu
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, Anhui 236037, PR China
| | - Wen Tang
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, Anhui 236037, PR China
| | - Jinfei Mei
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, Anhui 236037, PR China
| | - Qian Zhang
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, Anhui 236037, PR China
| | - Junrong Wu
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, Anhui 236037, PR China
| | - Deyun Xu
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, Anhui 236037, PR China
| | - Zhaodi Liu
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, Anhui 236037, PR China.
| | - Fuying Hao
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, Anhui 236037, PR China
| | - Liangquan Sheng
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, Anhui 236037, PR China
| | - Huajie Xu
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, Anhui 236037, PR China.
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2
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Jiang X, Meng S, Nan Z. Singlet Oxygen Formation Mechanism for the H 2O 2-Based Fenton-like Reaction Catalyzed by the Carbon Nitride Homojunction. Inorg Chem 2024; 63:6701-6713. [PMID: 38563144 DOI: 10.1021/acs.inorgchem.3c04626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
The singlet oxygen (1O2) oxidation process activated by metal-free catalysts has recently attracted considerable attention for organic pollutant degradation; however, the 1O2 formation remains controversial. Simultaneously, the catalytic activity of the metal-free catalyst limits the practical application. In this study, carbon nitride (HCCN) containing an intramolecular homojunction, a kind of metal-free catalyst, exhibits excellent activity compared to g-C3N4 (CN) and crystalline carbon nitride (HCN) for tetracycline hydrochloride degradation through the H2O2-based Fenton-like reaction. The rate constant for HCCN increased about 16.1 and 8.9 times than that of CN and HCN, respectively. The activity of HCCN was enhanced, and the dominant reactive oxygen species (ROS) changed from hydroxyl radicals (•OH) to 1O2 with an increase in pH from 4.5 to 11.5. A novel formation pathway of 1O2 was revealed. This result is different from the normal reference, in which •OH is always the primary ROS in the H2O2-based Fenton-like reaction. This study may provide a possible strategy for the investigation on the nonradical oxidation process in the Fenton-like reaction.
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Affiliation(s)
- Xuan Jiang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Suhang Meng
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Zhaodong Nan
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
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3
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Mo Y, Zhang X. Insights into the mechanism of multiple Cu-doped CoFe 2O 4 nanocatalyst activated peroxymonosulfate for efficient degradation of Rhodamine B. J Environ Sci (China) 2024; 137:382-394. [PMID: 37980024 DOI: 10.1016/j.jes.2022.12.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 12/01/2022] [Accepted: 12/02/2022] [Indexed: 11/20/2023]
Abstract
The multiple metal catalyst as a promising nanomaterial has shown excellent activity in the peroxymonosulfate (PMS) activation for pollutant degradation. However, the role of special sites and in-depth understanding of the PMS activation mechanism are not fully studied. In this study, a Cu-doped CoFe2O4 nanocatalyst (0.5CCF) was synthesized by a sol-gel and calcination method, and used for PMS activation to remove Rhodamine B (RhB). The results showed that the Cu doping obviously enhanced the catalytic performance of CoFe2O4, with 99.70% of RhB removed by 0.5CCF while 74.91% in the CoFe2O4 within 15 min. Based on the X-ray photoelectron spectroscopy and electrochemical analysis, this could be ascribed to the more low valence of Co and Fe species generated on the 0.5CCF and faster electron transfers occurred in the 0.5CCF due to the Cu doping. In addition, Cu doping could provide more reaction sites for the 0.5CCF to activate PMS for RhB removal. The metal species and the surface hydroxyl were the reaction sites of PMS activation, and the surface hydroxyl played an important role in surface-bound reactive species generation. During the PMS activation, the Cu not only activated PMS to produce reactive oxygen species (ROS), but also regenerated Co2+ and Fe2+ to accelerate the PMS activation. The non-radical of 1O2 was the main ROS with a 99.35% of contribution rate, and the SO5•- self-reaction was its major source. This study provides a new insight to enhance the PMS activation performance of multiple metal catalysts by Cu doping in wastewater treatment.
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Affiliation(s)
- Yuanmin Mo
- School of Environment & Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of Ministry of Education, Guangzhou 510006, China
| | - Xiaoping Zhang
- School of Environment & Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of Ministry of Education, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou 510006, China; Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, Guangzhou 510006, China.
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4
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Yuan F, Jia S, Yan D, Zhang X, Zhang J, Xia T. Graphene oxide dispersed mesoporous ZIF-8-encapsulated laccase for removal of toluidine blue with multiple enhanced stability. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:5132-5143. [PMID: 38112876 DOI: 10.1007/s11356-023-31542-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 12/10/2023] [Indexed: 12/21/2023]
Abstract
The extensive use and discharge of toluidine blue have caused serious problems to the water environment. As a green biocatalyst, laccase has the ability to decolorize the dyes, but it is limited by poor reusability and low stability. Metal-organic frameworks (MOFs) are a good platform for enzyme immobilization. However, due to the weak dispersion of MOFs, the enzyme activity is inevitably inhibited. Herein, we proposed to use graphene oxide (GO) as the dispersion medium of mesoporous ZIF-8 to construct MZIF-8/GO bi-carrier for laccase (FL) immobilization. On account of the narrower bandgap energy of FL@MZIF-8/GO (4.07 eV) than that of FL@MZIF-8 (4.69 eV), electron transport was enhanced which later increased the catalytic activity of the immobilized enzyme. Meanwhile, the improved hydrophilicity characterized by contact angle and full infiltration time further promoted the efficiency of the enzymatic reaction. Benefiting from such regulatory effects of GO, the composite showed excellent storage stability and reusability, as well as multifaceted enhancements including pH, thermal, and solvent adaptation. On the basis of the characterized synergistic effect of adsorption and degradation, FL@MZIF-8/GO was successfully applied to the degradation of toluidine blue (TB) with a removal rate of 94.8%. Even in actual treated wastewater, the highest removal rate still reached more than 80%. Based on the inner mechanism analysis and the universality study, this material is expected to be widely used in the degradation of pollutants in real water under complex environmental conditions.
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Affiliation(s)
- Fang Yuan
- College of Urban Construction, Nanjing Tech University, Puzhu Road 30, Nanjing, 11816, People's Republic of China.
| | - Shengran Jia
- College of Urban Construction, Nanjing Tech University, Puzhu Road 30, Nanjing, 11816, People's Republic of China
| | - Dingfan Yan
- College of Urban Construction, Nanjing Tech University, Puzhu Road 30, Nanjing, 11816, People's Republic of China
| | - Xiaokuan Zhang
- College of Urban Construction, Nanjing Tech University, Puzhu Road 30, Nanjing, 11816, People's Republic of China
| | - Jinbo Zhang
- College of Urban Construction, Nanjing Tech University, Puzhu Road 30, Nanjing, 11816, People's Republic of China
| | - Ting Xia
- College of Urban Construction, Nanjing Tech University, Puzhu Road 30, Nanjing, 11816, People's Republic of China
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Dong W, Zhao Z, Liu F, Li P, Wang L, Zhou Y, Shen Y, Lang C, Deng B, Li H, Li D. PVDF Nanofiber Modified with ZnO Nanowires/Polydopamine for the Treatment of Sewage Containing Heavy Metals, Organic Dyes, and Bacteria. ACS APPLIED MATERIALS & INTERFACES 2023; 15:58994-59004. [PMID: 38079597 DOI: 10.1021/acsami.3c12585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2023]
Abstract
In various countries worldwide, the issue of wastewater contamination poses a significant threat due to its intricate composition of heavy metals, organic dyes, and microorganisms, thereby complicating the purification process. Consequently, researchers have expressed considerable interest in materials capable of eliminating organic, heavy metal, and microbial pollutants. This study focuses on the fabrication of a water purification membrane (PDA/ZnO-NWs/PVDF) with a hierarchical structure and the ability to remove multiple pollutants. The membrane was created by modifying poly(vinylidene fluoride) (PVDF) nanofiber with zinc oxide nanowires (ZnO-NWs) and reinforcing it with polydopamine (PDA). The experimental results demonstrate that the PDA/ZnO-NWs/PVDF membrane exhibits a range of functionalities, including long-lasting superhydrophilicity, Cu(II) adsorption, photocatalytic degradation, and antibacterial ability. The manipulation of the DA synthesis procedure allows for the adjustment of the wettability, adsorption, and photocatalytic and antibacterial activities of the PDA/ZnO-NWs/PVDF composite. According to the Langmuir isotherm, the maximum Cu(II) adsorption capacity of the PDA/ZnO-NWs/PVDF membrane is determined to be 65.75 mg/g, which is significantly higher (27.26 mg/g) than that of the ZnO-NWs/PVDF membrane (38.49 mg/g). The PDA/ZnO-NWs/PVDF composite exhibited a notable degradation capacity toward rhodamine B under natural sunlight, reaching a maximum of 5.97 mg/g. Additionally, the degradation rate achieved during daylight hours was as high as 90.42%. Furthermore, the antibacterial efficacy of the PDA/ZnO-NWs/PVDF composite against both Gram-positive and Gram-negative bacteria approached 100%. This work presents a promising approach for the treatment of wastewater containing various coexisting contaminants.
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Affiliation(s)
- Wenhao Dong
- Key Laboratory of Eco-Textiles (Ministry of Education), Nonwoven Technology Laboratory, Jiangnan University, Wuxi 214122, China
| | - Ziqiang Zhao
- Key Laboratory of Eco-Textiles (Ministry of Education), Nonwoven Technology Laboratory, Jiangnan University, Wuxi 214122, China
| | - Feng Liu
- School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, China
| | - Peihang Li
- Key Laboratory of Eco-Textiles (Ministry of Education), Nonwoven Technology Laboratory, Jiangnan University, Wuxi 214122, China
| | - Lanlan Wang
- Key Laboratory of Eco-Textiles (Ministry of Education), Nonwoven Technology Laboratory, Jiangnan University, Wuxi 214122, China
| | - Yuqi Zhou
- Key Laboratory of Eco-Textiles (Ministry of Education), Nonwoven Technology Laboratory, Jiangnan University, Wuxi 214122, China
| | - Ying Shen
- School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, China
| | - Chenhong Lang
- College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Bingyao Deng
- Key Laboratory of Eco-Textiles (Ministry of Education), Nonwoven Technology Laboratory, Jiangnan University, Wuxi 214122, China
| | - Haoxuan Li
- Key Laboratory of Eco-Textiles (Ministry of Education), Nonwoven Technology Laboratory, Jiangnan University, Wuxi 214122, China
| | - Dawei Li
- Key Laboratory of Eco-Textiles (Ministry of Education), Nonwoven Technology Laboratory, Jiangnan University, Wuxi 214122, China
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Zhang X, Li X, Yu P, Yu Y, Fan X, Zhang J, Yu Y, Zheng H, Sun Y. Photocatalytic O 2 activation by metal-free carbon nitride nanotube for rapid reactive species generation and organic contaminants degradation. JOURNAL OF HAZARDOUS MATERIALS 2023; 456:131715. [PMID: 37245367 DOI: 10.1016/j.jhazmat.2023.131715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 05/09/2023] [Accepted: 05/24/2023] [Indexed: 05/30/2023]
Abstract
Advanced oxidation processes (AOPs) using oxygen (O2) as an oxidant represent a low-cost and sustainable wastewater treatment process. Herein, a metal-free nanotubular carbon nitride photocatalyst (CN NT) was prepared to activate O2 to degrade organic contaminants. The nanotube structure allowed for sufficient O2 adsorption, while the optical and photoelectrochemical properties enabled photogenerated charge to be efficiently transferred to the adsorbed O2 to trigger the activation process. The developed CN NT/Vis-O2 system based on O2 aeration degraded various organic contaminants and mineralized 40.7% of chloroquine phosphate within 100 min. In addition, the toxicity and environmental risk of treated contaminants were reduced. Mechanistic studies suggested that the enhanced O2 adsorption capacity and fast charge transfer behavior on CN NT surface led to reactive·O2-, 1O2 and h+ generation, each of which played a distinct role in contaminants degradation. Importantly, the proposed process could overcome the interference from water matrices and outdoor sunlight, and the energy and chemical reagent savings reduced the operating cost to about 1.63 US$·m-3. Altogether, this work provides insights into the potential application of metal-free photocatalysts and green O2 activation for wastewater treatment.
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Affiliation(s)
- Xiao Zhang
- Jiangsu Key Laboratory of Industrial Pollution Control and Resource Reuse, School of Environmental Engineering, Xuzhou University of Technology, Xuzhou 221018, China.
| | - Xi Li
- School of Environmental Sciences and Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Peng Yu
- School of Environmental Sciences and Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Ying Yu
- Jiangsu Key Laboratory of Industrial Pollution Control and Resource Reuse, School of Environmental Engineering, Xuzhou University of Technology, Xuzhou 221018, China
| | - Xiulei Fan
- Jiangsu Key Laboratory of Industrial Pollution Control and Resource Reuse, School of Environmental Engineering, Xuzhou University of Technology, Xuzhou 221018, China
| | - Jiankun Zhang
- Jiangsu Key Laboratory of Industrial Pollution Control and Resource Reuse, School of Environmental Engineering, Xuzhou University of Technology, Xuzhou 221018, China
| | - Yang Yu
- Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
| | - Huaili Zheng
- Key laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Yongjun Sun
- College of Urban Construction, Nanjing Tech University, Nanjing 211816, China.
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Song ZY, Li YY, Duan W, Xiao XY, Gao ZW, Zhao YH, Liang B, Chen SH, Li PH, Yang M, Huang XJ. Decisive role of electronic structure in electroanalysis for sensing materials: Insights from density functional theory. Trends Analyt Chem 2023. [DOI: 10.1016/j.trac.2023.116977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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8
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Zhang P, Zhao R, Liu Z, Su Y, Du C. Natural coal gangue as a stable catalyst to activate persulfate: tetracycline hydrochloride degradation and its explored mechanism. NEW J CHEM 2023. [DOI: 10.1039/d2nj04738a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
Abstract
The surface-bonded hydroxyl groups on CG play the dominant role in PS activation and TC removal.
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Affiliation(s)
- Pengfei Zhang
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia, 010021, P. R. China
| | - Rongbo Zhao
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia, 010021, P. R. China
| | - Zhiliang Liu
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia, 010021, P. R. China
| | - Yiguo Su
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia, 010021, P. R. China
| | - Chunfang Du
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia, 010021, P. R. China
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Catalytic Degradation of Rhodamine B by a Novel Cobalt Complex Based on TTF Derivative. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2023.121394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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10
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Wang Q, Xiao M, Peng Z, Zhang C, Du X, Wang Z, Wang W. Visible LED photocatalysis combined with ultrafiltration driven by metal-free oxygen-doped graphitic carbon nitride for sulfamethazine degradation. JOURNAL OF HAZARDOUS MATERIALS 2022; 439:129632. [PMID: 35872449 DOI: 10.1016/j.jhazmat.2022.129632] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 07/07/2022] [Accepted: 07/16/2022] [Indexed: 06/15/2023]
Abstract
A novel visible light emitting diode (LED) photocatalysis combined ultrafiltration (UF) system driven by metal-free O-doped C3N4 was established for sulfamethazine (SMZ) removal in environmental remediation. Among different O-doping ratios, 8%O-C3N4 exhibited the optimal SMZ degradation efficiency (89.36%) and the flux of 8%O-C3N4/LED/UF system could reach up to 38.92 L/m2/h. Benefitting from the O-doping, the synergetic effect of the expansion of visible-light absorption, enhancement of electron redox capacity, and improvement of e--h+ separation efficiency could produce the intensified photoactivity. Superoxide radical (O2•-) and single oxygen (1O2) were proved to be the primary active species by EPR and quenching tests. Moreover, the influence of several parameters such as photocatalyst dosage, SMZ concentration, raw turbidity and humic acid concentration in 8%O-C3N4/LED/UF system on SMZ removal were systematically studied. Under simulated surface water matrix, 8%O-C3N4/LED/UF system could also remove 96.88% SMZ and stable membrane flux stabilized as high as 33.36 L/m2/h. This study makes a demonstration for applying highly-effective powdery photocatalysts in the actual wastewater treatment and designing future photocatalytic reactors.
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Affiliation(s)
- Qiao Wang
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Mengyao Xiao
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Zhitian Peng
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Chao Zhang
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Xing Du
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China.
| | - Zhihong Wang
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Wei Wang
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, PR China
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