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Zhou B, Liu Q, Zheng C, Ge Y, Huang L, Fu H, Fang S. Enhanced Fenton-like catalysis via interfacial regulation of g-C 3N 4 for efficient aromatic organic pollutant degradation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 356:124341. [PMID: 38852662 DOI: 10.1016/j.envpol.2024.124341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 05/07/2024] [Accepted: 06/04/2024] [Indexed: 06/11/2024]
Abstract
For the efficient degradation of organic pollutants with the goal of reducing the water environment pollution, we employed an alkaline hydrothermal treatment on primeval g-C3N4 to synthesize a hydroxyl-grafted g-C3N4 (CN-0.5) material, from which we engineered a novel Fenton-like catalyst, known as Cu-CN-0.5. The introduction of numerous hydroxyl functional groups allowed the CN-0.5 substrate to stably fix active copper oxide particles through surface complexation, resulting in a low Cu leaching rate during a Cu-CN-0.5 Fenton-like process. A sequence of characterization techniques and theoretical calculations uncovered that interfacial complexation induced charge redistribution on the Cu-CN-0.5 surface. Specifically, some of the π electrons in the tris-s-triazine units were transferred to the copper oxide particles along the newly formed chemical bonds (C(π)-O-Cu), forming a π-deficient area on the tris-s-triazine plane near the complexation site. In a typical Cu-CN-0.5 Fenton-like process, a stable π-π interaction was established due to the favorable positive-negative match of electrostatic potential between the aromatic pollutants and π-deficient areas, leading to a significant improvement in Cu-CN-0.5's adsorption capacity for aromatic pollutants. Furthermore, pollutants also delivered electrons to the Cu-CN-0.5 Fenton-like system via a "through-space" approach, which suppressed the futile oxidation of H2O2 in reducing the high-valent Cu2+ and significantly improved the generation efficiency of •OH with high oxidative capacity. As expected, Cu-CN-0.5 not only exhibited an efficient Fenton degradation for several typical aromatic organic pollutants, but also demonstrated both a low metal leaching rate (0.12 mg/L) and a H2O2 utilization rate exceeding 80%. The distinctive Fenton degradation mechanism substantiated the potential of the as-prepared material for effective wastewater treatment applications.
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Affiliation(s)
- Bin Zhou
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou, 350108, China.
| | - Qingsong Liu
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou, 350108, China.
| | - Caihong Zheng
- Fuzhou Ecological Environment Promotion and Education Center, Fuzhou, 350000, China.
| | - Yao Ge
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou, 350108, China.
| | - Lili Huang
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou, 350108, China.
| | - Haoyang Fu
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
| | - Shengqiong Fang
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou, 350108, China.
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Liu Q, Li H, Kong L, Du Y, Da Y, Sun Z, Dong Y, Zhang W, Liu Y, Tian X, Wang H. High-Loading Smart Carrier Containing 2-Mercaptobenzimidazole-Zn 2+-Polydopamine with pH-Responsive Function to Fabricate High-Performance Waterborne Epoxy Anticorrosion Coatings. ACS APPLIED MATERIALS & INTERFACES 2024; 16:19651-19662. [PMID: 38578276 DOI: 10.1021/acsami.4c02722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
Corrosion inhibitor additives are considered to be one of the effective methods to slow down the corrosion of metals, but the corrosion inhibitors will decompose and lose their effect in a long-term corrosive environment. In this work, a smart corrosion inhibitor carrier 2-mercaptobenzimidazole-Zn2+-polydopamine@graphite (MZPG) with excellent pH response was designed and synthesized using a one-pot method. This corrosion inhibitor carrier not only has a very high 2-mercaptobenzimidazole (MBI) loading capacity (38.0%) but also maintains a very low MBI activity to inhibit the decomposition of MZPG in the environment as much as possible. The MZPG/epoxy (MZPG/EP) coatings prepared by the spraying method showed excellent mechanical properties. Electrochemical and salt spray tests showed that the MZPG/EP coatings (1.20 × 1010 Ω·cm2) have excellent corrosion resistance with Rp values up to 3 orders of magnitude higher than that of the EP coating (1.25 × 107 Ω·cm2). Notably, the MZPG/EP coatings maintained good corrosion resistance under acidic conditions due to the pH-responsive release of corrosion inhibitors. This is of great significance for the future development of coatings for highly corrosive environments.
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Affiliation(s)
- Qiang Liu
- University of Science and Technology of China, Hefei 230026, China
- Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Hao Li
- University of Science and Technology of China, Hefei 230026, China
- Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Ling Kong
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Yiming Du
- University of Science and Technology of China, Hefei 230026, China
- Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Yunsheng Da
- University of Science and Technology of China, Hefei 230026, China
- Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Zhouping Sun
- University of Science and Technology of China, Hefei 230026, China
- Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Yong Dong
- University of Science and Technology of China, Hefei 230026, China
- Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Wei Zhang
- Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Yanyan Liu
- Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Xingyou Tian
- Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Hua Wang
- Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
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Gao T, Hu C, Xu C, Liang X, Chen Z, Lyu L. Resourcelized conversion of poultry feces to ordered carbon with electron poor/rich microregions for water purification induced by peroxymonosulfate. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 337:122536. [PMID: 37716697 DOI: 10.1016/j.envpol.2023.122536] [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: 06/22/2023] [Revised: 07/27/2023] [Accepted: 09/08/2023] [Indexed: 09/18/2023]
Abstract
For the sustainable reutilization of poultry feces (PF) to reduce environmental pollution, we present a novel approach for converting PF into a highly effective catalyst, consisting of trace copper (Cu) and sulfur (S) linked with ordered graphitized carbon (CS/CPF) for wastewater purification. Raman and EPR results verified that the disorderly organic matters in PF are transformed into orderly graphene structures that complexed with Cu to form large numbers of electron-poor/rich microregions on CS/CPF surface. The electrons from electron-rich organic pollutants can be directly captured by dissolved oxygen (DO) to produce abundant reactive oxygen species due to the enhanced electron polarization via the construction of Cu-S-C bond bridge on CS/CPF surface, which greatly enhance the removal efficiency of pollutants. CS/CPF achieves 100% removal for 2,4-dichlorophenoxyacetic acid (2,4-D) in just 10 min after adding trace peroxymonosulfate (PMS), keeping efficient catalytic activity after continuous reactions for 240 h. This strategy offers a practical and sustainable solution for the efficient resource recovery of poultry feces.
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Affiliation(s)
- Tingting Gao
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay Area, Guangzhou University, Guangzhou 510006, China
| | - Chun Hu
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay Area, Guangzhou University, Guangzhou 510006, China
| | - Congfeng Xu
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay Area, Guangzhou University, Guangzhou 510006, China
| | - Xianhua Liang
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay Area, Guangzhou University, Guangzhou 510006, China
| | - Zhiqing Chen
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay Area, Guangzhou University, Guangzhou 510006, China
| | - Lai Lyu
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay Area, Guangzhou University, Guangzhou 510006, China; Institute of Rural Revitalization, Guangzhou University, Guangzhou 510006, China.
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Zhong J, Ma Y, Jiang S, Dai G, Liu Z, Shu Y. The adsorption affinity of N-doped biochar plays a crucial role in peroxydisulfate activation and bisphenol A oxidative degradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:88630-88643. [PMID: 35834086 DOI: 10.1007/s11356-022-21747-0] [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: 03/04/2022] [Accepted: 06/26/2022] [Indexed: 06/15/2023]
Abstract
Metal-free biochar to activate persulfate and degrade organic contaminants has attracted great attention in advanced oxidation processes, while the role of biochar adsorption in the activation and oxidative decomposition process still needed to be further clarified. In this study, nitrogen-doped porous biochar derived from a waste litchi branch was prepared as a peroxydisulfate (PDS) activator for bisphenol A (BPA) degradation, in which the regulation behavior of biochar adsorption was evaluated on the basis of phase distribution and PDS activation mechanism. N-doped biochar obtained at 800 °C with urea and sodium bicarbonate added presented a high specific surface area (821 m2/g), abundant nanopores, and a graphitic structure, and showed the best adsorption capacity and catalytic activity toward BPA. At a dosage of 0.15 g/L NBC-800, 95% BPA can be completely degraded within 60 min with an apparent rate constant (kobs) of 0.0483 min-1. The identified active sites and reactive oxygen species as well as electrochemical tests suggested that both free radicals O2•- and •OH and nonradical pathways including 1O2 originated from C = O and surface electron-transfer mechanisms were involved in BPA decomposition. The experiments and activation mechanisms all confirmed that BPA adsorption on the NBC-800 surface was an extremely crucial step for BPA oxidative degradation.
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Affiliation(s)
- Jie Zhong
- School of Environment, South China Normal University, Guangzhou, 510006, China
| | - Yancheng Ma
- School of Environment, South China Normal University, Guangzhou, 510006, China
| | - Shaojun Jiang
- School of Environment, South China Normal University, Guangzhou, 510006, China
- Jiangxi Province Academy of Environmental Science, Nanchang, China
| | - Guangling Dai
- School of Environment, South China Normal University, Guangzhou, 510006, China
| | - Zhenyuan Liu
- School of Environment, South China Normal University, Guangzhou, 510006, China
| | - Yuehong Shu
- School of Environment, South China Normal University, Guangzhou, 510006, China.
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Li C, Cai X, Fang Q, Luo Y, Zhang P, Lu C, Han M, Hu C, Lyu L. Peroxymonosulfate as inducer driving interfacial electron donation of pollutants over oxygen-rich carbon–nitrogen graphene-like nanosheets for water treatment. J Colloid Interface Sci 2022; 622:272-283. [DOI: 10.1016/j.jcis.2022.04.083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 04/12/2022] [Accepted: 04/13/2022] [Indexed: 11/17/2022]
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