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Molla Nadali Pishnamaz H, Farimaniraad H, Baghdadi M, Aminzadeh Goharrizi B, Mahpishanian S. Application of nickel foam cathode modified by single-wall carbon nanotube in electro-Fenton process coupled with anodic oxidation: Enhancing organic pollutants removal. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.117130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Chen S, He P, Zhou P, Wang X, Xiao F, He Q, Li J, Jia L, Zhang H, Jia B, Tang B. Development of a novel graphitic carbon nitride and multiwall carbon nanotube co-doped Ti/PbO 2 anode for electrocatalytic degradation of acetaminophen. CHEMOSPHERE 2021; 271:129830. [PMID: 33556630 DOI: 10.1016/j.chemosphere.2021.129830] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/25/2021] [Accepted: 01/29/2021] [Indexed: 06/12/2023]
Abstract
In this work, we have constructed a novel graphitic carbon nitride/multiwall carbon nanotube (GCN/CNT) doped Ti/PbO2 as anode for highly effective degradation of acetaminophen (ACE) wastewater. The ACE removal efficiency of 83.2% and chemical oxygen demand removal efficiency of 76.3% are achieved under the optimal condition of temperature 25 °C, initial pH 7, current density 15 mA cm-2 and Na2SO4 concentration 6.0 g L-1. The excellent electrocatalytic activity of Ti/PbO2-GCN-CNT anode for ACE oxidation is ascribed to the effective suppression of oxygen evolution and the enhanced electron transfer after introducing GCN and CNT. Furthermore, Ti/PbO2-GCN-CNT electrode displays excellent stability and reusability. ACE degradation is accomplished by direct oxidation and indirect oxidation, and ∙OH radical plays primary role in the indirect oxidation of ACE wastewater. The intermediates of ACE degradation are detailly investigated using LC-MS analysis and a possible degradation mechanism is proposed.
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Affiliation(s)
- Shouxian Chen
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Ping He
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China; International Science and Technology Cooperation Laboratory of Micro-nanoparticle Application Research, Southwest University of Science and Technology, Mianyang, 621010, PR China.
| | - Pengcheng Zhou
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Xuejiao Wang
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Feng Xiao
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Qihang He
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Jing Li
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Lingpu Jia
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Hui Zhang
- International Science and Technology Cooperation Laboratory of Micro-nanoparticle Application Research, Southwest University of Science and Technology, Mianyang, 621010, PR China; Department of Chemical and Biochemical Engineering, Western University, London, Ontario N6A 5B9, Canada
| | - Bin Jia
- International Science and Technology Cooperation Laboratory of Micro-nanoparticle Application Research, Southwest University of Science and Technology, Mianyang, 621010, PR China; Key Laboratory of Shock and Vibration of Engineering Materials and Structures of Sichuan Province, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Bin Tang
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, PR China.
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Nair KM, Kumaravel V, Pillai SC. Carbonaceous cathode materials for electro-Fenton technology: Mechanism, kinetics, recent advances, opportunities and challenges. CHEMOSPHERE 2021; 269:129325. [PMID: 33385665 DOI: 10.1016/j.chemosphere.2020.129325] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 12/10/2020] [Accepted: 12/13/2020] [Indexed: 06/12/2023]
Abstract
Electro-Fenton (EF) technique has gained significant attention in recent years owing to its high efficiency and environmental compatibility for the degradation of organic pollutants and contaminants of emerging concern (CECs). The efficiency of an EF reaction relies primarily on the formation of hydrogen peroxide (H2O2) via 2e─ oxygen reduction reaction (ORR) and the generation of hydroxyl radicals (●OH). This could be achieved through an efficient cathode material which operates over a wide pH range (pH 3-9). Herein, the current progresses on the advancements of carbonaceous cathode materials for EF reactions are comprehensively reviewed. The insights of various materials such as, activated carbon fibres (ACFs), carbon/graphite felt (CF/GF), carbon nanotubes (CNTs), graphene, carbon aerogels (CAs), ordered mesoporous carbon (OMCs), etc. are discussed inclusively. Transition metals and hetero atoms were used as dopants to enhance the efficiency of homogeneous and heterogeneous EF reactions. Iron-functionalized cathodes widened the working pH window (pH 1-9) and limited the energy consumption. The mechanism, reactor configuration, and kinetic models, are explained. Techno economic analysis of the EF reaction revealed that the anode and the raw materials contributed significantly to the overall cost. It is concluded that most reactions follow pseudo-first order kinetics and rotating cathodes provide the best H2O2 production efficiency in lab scale. The challenges, future prospects and commercialization of EF reaction for wastewater treatment are also discussed.
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Affiliation(s)
- Keerthi M Nair
- Centre for Precision Engineering, Materials and Manufacturing Research (PEM), Institute of Technology, Sligo, F91 YW50, Ireland; Nanotechnology and Bio-Engineering Research Group, Department of Environmental Science, Institute of Technology, Sligo, F91 YW50, Ireland
| | - Vignesh Kumaravel
- Centre for Precision Engineering, Materials and Manufacturing Research (PEM), Institute of Technology, Sligo, F91 YW50, Ireland; Nanotechnology and Bio-Engineering Research Group, Department of Environmental Science, Institute of Technology, Sligo, F91 YW50, Ireland
| | - Suresh C Pillai
- Centre for Precision Engineering, Materials and Manufacturing Research (PEM), Institute of Technology, Sligo, F91 YW50, Ireland; Nanotechnology and Bio-Engineering Research Group, Department of Environmental Science, Institute of Technology, Sligo, F91 YW50, Ireland.
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Graphitic Carbon Nitride-Based Composite in Advanced Oxidation Processes for Aqueous Organic Pollutants Removal: A Review. Processes (Basel) 2020. [DOI: 10.3390/pr9010066] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In recent decades, a growing number of organic pollutants released have raised worldwide concern. Graphitic carbon nitride (g-C3N4) has drawn increasing attention in environmental pollutants removal thanks to its unique electronic band structure and excellent physicochemical stability. This paper reviews the recent progress of g-C3N4-based composites as catalysts in various advanced oxidation processes (AOPs), including chemical, photochemical, and electrochemical AOPs. Strategies for enhancing catalytic performance such as element-doping, nanostructure design, and heterojunction construction are summarized in detail. The catalytic degradation mechanisms are also discussed briefly.
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Yu F, Chen Y, Pan Y, Yang Y, Ma H. A cost-effective production of hydrogen peroxide via improved mass transfer of oxygen for electro-Fenton process using the vertical flow reactor. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116695] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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