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Graphite felt incorporated with MoS2/rGO for electrochemical detoxification of high-arsenic fly ash
Luo, Yang1,2,3,4; Wu, Yinghong3,4,5; Huang, Chao1,2; Xiao, Dezhi1,2; Zhang, Lizhai1,2; Ma, Shuhua3; Qu, Jingkui3; Zheng, Shili3; Chu, Paul K.1,2
2020-02-15
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume382Pages:12
AbstractAccumulation of high-arsenic fly ash (HAFA) poses a serious environmental threat due to the toxicity of As and release of other heavy metals especially Cr. In this work, a novel graphite felt (GF) cathode modified with the nanoscale MoS2/reduced graphene oxide (rGO) heterojunction is prepared by blending with PTFE emulsion for efficient synergistic oxidative dissolution of As(III) and Cr(III) in HAFA. By taking advantage of the p-n junction characteristics of the heterojunction and appropriate hydrophobicity of the PTFE coating, the modified GF efficiently utilizes both dissolved O-2 and gaseous O-2 in the 2e(-) oxygen reduction reaction (ORR). Our theoretical assessment indicates that gaseous O-2 adsorbs stably on sulfur vacancies and is reduced by electrons transmitted from rGO. Experimentally, the modified GF shows superior ORR catalytic activity as exemplified by a high peak current density of 8.41 mA cm(-2) and onset potential of 0.53 V vs. RHE. center dot OH generated by the Cr and Fe-triggered autocatalysis mechanism promotes oxidization of As(III) and Cr(III) in detoxification of HAFA resulting in 96.1% As removal as well as 70.74% Cr removal in 135 min. The modified GF with excellent stability and durability has immense industrial prospect in detoxification of HAFA and treatment of other types of As-containing hazardous wastes.
KeywordArsenic Electrochemical detoxification Heterojunction Graphite felt Oxygen reduction reaction
DOI10.1016/j.cej.2019.122763
Language英语
WOS KeywordEFFICIENT H2O2 ELECTROGENERATION ; REDUCED GRAPHENE OXIDE ; ELECTRO-FENTON PROCESS ; HYDROGEN-PEROXIDE ; ULTRATHIN NANOSHEETS ; PERFORMANCE ; OXIDATION ; GENERATION ; CATHODE ; HETEROJUNCTION
Funding ProjectCity University of Hong Kong Strategic Research Grant (SRG)[7005105] ; National Natural Science Foundation of China[51774261]
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationCity University of Hong Kong Strategic Research Grant (SRG) ; National Natural Science Foundation of China
WOS IDWOS:000503381200120
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/38493
Collection中国科学院过程工程研究所
Corresponding AuthorZheng, Shili; Chu, Paul K.
Affiliation1.City Univ Hong Kong, Dept Mat Sci & Engn, Dept Phys, Kowloon, Hong Kong, Peoples R China
2.City Univ Hong Kong, Dept Biomed Engn, Kowloon, Hong Kong, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Natl Engn Lab Hydrometallurg Cleaner Prod Technol, Beijing 100190, Peoples R China
4.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
5.City Univ Hong Kong, Sch Energy & Environm, Kowloon, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Luo, Yang,Wu, Yinghong,Huang, Chao,et al. Graphite felt incorporated with MoS2/rGO for electrochemical detoxification of high-arsenic fly ash[J]. CHEMICAL ENGINEERING JOURNAL,2020,382:12.
APA Luo, Yang.,Wu, Yinghong.,Huang, Chao.,Xiao, Dezhi.,Zhang, Lizhai.,...&Chu, Paul K..(2020).Graphite felt incorporated with MoS2/rGO for electrochemical detoxification of high-arsenic fly ash.CHEMICAL ENGINEERING JOURNAL,382,12.
MLA Luo, Yang,et al."Graphite felt incorporated with MoS2/rGO for electrochemical detoxification of high-arsenic fly ash".CHEMICAL ENGINEERING JOURNAL 382(2020):12.
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