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题名: Oxidative degradation of azo dye by hydrogen peroxide electrogenerated in situ on anthraquinonemonosulphonate/polypyrrole composite cathode with heterogeneous CuO/gamma-Al2O3 catalyst
作者: Zhang, Guoquan1;  Wang, Shuai1;  Zhao, Sha1;  Fu, Lei2;  Chen, Guohua3;  Yang, Fenglin1
关键词: Anthraquinone ;  Copper oxide ;  EAOPs ;  Heterogeneous ;  Hydroxyl radical
刊名: APPLIED CATALYSIS B-ENVIRONMENTAL
发表日期: 2011-08-11
DOI: 10.1016/j.apcatb.2011.05.042
卷: 106, 期:3-4, 页:370-378
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Environmental ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Heterogeneous electrocatalytic wet H2O2 oxidation technique for the removal of azo dye amaranth from aqueous solution was studied in the presence of solid CuO/gamma-Al2O3 catalyst and anthraquinonemonosulphonate/polypyrrole (AQS/PPy) composite cathode able to electrogenerate H2O2 in situ. The spherical CuO/gamma-Al2O3 catalysts with various CuO loadings and calcined at different temperatures were characterized by BET, ESEM-EDS, XRD and XPS. Several parameters affecting H2O2 electrogeneration and dye degradation such as solution pH, cathode potential (E-ca), oxygen flow rate (V-O2), CuO loading, reaction temperature as well as catalyst calcination temperature were investigated. Experimental results revealed that the optimal condition for H2O2 electrogeneration on the AQS/PPy composite modified cathode is V-O2 = 0.4 ml min(-1), E-ca = 0.4V and pH 4.3. On this occasion, ca. 90% chroma decay and 60% TOC removal of dye were achieved with 450 degrees C-calcined 5.78 wt%-CuO/gamma-Al2O3 catalyst and 70 degrees C reaction temperature. Dye degradation follows the second-order kinetics. Leaching tests showed that the leaching copper amount during the oxidation is only 4.0-7.0% per run and the role of heterogeneous activity is dominant. The catalytic activity of CuO/gamma-Al2O3 catalyst could be recovered after multiple runs by a re-calcination step. Furthermore, the stability of the AQS/PPy composite after consecutive operation was also investigated by chronoamperometric and EIS techniques. (C) 2011 Elsevier B.V. All rights reserved.
关键词[WOS]: 2-CHLOROPHENOL EMPLOYING GOETHITE ;  PHOTOELECTRO-FENTON DEGRADATION ;  DOPED DIAMOND ANODES ;  ELECTRO-FENTON ;  ELECTROCHEMICAL OXIDATION ;  AQUEOUS-MEDIUM ;  HYDROXYL RADICALS ;  WATER ;  ACID ;  DECOMPOSITION
语种: 英语
WOS记录号: WOS:000294092400012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142445
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Dalian Univ Technol, Minist Educ, Key Lab Ind Ecol & Environm Engn, Sch Environm Sci & Technol, Dalian 116024, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Fuel Cell Syst & Engn Lab, Dalian 116023, Peoples R China
3.Hong Kong Univ Sci & Technol, Dept Chem Engn, Kowloon, Hong Kong, Peoples R China

Recommended Citation:
Zhang, Guoquan,Wang, Shuai,Zhao, Sha,et al. Oxidative degradation of azo dye by hydrogen peroxide electrogenerated in situ on anthraquinonemonosulphonate/polypyrrole composite cathode with heterogeneous CuO/gamma-Al2O3 catalyst[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2011,106(3-4):370-378.
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