工业水处理 ›› 2013, Vol. 33 ›› Issue (5): 22-24. doi: 10.11894/1005-829x.2013.33(5).7

• 试验研究 • 上一篇    下一篇

斜板液膜法光电催化罗丹明B的降解机理初探

徐云兰1, 钟登杰1, 贾金平2   

  1. 1. 重庆理工大学化学化工学院, 重庆 400054;
    2. 上海交通大学环境科学与工程学院, 上海 200240
  • 收稿日期:2013-03-04 出版日期:2013-05-20 发布日期:2013-05-22
  • 作者简介:张明明(1987- ),硕士
  • 基金资助:

    国家自然基金重点项目(20937003);国家自然科学基金面上项目(21077140);重庆市科委自然科学基金项目(cstc2011jjA0835);重庆市教委科学技术研究项目(KJ110801)

Discussion on the degradation mechanism of Rhodamine B in thephotoelectrocatalytic process using a slant-placedTiO 2 /Ti anode thin-film reactor

Xu Yunlan1, Zhong Dengjie1, Jia Jinping2   

  1. 1. School of Chemistry & Chemical Engineering, Chongqing University of Science & Technology, Chongqing 400054, China;
    2. School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China
  • Received:2013-03-04 Online:2013-05-20 Published:2013-05-22

摘要:

采用斜板液膜法光电催化降解染料罗丹明B(RhB),用分光光度法考察了其紫外-可见吸收光谱随时间的变化;色谱-质谱联用仪考察了RhB降解过程中的中间产物;总有机碳分析仪考察了RhB的矿化情况。研究结果表明,RhB主要是通过被氧化而降解,首先是RhB的芳环被打开,其产物进而被氧化成小分子的有机酸,最终被氧化为CO2和H2O。

关键词: 斜板液膜反应器, TiO2/Ti电极, 光电催化, 罗丹明B

Abstract:

Rhodamine B( RhB )has been treated by photoelectrocatalytic( PEC )degradation using a slant-placedanode thin-film reactor.The UV-Vis spectra of RhB which changes with time are investigated by spectrophotometry.The intermediate produced in the process of degradation is investigated by combined chromatography-massspectrography.The mineralization of RhB is investigated with the total organic carbon ( TOC ) analyzer. The resultsdemonstrate that RhB is degraded by oxidation principally. At the initial stage,aryl-chain is to be opened,and thenthe product is oxidized to form small molecule organic acid. Finally,the acid is oxidized to become CO2and H2O

Key words: slant-placed anode thin-film reactor, TiO2/Ti electrode, photoelectrocatalysis, Rhodamine B

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