Sn-Ce-Sb/γ-Al2O3粒子电极体系降解AOⅡ的历程与机理  

Reaction pathway and mechanism of the degradation of acid orange Ⅱ by Sn-Ce-Sb/γ-Al_2O_3 particle electrodes

作　　者：乔启成 李亚 金洁蓉 石健[3] 赵勤[3] QIAO Qi-cheng;LI Ya;JIN Jie-rong;SHI Jian;ZHAO Qin(School of Environment and Biological Engineering Nantong College of Science and Technology. Nantong 226007, China;Nantong Key Laboratory of Solid Waste Reuse,Nantong 226007, China;School of Chemical Engineering and Technology, Nantong University, Nantong 226007,China)

机构地区：[1]南通科技职业学院环境与生物工程学院,江苏南通226007 [2]南通市固体废弃物资源化利用重点实验室,江苏南通226007 [3]南通大学化工学院,江苏南通226007

出　　处：《中国环境科学》2017年第7期2607-2614,共8页China Environmental Science

基　　金：国家自然科学基金资助项目(21177067);江苏省自然科学基金青年基金资助项目(BK20150402);江苏省高校“青蓝工程”资助项目(苏教师[2016]15号);江苏省333高层次人才培养工程资助项目(BRA2016195);江苏高校境外研修计划资助项目(苏教办师[2015]7号);南通市科技计划项目(GY12016055)

摘　　要：采用自制的Nd掺杂PbO_2阳极和Sn-Ce-Sb/γ-Al_2O_3粒子,研究了二维电极、γ-Al_2O_3和Sn-Ce-Sb/γ-Al_2O_3填充的三维电极体系对于酸性橙Ⅱ(AOⅡ)的降解性能,利用紫外可见光谱(UV-vis)、傅里叶红外光谱(FTIR)、气相色谱-质谱(GC-MS)对降解产物进行了分析.研究结果表明,Sn-Ce-Sb/γ-Al_2O_3粒子电极体系对AOⅡ具有更优越的电催化氧化性能,TOC去除率相较于二维电极以及γ-Al_2O_3粒子电极分别提高了近1.95和1.70倍,能耗相应降低了41%和25%.根据对产物的分析,提出了Sn-Ce-Sb/γ-Al_2O_3粒子电极体系中AOⅡ可能的降解路径.结合实验结果,通过羟基自由基(·OH)的形成过程分析,进一步提出了该体系中可能存在的反应机理.Nd modified PbO2anode and Sn-Ce-Sb/γ-Al2O3particle electrode,which were made in our laboratory,were used to prepare two-dimensional electrode,three-dimensionalγ-Al2O3particle electrode and three-dimensional Sn-Ce-Sb/γ-Al2O3particle electrode for the degradation of acid orange II(AOII).To identify the reaction intermediate products,UV-vis,FTIR and GC-MS were applied.On the basis of the AOII degradation results and kinetics analysis,in the three-dimensional Sn-Ce-Sb/γ-Al2O3particle electrode reactor,TOC removal rate was1.95and1.70times higher than using two-dimensional electrode and three-dimensionalγ-Al2O3particle electrode,and energy consumption had reduced by41%and25%,respectively.According to the analysis of the main reaction intermediates,a possible degradation pathway was proposed for AOII degradation by Sn-Ce-Sb/γ-Al2O3particle electrode.And finally,a reaction mechanism was also proposed based on all the experimental results.

关 键 词：粒子电极 酸性橙II 电催化氧化 降解路径 反应机理 

分 类 号：X703.1[环境科学与工程—环境工程]