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.
作者
乔启成
李亚
金洁蓉
石健
赵勤
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)
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
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)
关键词
粒子电极
酸性橙II
电催化氧化
降解路径
反应机理
particle electrode
Acid Orange II
electro-catalytic oxidation
degradation pathway
reaction mechanism
