摘要
The prepared TiO2 suspension by sol-gel and hydrothermal method is spread on conducting glass substrates to prepare the photoelectrodes.The degradation of RhB at different bias under visible irradiation is researched.By the examination of UV-visible spectroscopy、degraded intermediates and removal yield of total organic carbon,the effect of bias on the photoelectrocatalytic degradation of RhB is investigated.It is found that N-dealkylation process predominates at positive bias(+0.6V vs SCE).Five N-de-ethylated intermediates are detected by HPLC.The removal yield of TOC is low,though dye RhB also discolors.But a rather facile cleavage of the whole conjugated chromophore structure of RhB at negative bias of-0.6 V vs SCE leads to the high mineralization yield.
The prepared TiO2 suspension by sol-gel and hydrothermal method is spread on conducting glass substrates to prepare the photoelectrodes. The degradation of RhB at different bias under visible irradiation is researched. By the examination of UV-visible spectroscopy,degraded intermediates and removal yield of total organic carbon, the effect of bias on the photoelectrocatalytic degradation of RhB is investigated. It is found that N-dealkylation process predominates at positive bias（ ＋ O. 6V vs SCE）. Five N- de-ethylated intermediates arc detected by HPLC. The removal yield of TOC is low, though dye RhB also discolors. But a rather facile cleavage of the whole conjugated chromophore structure of RhB at negative bias of-0. 6 V vs SCE leads to the high mineralization yield.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2009年第2期277-280,共4页
Chemical Research and Application
基金
河南省科技攻关项目(0624440034)
河南理工大学博士基金(B2008-58648265)资助项目
关键词
光电催化
染料RhB
偏压
脱乙基
矿化
photoelectrocatalysis
RhB
bias
N-de-ethylation
mineralization
