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....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.展开更多
文摘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.
