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TiO2／Ti電極上外加陽(yáng)極偏壓對(duì)亞甲基藍(lán)光催化降解的影響
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TG146

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Effect of Applied Anodic Potential Bias on TiO2 Electrode upon Photocatalytic Degradation of Methylene Blue
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    摘要:

    主要研究了在納米多孔TiO2／Ti電極上外加陽(yáng)極偏壓對(duì)亞甲基藍(lán)光催化降解的影響。另外還討論了在TiO2／Ti中摻雜過(guò)渡族金屬離子對(duì)亞甲基藍(lán)降解情況的影響。降解程度通過(guò)亞甲基藍(lán)的褪色情況來(lái)表征。實(shí)驗(yàn)結(jié)果表明，降解效率隨著所加陽(yáng)極偏壓的增大而增大，直到陽(yáng)極偏壓達(dá)到3．5V，增大速率開始減小。摻雜Mn^2＋和Cr^3＋可以促進(jìn)光電催化效率，而摻雜Ni^2＋卻會(huì)降低光電催化效率。離子半徑和各離子的功函數(shù)可以解釋這種現(xiàn)象。

    Abstract:

    The effect of applied anodic bias upon the photoelectrocatalytic degradation of methylene blue under ultraviolet illumination on nanoporous undoped TiO2/Ti electrode was studied in the present paper. The influence of doping different transition metal ions in TiO2/Ti on the degradation of methylene blue was also investigated.. The degradation degree was characterized with decolorization of methlylene blue. The results indicate that the degradation efficiency increases with increasing of the applied anodic bias up to 3.5 V, then decreases gradually. Doping TiO2 with Mn2+ and Cr3+ will enhance the efficiency of photoelectrocatalytic, while depositing Ni2+ on the TiO2 film shows a decrease of photoelectrocatalytic efficiency. The above metioned phenomena are attributed to ionic radii and the electron work functions values of the differently doped ions.

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孫憲榮 沈嘉年 愛(ài)可可 劉東 李謀成 孫娟. TiO2／Ti電極上外加陽(yáng)極偏壓對(duì)亞甲基藍(lán)光催化降解的影響[J].稀有金屬材料與工程,2006,35(11):1770~1774.[Sun Xianrong, Shen Jianian, Ekoko, Liu Dong, Li Moucheng, Sun Juan. Effect of Applied Anodic Potential Bias on TiO2 Electrode upon Photocatalytic Degradation of Methylene Blue[J]. Rare Metal Materials and Engineering,2006,35(11):1770~1774.]
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  • 收稿日期:2005-11-21
  • 最后修改日期:2005-11-21
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