不同取代基卟啉衍生物敏化纳米TiO_2多孔膜电极的光电性质研究  

Photoelectrochemical Study of Nanoporous TiO_2 Electrodes Sensitized by Porphyrin Derivatives with Different Substituents

作　　者：潘凯[1] 刘兆阅[1] 徐金杰[1] 于苗[1] 王德军[1] 白玉白[1] 李铁津 

机构地区：[1]吉林大学化学学院,长春130023

出　　处：《高等学校化学学报》2004年第5期934-937,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号:2 0 0 73 0 16;2 9973 0 2 6);国家"九七三"项目计划资助

摘　　要：采用含有不同取代基的卟啉衍生物四羟基苯基卟啉 ( THPP)和四羧基苯基卟啉 ( TCPP)分别对纳米Ti O2 多孔膜电极进行敏化 .对两种敏化电极进行了 UV-Vis光谱、FTIR光谱和 X射线光电子能谱 ( XPS)测试 .结果表明 ,Ti O2 与 TCPP的作用比与 THPP的作用强 .在相同浸泡条件下 ,Ti O2 电极吸附 TCPP的量大于吸附 THPP的量 .将两种敏化电极分别组装成光电化学电池 ,从正背两个方向照射光电池 ,研究它们在不同照射方向下的光电流响应 .从光电化学电池的 I-V曲线计算 TCPP敏化的光电化学池的总光电转换效率( η)为 0 .1 3 % ,而 THPP敏化的光电化学电池的 η为 0 .0 6% .Nanoporous TiO 2 electrodes were sensitized by different porphyrin derivatives, terahydro- xyphenyl porphyrin(THPP) and teracarboxylphenyl porphyrin(TCPP). Both kinds of the sensitized electrodes were characterized by UV-Vis, FTIR and XPS. The results show that the interaction between TiO 2 and TCPP was stronger than that between TiO 2 and THPP. Under the same soaking conditions the amount of TCPP adsorbed by TiO 2 electrode was more than that of THPP adsorbed by TiO 2 electrode. Both kinds of the sensitized electrodes were assembled to photoelectrochemical cells. The photocurrent responses of the photoelectrochemical cell under different illumination directions were studied. Calculated from the current-voltage curve of photoelectrochemical cells, the overall light-to-electric energy conversion yield(η) of TCPP-sensitized cell was 0.13%, while the conversion efficiency of THPP-sensitized cell was 0.06%.

关 键 词：纳米二氧化钛多孔膜电极 取代基 卟啉衍生物 敏化剂 光电流作用谱 总光电转换效率 光电化学电池 

分 类 号：O614.411[理学—无机化学] O646[理学—化学]