Photocurrent-boosting by intramembrane electron mediation between titania nanoparticles dispersed into nafion-porphyrin composites
Photocurrent-boosting by intramembrane electron mediation between titania nanoparticles dispersed into nafion-porphyrin composites
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DOI：
10.1021/cm050692w
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发表时间：
2005-06
影响因子：
8.6
通讯作者：
A. Ikeda;Youichi Tsuchiya;Toshifumi Konishi;S. Ogasawara;J. Kikuchi
中科院分区：
文献类型：
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作者：
A. Ikeda;Youichi Tsuchiya;Toshifumi Konishi;S. Ogasawara;J. Kikuchi
我们已经使用二氧化钛纳米粒子（TiO 2）建立一个简便的制备高度photoresonable膜。一种改进的光电流发生器很容易制备使用旋涂的Nafion/卟啉/TiO 2混合物上的铟-锡-氧化物基板。所产生的光电流密度比不存在TiO 2时高约10倍。所得电极显示出明显的光电流产生，尽管存在源自高染料浓度的障碍（即，光激发态的自猝灭）和膜厚度（即，通过膜进入电极的电子流损失）。光电流密度线性增加伴随着高的表面浓度的卟啉和高膜厚度。很明显，TiO 2通过膜内电子介导有助于更有效地产生光电流。
We have used titania nanoparticles (TiO2) to establish a facile preparation of a highly photoresponsible membrane. An improved photocurrent generator was prepared easily using spin coating of a Nafion/porphyrin/TiO2 mixture on an indium−tin−oxide substrate. Generated photocurrent density was about 10 times higher than that in the absence of TiO2. The resultant electrode shows distinct photocurrent generation despite impediments derived from high dye-concentration (i.e., self-quenching of photoexcited states) and membrane thickness (i.e., losses of electron flow passing through membrane into electrode). Photocurrent densities increased linearly concomitant with high surface concentrations of porphyrin and high membrane thickness. It became evident that TiO2 contributes to more efficient photocurrent generation by intramembrane electron mediation.