Diffusion properties of dye molecules in nanoporous TiO2 networks

被引：31

作者：

Dürr, M ^{[1
]}

Schmid, A ^{[1
]}

Obermaier, M ^{[1
]}

Yasuda, A ^{[1
]}

Nelles, G ^{[1
]}

机构：

[1] Sony Deutschland GmbH, Mat Sci Lab, D-70327 Stuttgart, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2005年 / 109卷 / 17期

关键词：

D O I：

10.1021/jp044203b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The adsorption of ruthenium-dye molecules out of ethanol solution onto TiO2 particles of nanoporous TiO2 films was used to study the molecules' diffusion through these layers by means of optical absorption spectrometry. Dependent on pore size, porosity, and particle size, effective diffusion constants as low as D-eff = 4 x 10(-9) cm(2)/s were deduced from the uptake curves by applying a simple model for combined diffusion and adsorption. These diffusion constants for diffusion through the nanoporous network are up to 3 orders of magnitude lower than in bulk ethanol and are discussed with respect to the properties of the nanoporous material.

引用

页码：3967 / 3970

页数：4

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