Orientation Dependence of Photochemical Reactions on TiO2 Surfaces
Orientation Dependence of Photochemical Reactions on TiO2 Surfaces
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DOI：
10.1021/jp980104k
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发表时间：
1998-04
影响因子：
3.3
通讯作者：
P. Hotsenpiller;J. Bolt;W. Farneth;J. B. Lowekamp;G. Rohrer
中科院分区：
文献类型：
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作者：
P. Hotsenpiller;J. Bolt;W. Farneth;J. B. Lowekamp;G. Rohrer
取向的金红石表面的光化学已被检查使用光还原Ag+到Ag金属从水溶液到TiO 2表面上。金红石薄膜的光化学反应速率和量子产率是金红石表面取向的函数。（100）和（110）金红石取向具有比（101）、（111）和（001）更低的光还原速率。在一定范围的光强度、照明波长和膜厚度上观察到光化学反应速率对膜表面取向的这种依赖性。原子力显微镜已被用来表征薄膜表面的形貌和光还原银在这些表面。金红石的表面形态，表面化学，空间电荷现象，和电荷输运的几个属性，讨论了它们可能的贡献的金红石薄膜上的光化学的取向依赖。
The photochemistry of oriented rutile surfaces has been examined using the photoreduction of Ag+ to Ag metal from an aqueous solution onto the TiO2 surfaces. The photochemical reaction rates and quantum yields of rutile films were found to be a function of the orientation of the rutile surface. The (100) and (110) rutile orientations have lower photoreduction rates than the (101), (111), and (001). This dependence of the photochemical reaction rates on film surface orientation is observed over a range of light intensities, illumination wavelengths, and film thicknesses. Atomic force microscopy has been used to characterize the morphologies of the film surfaces and the photoreduced Ag at these surfaces. Several properties of rutile, such as the surface morphology, surface chemistry, space charge phenomena, and charge transport, are discussed in relation to their possible contributions to the orientation dependence of the photochemistry on the rutile films.