中文摘要：

一条宽带红外线的表面和频率产生震动的光谱学(SFG -- 对) 并且一在里面紫外刺激安装奉献给学习表面光催化的 situ 被构造了。与一个自制紧缩的高真空房间， TiO2 薄电影表面上的器官的沾染物由磁控管劈啪作响在在 10 kPa O2 空气在 266 nm 照耀下面移开的 situ 的 RF 准备了。我们在与在房间温度改变甲醇压力在 TiO2 表面上拉长颤动区域的 CH3 获得了甲醇光谱。分子、分离的甲醇的特征， methoxy，在这表面上吸附了被解决。CH3 分子的甲醇的对称的拉长颤动频率和费密回声由大约 68 cm1 从是转移红的对高范围低。而且，在真空的表面上的分离甲醇和 H 的再结合也被观察。我们的结果建议二 equilibria 存在：在在表面上的煤气的阶段和那的分子的甲醇之间，并且在表面上的分子的甲醇和分离甲醇之间。

英文摘要：

A broadband infrared surface sum frequency generation vibrational spectroscopy （SFG-VS） and an in situ UV excitation setup devoted to studying surface photocatalysis have been constructed. With a home-made compact high vacuum cell, organic contaminants on TiO2 thin film surface prepared by RF magnetron sputtering were in situ removed under 266 nm irradiation in 10 kPa 02 atmosphere. We obtained the methanol spectrum in the CH3 stretching vibration region on TiO2 surface with changing the methanol pressure at room temperature. Features of both molecular and dissociative methanol, methoxy, adsorbed on this surface were resolved. The CH3 symmetric stretching vibration frequency and Fermi resonance of molecular methanol is red-shifted by about 6-8 cm-1 from low to high coverage. Moreover, the recombination of dissociative methanol and H on Surfaces in vacuum was also observed. Our results suggest two equilibria exist： between molecular methanol in the gas phase and that on surfaces, and between molecular methanol and dissociative methanol on surfaces.