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采用程序升温脱附方法研究了甲醇分子吸附在真空退火后的二氧化钛(110)表面的光催化过程,对比分析了单独吸附甲醇分子以及甲醇分子与水分子共吸附情况下的光催化解离过程.结果表明,在二氧化钛(110)表面吸附的甲醇分子对共吸附水分子的光催化解离过程并没有直接的帮助作用.共吸附状态下的水分子也同样没有影响到甲醇的光致解离过程,但是水分子的存在抑制了甲醇光解产物甲醛的光致脱附过程,同时促进了甲酸甲酯的形成.
The temperature-programmed desorption process was used to study the photocatalytic process of methanol molecules adsorbed on the surface of titanium dioxide (110) after vacuum annealing. The photocatalytic dissociation process of methanol molecules adsorbed by itself and the co-adsorption of methanol and water molecules was analyzed. The results showed that the methanol molecules adsorbed on the surface of TiO 2 did not play a direct role in the photocatalytic dissociation of co-adsorbed water molecules, and the water molecules in the co-adsorbed state also did not affect the photodissociation of methanol , But the presence of water molecules inhibits the photodegradation of the methanol photolysis product formaldehyde and promotes the formation of methyl formate.