采用沉积-沉淀法制备了Au/TiO2光催化剂,并用紫外-可见漫反射光谱和X射线光电子能谱对其进行了表征,详细考察了室温水汽的引入对Au/TiO2光催化分解臭氧活性的影响.结果表明,同干燥状态时相比,室温引入水汽后催化剂活性较低,并且较快地达到了稳定值.催化剂的O 1s和Au 4f的XPS分析结果表明,水汽的存在导致TiO2的表面结构发生变化,进而使金-载体之间的相互作用力减弱.这是导致催化剂活性下降的主要原因.
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