【摘要】 采用水热法以HF作为结构调控剂合成了主要暴露（D01）面的锐钛矿TiO₂纳米片,通过光沉积方法分别合成了负载Ru和RuO₂物种的光催化剂.利用X射线衍射、透射电镜和氢气程序升温还原等分析表征了催化剂的结构性质.通过光解水产氧反应来研究催化剂的催化性能,详细考察了Ru含量、负载方式以及氧化和还原处理等因素的影响,光解水产氧速率的差异证明了Ru物种在不同晶面的电荷-空穴分离效应.与负载单一助催化剂的Ru/TiO₂和RuO₂/TiO₂样品相比,活性最优的0.5%Ru-1.0%RuO₂/TiO₂样品由于负载了双助催化剂,其催化活性得到更大的提高,证实了在锐钛矿TiO₂上的晶面电荷-空穴分离效应.更多还原

【Abstract】 TiO₂ nanosheets mainly exposed（001） facet were prepared through a hydrothermal process with HF as the morphology-directing agent.Ru and RuO₂ species were loaded by photodeposition methods to prepare the photocatalysts.The structural features of the catalysts were characterized by X-ray diffraction,transmission electron microscopy,inductively coupled plasma atomic emission spectrum,and H₂ Temperature-programmed reduction.The photocatalytic property was studied by the O₂ evolution from water oxidation,which was examined with respect to the influences of Ru contents as well as the oxidation and reduction treatments,suggesting the charge separation effect of the Ru species co-catalysts on different facets of TiO₂ nanosheets.In contrast to Ru/TiO₂ and RuO₂/TiO₂ with the single deposited co-catalyst,the optimized catalyst 0.5%Ru-1.0%RuO₂/TiO₂ with dual co-catalysts achieved a much improved catalytic performance,in terms of the synergetic effect of dual co-catalysts and the enhanced charge separation effect.更多还原