Ru复合ZnO光催化固氮研究
Ru and ZnO Composites for Photo Catalytic Nitrogen Fixation

本文采用沉淀还原法制备了Ru复合ZnO催化剂，并考察它们光催化的固氮性能，并用X射线衍射(XRD)、紫外可见漫反射光谱(UV-Vis DRS)电化学工作站对催化剂进行了表征。结果表明，复合金属Ru后催化剂吸光范围向可见光范围移动，吸光强度逐渐增加，光生电子电阻减小，光生电子的迁移速率增大，光生电子与空穴的复合率降低，提高ZnO催化剂的光催化固氮性能。当ZnO与Ru的物质的量比为9:1，干燥温度为60℃时，所制备的Ru复合ZnO催化剂光催化固氮性能最佳，光催化固氮能力最大为8.52 μg？gcat^？1。
In this paper, Ru composite ZnO catalysts were prepared by precipitation reduction method and their photo catalytic nitrogen fixation properties were investigated, and the catalysts were charac-terized by X-ray diffraction (XRD) and UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS) electro-chemical workstation. The results showed that the absorbance range of the catalyst shifted to the visible range after the compound metal Ru, the absorbance intensity gradually increased, the photo generated electron resistance decreased, the migration rate of photo generated electrons increased, and the complexation rate of photo generated electrons and holes decreased, which improved the photo catalytic nitrogen fixation performance of the ZnO catalyst. The best photo catalytic nitrogen fixation performance of the prepared Ru composite ZnO catalyst was achieved when the material ratio of ZnO to Ru was 9:1 and the drying temperature was 60？C, and the maximum photo catalytic nitrogen fixation capacity was 8.52 μg·gcat^？1.