Pt-RGO-Cu_2O/TiO_2催化剂的制备及光催化制氢活性

Preparation and photocatalytic activity for hydrogen production of Pt-RGO-Cu_2O/TiO_2 composite photocatalysts

采用化学沉积法和溶剂热法制备了RGO-Cu_2O/TiO_2复合光催化剂。通过扫描电子显微镜(SEM)、X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、紫外-可见漫反射光谱(DRS)表征复合催化剂的微观形貌、结构和光学特性。以H2Pt Cl6为无机前驱体对其进行Pt负载,研究了不同石墨烯含量对制氢活性的影响及不同光源下的制氢活性。结果表明:该复合催化剂表现出较好的光催化制氢活性,其中石墨烯的质量分数为0.5%,氢气的产生量最高。

RGO-Cu_2O/TiO_2 composite photocatalysts were prepared by chemical precipitation and solvothermal methods. The micromorphology,structure and optical properties of the composite catalysts were characterized by scanning electron microscopy（ SEM）,X-ray diffraction（ XRD）,fourier transform infrared（ FT-IR）,and UV-Vis diffuse reflectance spectrum（ DRS）. The inorganic precursor of H2 PtCl_6 was used to load Pt. The effects of the content of graphene on hydrogen production activity under different irradiation were investigated. The results indicated that the composite photocatalysts have higher photocatalytic activity for hydrogen production. When the mass fraction of graphene was 0. 5%,the amount of hydrogen was the highest.