采用溶剂热法合成了石墨烯-CuO/TiO2复合催化剂,通过扫描电镜(SEM)、透射电镜(TEM)、X 射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、紫外-可见漫反射(DRS)表征复合催化剂的微观形貌、结构和光学特性。以 H2 PtCl6为无机前驱体对其进行 Pt 负载,研究了不同石墨烯负载量对制氢活性的影响及太阳光下的制氢活性。结果表明,石墨烯负载量为0．5％(质量分数)时,复合催化剂制氢活性最高,石墨烯和CuO 协同作用提高了TiO2对可见光的利用及光催化分解 C2 H5 OH/H2 O 制氢活性。在可见光下照射5 h 后,样品的产氢量达到1083．54μmol,太阳光光照5 h后产氢量(4374．51μmol)为P25(1598．25μmol)的2．74倍。
Graphene-CuO/TiO2 composite catalyst was prepared by and solvent thermal methods.The micro-morphology,structure and optical properties of the composite catalysts were characterized by scanning electron microscopy (SEM),transmission electron microscopy (TEM),X-ray diffraction (XRD),fourier transform in-frared (FT-IR),UV-Vis diffuse reflectance (DRS).The inorganic precursor of H2 PtCl6 was used to load Pt. The effects of the content of graphene loading on hydrogen production activity under different irradiation were investigated.The results showed that the photocatalytic activity for hydrogen production was best with the gra-phene content of 0.5wt%.The co-existence of CuO and graphene could produce a synergistic effect,which could improve the utilization of visible light and further enhance the photocatalytic activity for hydrogen production of decompositing C2 H5 OH/H2 O of TiO2 .The hydrogen production was up to 1 083.54μmol under visible light ir-radition for 5 h,while its hydrogen production (4 374.51μmol)was 2.74 times of P25 (1 598.25μmol)under sunlight irradition for 5 h.
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