石墨烯-CuO/TiO_2复合催化剂的合成及光催化制氢活性  

Fabrication and photocatalytic activity for hydrogen evolution of graphene-CuO/TiO_2 composite photocatalysts

作　　者：涂盛辉[1] 胡亚平[1] 张婷[1] 朱敏剑 梁海营[1] 彭海龙[1] 杜军[1] 

机构地区：[1]南昌大学资源环境与化工学院,南昌330031

出　　处：《功能材料》2016年第4期11-16,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21201098;51162022)

摘　　要：采用溶剂热法合成了石墨烯-CuO/TiO_2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H_2PtCl_6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TiO_2对可见光的利用及光催化分解C_2H_5OH/H_2O制氢活性。在可见光下照射5h后,样品的产氢量达到1 083.54μmol,太阳光光照5h后产氢量(4 374.51μmol)为P25(1598.25μmol)的2.74倍。Graphene-CuO/TiO_2 composite catalyst was prepared by and solvent thermal methods.The micromorphology,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 infrared(FT-IR),UV-Vis diffuse reflectance(DRS).The inorganic precursor of H_2PtCl_6 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 graphene 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 C_2H_5OH/H_2O of TiO_2.The hydrogen production was up to 1 083.54μmol under visible light irradition for 5h,while its hydrogen production(4 374.51μmol)was 2.74 times of P25(1 598.25μmol)under sunlight irradition for 5h.

关 键 词：溶剂热法 光催化 制氢 

分 类 号：O643[理学—物理化学]