中文摘要：

以ZnCl2、Ga（NO3）3·xH2O、CoCl2·6H2O为原料，采用水热法制备了立方晶型的Zn1-xCoxGa2O4光催化剂，用X射线衍射（XRD）、扫描电子显微镜（SEM）、紫外漫反射（UV-Vis）、X射线光电子能谱（XPS）等测试手段对催化剂进行了表征，结果表明， Co成功地掺入到ZnGa2O4晶格内， Co的掺入能够影响催化剂的形貌，缩小催化剂的禁带宽度.光催化降解罗丹明B溶液实验结果表明， Co的掺入提高了催化剂的催化活性，掺入量为x＝0．010的Zn1-xCoxGa2O4具有最佳的光催化性能，同时Zn1-xCoxGa2O4样品对罗丹明B溶液的光催化降解反应符合伪一级反应动力学规律.并对Co掺入后光催化活性提高的机理进行了讨论.

英文摘要：

The cubic Zn1-xCoxGa2O4 photocatalysts were synthesized by hydrothermal method using ZnCl2, Ga(NO3)3??xH2O, CoCl2??6H2O as raw material. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), UV-Vis diffusion reflectance spectra (UV-Vis)and X-ray photoelectron spectroscope (XPS). The results indicate that the Co was successfully incorporated into the ZnGa2O4 lattice, and Co doping can influence the crystalline morphology and narrow the band gap of photocatalysts. The experi-ments of photocatalytic degradation of RhB results demonstrate that Co doping can greatly enhance the photo-catalytic activity of Zn1-xCoxGa2O4. When Co dopant was x=0.010, the photocatalytic activity reaches the maximum. Moreover, the photocatalytic degradation of RhB follows a pseudo-first-order reaction. The mecha-nism of enhanced photocatalytic activity was also discussed.