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为发展可见光下破坏污染物的钴掺杂TiO2光催化剂,以CoCl2、Co(NO3)2和CoSO4为钴前驱体,采用溶胶-凝胶法制备了钴掺杂TiO2,通过X射线衍射、扫描电镜、BET表面积测试和紫外-可见吸收光谱对比研究了钴前驱体对样品的微观结构和吸光性能的影响．同时,以苯胺为降解目标物,比较了样品在可见光下的催化活性．结果表明,样品的TiO2晶相、形貌、比表面积和吸光性能都随着钴前驱体的不同而不同,其中以Co(NO3)2为前驱体制备得到的样品其光催化活性最高,特别是1％掺杂且400℃烧结得到的样品,并简要讨论了其可能原因．
In order to develop a cobalt-doped TiO2 photocatalyst that can destroy pollutants under visible light, a cobalt-doped TiO2 was prepared by sol-gel method using CoCl2, Co (NO3) 2 and CoSO4 as cobalt precursors. XRD and SEM , BET surface area test and UV-Vis absorption spectra were used to study the influence of cobalt precursor on the microstructure and absorbency of the sample. At the same time, aniline was used as the degradation target, and the catalytic activity of the sample under visible light was compared. The results showed that the crystalline phase, the morphology, the specific surface area and the light absorption properties of the samples varied with the cobalt precursors. The samples prepared with Co (NO3) 2 as precursors exhibited the highest photocatalytic activity, especially 1% doped and 400 ℃ sintered samples obtained, and briefly discussed the possible causes.