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采用化学共沉淀法制备了尖晶石型掺杂镉的Zn2SnO4粉体。通过X射线粉末衍射(XRD)进行表征,利用紫外可见吸收光谱(UV-Vis)测试技术,研究粉体结构及不同掺杂量对光催化活性的影响,确定最佳掺杂量和热处理温度。以波长λ=312nm的光源对茜素红水溶液进行光催化降解实验,讨论光催化剂用量、染料浓度、催化剂焙烧温度及时间、试液的pH值、光照时间等与染料脱色率的关系。结果表明.该复合氧化物粉体属立方晶系,组成为(Cd0.06Zn0.94)2SnO4。在实验条件下,Cd~(2+)的加入使Zn2SnO4的光催化活性明显提高。
Spinel Zn2SnO4 powder doped with cadmium was prepared by chemical coprecipitation method. Characterization by X-ray powder diffraction (XRD), the use of UV-Vis absorption spectroscopy (UV-Vis) testing technology to study the effect of powder structure and different doping amount on the photocatalytic activity, to determine the optimal doping amount and heat treatment temperature. The photocatalytic degradation of alizarin red aqueous solution with a light source of wavelength λ = 312nm was carried out. The relationship between the amount of photocatalyst, the concentration of dye, the temperature and time of catalyst calcination, the pH value of the solution, the illumination time and the decolorization rate of the dye were discussed. The results show that the composite oxide powder belongs to the cubic system with the composition of (Cd0.06Zn0.94) 2SnO4. Under the experimental conditions, the addition of Cd 2+ significantly increased the photocatalytic activity of Zn 2 SnO 4.