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以钼酸铵、硝酸铅为原料,采用水热法合成了纳米PbMoO_4光催化剂,并采用光还原处理对其进行表面载Ag修饰。借助X-射线粉末衍射(XRD)、扫描电镜(FE-SEM)和紫外-可见吸收光谱(UV-Vis)等测试手段对样品进行表征,并以罗丹明B为模型污染物,考察了纳米PbMoO_4光催化剂的催化活性,研究了样品的制备条件和表面载银对催化剂活性的影响。XRD分析结果表明,所得样品为四方晶系结构,且产物纯度高;样品的形貌分析和光催化活性实验结果表明,水热体系的pH值对产物的形貌和活性影响显著,且表面载银可显著提高催化剂的可见光催化活性。
Ammonium molybdate and lead nitrate were used as raw materials to synthesize the nano-PbMoO_4 photocatalyst by hydrothermal method. The photocatalyst was surface-modified by photoreduction. The samples were characterized by means of X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and UV-Vis absorption spectroscopy. Rhodamine B was used as model pollutant and the effects of PbMoO4 The photocatalytic activity of the catalyst was investigated. The preparation conditions of the sample and the effect of surface silver loading on the catalyst activity were studied. XRD results showed that the obtained sample was tetragonal crystal structure with high purity. The morphology and photocatalytic activity of the sample showed that the pH value of the hydrothermal system had a significant effect on the morphology and activity of the product, and the silver Can significantly improve the visible light catalytic activity of the catalyst.