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以硝酸铋作为铋源,偏钒酸铵作为钒源,利用水热法合成钒酸铋前驱体,并以此作为载体,采用沉淀和光还原法将Ag@AgCl负载其上,制备了Ag@AgCl/BiVO_4复合光催化剂。同时,利用X射线粉末衍射仪、紫外-可见漫反射光谱、X射线光电子能谱对所制备的复合催化剂进行表征。结果表明,BiVO_4经过负载Ag@AgCl进行修饰后,对可见光的响应吸收更加明显,复合物的光催化活性有明显提高。通过可见光照射催化降解甲基橙的实验,可发现该复合光催化剂对甲基橙的降解效率较纯BiVO_4提高了约73%。
Using bismuth nitrate as bismuth source and ammonium metavanadate as vanadium source, the precursor of bismuth vanadate was synthesized by hydrothermal method and supported on Ag @ AgCl by precipitation and photoreduction method to prepare Ag @ AgCl / BiVO_4 composite photocatalyst. At the same time, the prepared composite catalysts were characterized by X-ray powder diffraction, UV-visible diffuse reflectance spectroscopy and X-ray photoelectron spectroscopy. The results showed that the BiVO_4 was modified by Ag @ AgCl, the absorption of visible light was more obvious, and the photocatalytic activity of BiVO_4 was obviously improved. The visible light irradiation of methyl orange degradation experiments showed that the photocatalyst degradation of methyl orange degradation efficiency than pure BiVO_4 increased by about 73%.