论文部分内容阅读
以碘化铵和二氰二胺为原料,采用水浴-锻烧法制备了SiO_2/碘氮化碳(CNI)复合光催化剂。利用透射电子显微镜(TEM)、紫外-可见漫反射光谱(UV-Vis DRS)等方法对催化剂进行了表征。以亚甲基蓝、甲基橙分别为光催化反应模型化合物,评价了SiO_2/CNI的可见光催化活性。研究结果表明,与纯CNI相比,CNI/SiO_2复合光催化剂具有更高的催化活性,当SiO_2与CNI的质量比为1∶15时,光催化剂的降解率达到最高点,在该优化条件下,可见光照射40min,SiO_2/CNI光催化降解亚甲基蓝的降解率达到66.8%,光催化降解甲基橙的降解率达到23.7%。
Using ammonium iodide and dicyandiamide as raw materials, SiO 2 / carbonitride (CNI) composite photocatalyst was prepared by water bath-calcination method. The catalysts were characterized by transmission electron microscopy (TEM) and UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS). With methylene blue and methyl orange as photocatalytic reaction model compounds respectively, the visible light catalytic activity of SiO 2 / CNI was evaluated. The results show that compared with pure CNI, CNI / SiO 2 composite photocatalyst has higher catalytic activity. When the mass ratio of SiO 2 to CNI is 1:15, the degradation rate of photocatalyst reached the highest point. Under the optimal conditions , The visible light irradiation 40min, SiO 2 / CNI photocatalytic degradation of methylene blue degradation rate of 66.8%, photocatalytic degradation of methyl orange degradation rate of 23.7%.