论文部分内容阅读
以膨润土为载体,硝酸锌、硝酸铈和氢氧化钠为原料,采用沉淀法制备了Ce掺杂ZnO/膨润土复合光催化材料.利用X射线衍射(XRD)、红外光谱仪(FT-IR)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、氮气吸附仪等对其进行表征,并通过对亚甲基蓝(MB)溶液脱色反应,考察紫外光照射下复合材料的光催化性能.结果表明,复合光催化材料中由于Ce掺杂ZnO的光催化作用与膨润土的吸附性相互协同,显示出优良的光催化活性和稳定性.当Ce的掺杂量为3.0%,同时复合光催化材料的加入量为20 mg/L,MB溶液的pH值为6时,复合光催化材料的性能最优,在紫外灯下照射2 h后,MB溶液的脱色率达到98.6%.
Ce-doped ZnO / bentonite composite photocatalyst was prepared by the precipitation method using bentonite as carrier, zinc nitrate, cerium nitrate and sodium hydroxide as raw materials.The structure and properties of Ce-doped ZnO / bentonite composite photocatalyst were investigated by XRD, FT- The composites were characterized by SEM, TEM and N2 adsorption, and the photocatalytic activity of the composites under UV light irradiation was investigated by decoloration of methylene blue (MB) solution.The results showed that the composite light Due to the synergistic effect of the photocatalytic activity of Ce-doped ZnO and the adsorptivity of bentonite, the photocatalytic activity and stability of the catalytic material showed excellent photocatalytic activity and stability. When the doping amount of Ce was 3.0% and the amount of the composite photocatalytic material was When the pH value of 20 mg / L and MB solution is 6, the composite photocatalytic material has the best performance. The decolorization rate of MB solution reaches 98.6% after irradiated with UV lamp for 2 h.