水热合成法制备纳米TiO_2催化剂及其催化性能的研究

Research of Hydrothermal Synthesis Method Preparing Nanometer TiO_2 Catalyst and Catalytic Performance

采用水热合成法制备纳米TiO2催化剂,并通过XRD、TEM、SEM、BET、UV-Vis漫反射光谱研究了TiO2的本征性质,以Cr(VI)为目标污染物,考察纳米TiO2的光催化活性,并研究了煅烧温度,溶液pH对纳米TiO2催化剂光催化性能的影响。制备的纳米TiO2材料作为光催化剂光催化还原Cr(VI)离子,结果表明,TiO2-550还原Cr(VI)离子的光催化活件最好,随着pH降低,TiO2-550还原速率显著提高。

Nanometer TiO2 catalyst was prepared with the hydrotherma｜ synthesis method. Through XRD, TEM, SEM, BET, and UV -Vis diffuse reflection spectroscopy, the TiO2 intrinsic property was studied. Cr（VI） as the target pollutants, nanometer TiO2 photocatalytic activity, the calcining temperature, and solution pH on nanometer TiO2 catalyst light catalytic performance were investigated. The nanometer TiO2 material as light catalyst photocatalytic reduction of Cr（VI） ion, the results showed that TiO2 -550 reducing Cr（VI） ion light catalytic was the best, with the pH reduced, TiO2 -550 reduction rate increased significantly.