论文部分内容阅读
用超临界流体沉积法处理过的活性炭(AC)为载体,钛酸丁酯为前驱物,硝酸铈为掺杂剂,乙醇为溶剂,制备了外负载TiO2-Ce/Csurf复合材料。在紫外灯照射下,以亚甲基蓝溶液为标准模拟降解物,研究了复合体不同热处理温度、不同浓度、不同亚甲基蓝浓度、不同铈掺杂量以及不同反应温度对光催化性能的影响。结果表明:外负载催化剂的催化性能要高于纯TiO2和体负载催化剂。铈离子掺杂能抑制TiO2晶粒生长,阻碍了TiO2由锐钛矿型向金红石型的转变。当铈离子掺杂量为1.5%,热处理温度为600℃,亚甲基蓝溶液初始浓度为5.5 mg/L,样品浓度为1.5 g/L时,光催化性能最好。
TiO2-Ce / Csurf composites were prepared by using activated carbon (AC) as carrier, butyl titanate as precursor, cerous nitrate as dopant and ethanol as solvent. Under UV irradiation, methylene blue solution was used as a standard simulation degradation product to study the effect of different heat treatment temperature, different concentration, different methylene blue concentration, different cerium doping amount and different reaction temperature on photocatalytic performance. The results show that the catalytic performance of the external supported catalyst is higher than that of the pure TiO2 and the bulk supported catalyst. Cerium ion doping can inhibit the growth of TiO2 grains, hindered the transformation of TiO2 from anatase to rutile. The best photocatalytic activity was obtained when the doping amount of cerium ions was 1.5%, the heat treatment temperature was 600 ℃, the initial concentration of methylene blue solution was 5.5 mg / L and the sample concentration was 1.5 g / L.