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以四水硫酸铈和硫酸钛为原料,十二烷基硫酸钠为表面活性剂,通过直接投料微波合成法制备了掺铈纳米二氧化钛,并用XRD、SEM对其进行了表征。结果表明,直接投料掺杂铈量为硫酸钛物质的量的0.8%时的TiO2纳米复合物,500℃恒温热处理下晶型为锐钛矿型,形貌为许多粒子组成的多孔类球状结构。以催化降解甲基橙为模型来考察其可见光光催化活性。讨论了光催化剂投加量、溶液pH值、H2O2的加入量以及铈掺杂的用量等因素对光催化性能的影响。当催化剂用量为1.2 g/L,溶液pH为2,H2O2的体积分数为0.003时,可见光催化效果最好,2 mg/L的甲基橙溶液在降解50 min后,降解率达到94.0%。
The nanosized titanium dioxide doped with cerium sulfate and titanium sulfate as raw materials and sodium lauryl sulfate as surfactant were prepared by direct synthesis microwave irradiation and characterized by XRD and SEM. The results show that the TiO 2 nanocomposite doped with 0.8% cerium titanate has a porous anatase structure with many morphologies of anatase under the 500 ℃ constant temperature heat treatment. Catalytic degradation of methyl orange as a model to examine its visible light photocatalytic activity. The effects of dosage of photocatalyst, solution pH value, addition amount of H2O2 and dosage of cerium on photocatalytic performance were discussed. When the amount of catalyst is 1.2 g / L, the pH of the solution is 2 and the volume fraction of H2O2 is 0.003, the photocatalytic activity is the best. The degradation rate of methyl orange solution of 2 mg / L reaches 94.0% after 50 min of degradation.