以硅藻土为载体,四氯化钛为前驱体,采用水解沉淀法制备了纳米TiO2/硅藻土复合材料.结合XRD、SEM、氮气吸脱附等表征手段,探究了复合材料对罗丹明B的光催化性能,对影响复合材料光催化性能的因素进行了研究.结果表明:锐钛矿型纳米TiO2以团聚体和分散状负载于硅藻土表面.催化剂用量、染料溶液pH、无机离子、光照强度等因素都会在不同程度上影响TiO2/硅藻土复合材料的光催化性能.在染料初始浓度为10 mg/L,催化剂用量1.0 g/L,紫外光强度为300 W,光照60 min的条件下,罗丹明B光催化降解率达到99.8％.
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