纳米TiO2-石墨烯光催化剂的水热合成及其光催化性能

以钛酸四正丁酯和石墨为原料，通过水热法制备了锐钛矿型为主的纳米TiO2复合光催化剂（纳米TiO2-石墨烯），并采用XRD，FTIR，FESEM，TEM技术对其进行了表征。通过紫外光照射降解溶液中的罗丹明B（RhB）研究了TiO2-石墨烯的光催化活性，分析了初始罗丹明B质量浓度、催化剂加入量、溶液pH和催化剂使用次数等影响降解效果的因素。实验结果表明：在初始RhB质量浓度为20 mg/L、溶液pH为7.10、催化剂加入量为1.000 g/L的条件下，紫外光照射30 min时，纳米TiO2-石墨烯对RhB的降解率高达98.69%，明显高于纳米TiO2的44.69%;纳米TiO2-石墨烯稳定性较强，可多次重复使用。

Hydrothermal Synthesis of Nano TiO2-Graphene Photocatalyst and Its Photocatalytic Activity

Nano TiO2-graphene photocatalyst was prepared by hydrothermal method using tetrabutyl titanate and graphite as raw materials，and characterized by XRD，FT-IR，FESEM and TEM. The photocatalytic activity of nano TiO2-graphene was studied by degradation of rhodamine B(RhB) in solution under UV light，and the affecting factors were investigated. The experimental results indicate that：Under the conditions of initial RhB mass concentration 20 mg/L，solution pH 7.10，photocatalyst dosage 1.000 g/L and irradiation time 30 min，the RhB degradation rate on nano TiO2-graphene is up to 98.69%，which is much higher than that on nano TiO2 (44.69%);Nano TiO2-graphene is stable and can be used repeatedly.