TiO_2中空微球的制备及其对罗丹明B的光催化降解

采用一步水热法,以TiCl_4,H_2O_2,KBF4为原料,制备了TiO_2中空微球。采用SEM和XRD技术对TiO_2中空微球的形貌和结构进行了表征。以罗丹明B为模拟降解物,研究了TiO_2中空微球的光催化降解活性;并对TiO_2中空微球的生长机制进行了探讨。表征结果显示,制得的TiO_2中空微球呈锐钛矿型,颗粒分散均匀,外径约为3μm。实验结果表明,在紫外光照射下,加入1 g/L的TiO_2中空微球,处理初始质量浓度为20 mg/L、溶液p H为7的罗丹明B溶液,降解时间为120 min时,罗丹明B降解率可达93.38%。

Preparation of TiO2 Hollow Microspheres and Photocatalytic Degradation of Rhodamine B

TiO₂ hollow microspheres were prepared by a new hydrothermal method using TiCl₄,H₂O₂,KBF₄ as raw materials. The morphology and structure of TiO₂ hollow microspheres were characterized by SEM and XRD. The photocatalytic activity of TiO₂ hollow microspheres to rhodamine B was studied,and the growth mechanism of TiO₂ hollow microspheres was investigated. The characterization results show that the prepared TiO₂ hollow microspheres are anatase type particles with 3 μm of diameter,and they are dispersed evenly. The experimental results indicate that when the rhodamine B solution with 20 mg/L of initial mass concentration and 7 of pH is treated under UV light using 1 g/L TiO₂ hollow microspheres for 120 min,the degradation rate of rhodamine B can reach 93.38%.