(1. 黑龙江大学 化学化工与材料学院 功能无机材料教育部重点实验室，哈尔滨 150080； 2. 湘潭大学 环境与资源学院 环境科学与工程系，湘潭 411100)
摘 要: 以钛酸四丁酯为钛源、氢氟酸为氟源、硝酸铜为铜源，乙醇为溶剂，采用蒸汽热法制备氟铜共掺杂的TiO2空心微球，采用SEM、XRD、UV-Vis、BET等对氟铜共掺杂的TiO2空心微球的形貌特征、晶相结构、吸光性能及氟、铜的存在形式进行表征，以阳离子蓝的光催化降解为目标反应，评价其光催化活性。结果表明：氟铜共掺杂的TiO2空心微球主要通过水蒸气产生的气泡为模板获得，氟铜共掺杂增大TiO2的比表面积，其中TiO2以锐钛矿存在，Cu2+进入TiO2晶格中，大部分F以化学吸附态存在于TiO2的表面形成≡Ti—F基团，少量F进入晶格内部。相比纯TiO2空心微球，氟铜共掺杂的TiO2空心微球的光催化活性明显提高，用氙灯模拟可见光，对初始浓度为20 mg/L的阳离子蓝溶液进行光催化降解，30 min后其降解率达到99.8%。
关键字: 二氧化钛；共掺杂；空心微球；光催化；阳离子蓝溶液
（1. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China; 2. Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan 411100, China）
Abstract:F and Cu co-doping TiO2 hollow microspheres were synthesized via steam heat method, using tetrabutyl orthotitanate as Ti source, hydrofluoric acid as F source, cupric nitrate as Cu source and ethanol as solvent. The structure and properties of the resulting samples were characterized by SEM, XRD, UV-Vis, BET and so on. Photocatalytic degradation of cationic blue was used as a probe reaction to evaluate their photocatalytic activity. The results indicate that the F and Cu co-doping TiO2 hollow microspheres are anatase phase structure, Cu2+ enters into the TiO2 lattice, the fluorine atoms mainly distributed on the surface of TiO2, and exist in forms of chemical-adsorption, the F and Cu co-doping TiO2 hollow microspheres are achieved by the template of water vapor bubbles. The F and Cu co-doping TiO2 hollow microspheres increase the specific surface area of TiO2. Compared to pure TiO2 hollow microspheres, the F and Cu co-doping TiO2 hollow microspheres show much higher degradation efficiency under xenon lamp irradiation, and the degradation rate of which can be up to 99.8% during the photodegradation of cationic blue with the initial concentration of 20 mg/L for 30 min.
Key words: titanium dioxide; co-doping; hollow microspheres; photocatalysis; cationic blue
