(1. 玉林师范学院 新材料研发与化学生物传感技术所，玉林 537000；
2. 中南大学 化学化工学院，长沙 410083；
3. 贵州凯里学院 应用化学研究所，凯里 556000)
摘 要: 以钛酸四丁酯为钛源、十八水硫酸铝为铝源、三乙醇胺为模板剂, 采用研磨−溶胶技术合成了Al掺杂的TiO2介孔材料, 并利用XRD、EDS、TEM、BET、UV-vis和IR等手段表征了材料的结构、形貌、比表面积、孔径分布及光学性能。结果表明：Al掺杂能够减小TiO2光催化剂的粒径, 提高介孔TiO2的热稳定性；Al掺杂TiO2介孔材料的平均孔径为4.5 nm, 比表面积达到110.2 m2/g；相比商用P25和介孔TiO2，Al掺杂介孔TiO2的吸收边发生红移，对初始浓度为20 mg/L 的甲基橙进行催化降解1 h 后，其降解率达到92.5%。
关键字: TiO2；Al掺杂；介孔材料；光催化剂
Al-doped TiO2 mesoporous materials
（1. Institute of Advanced Materials and Chembiosensing Technology, Yulin Normal University, Yulin 537000, China;
2. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
3. Institute of Applied Chemistry, Kaili University, Kaili 556000, China）
Abstract:Using tetrabutyl orthotitanate (TBOT) as Ti source, Al2(SO4)2·18H2O as Al source and triethanolamine as a template, Al-doped TiO2 mesoporous materials were synthesized via grinding−sol-gel method. The structure, morphology, crystalline size, specific surface area, pore size and photocatalytic activity of the as-prepared samples were characterized by X-ray diffractometry, high-resolution transmission electron microscopy (HRTEM), N2 adsorption desorption and UV-vis spectrometer (UV-vis) techniques. The results show that Al-doped TiO2 has the wormhole-like mesoporous structure, and the Al doping can not only decrease the particle size of nanoparticles, but also improve the stability of the mesoporous TiO2. The specific surface areas and the average pore diameter of Al-doped TiO2 is about 110.2 m2/g and 4.5 nm, respectively. Compared with P25 and mesoporous TiO2, the gap adsorption edge of Al-doped TiO2 mesoporous materials exhibit a little red shift, the degradation ratio of which can be up to 92.5% during the photodegradation of methyl orange with the initial concentration of 20 mg/L for 1 h.
Key words: TiO2; Al-doping; mesoporous material; photocatalyst
