(1. 玉林師范學院 新材料研發(fā)與化學生物傳感技術所，玉林 537000；
2. 中南大學 化學化工學院，長沙 410083；
3. 貴州凱里學院 應用化學研究所，凱里 556000)
摘 要: 以鈦酸四丁酯為鈦源、十八水硫酸鋁為鋁源、三乙醇胺為模板劑, 采用研磨−溶膠技術合成了Al摻雜的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結(jié)構(gòu)、形貌、比表面積、孔徑分布及光學性能。結(jié)果表明：Al摻雜能夠減小TiO2光催化劑的粒徑, 提高介孔TiO2的熱穩(wěn)定性；Al摻雜TiO2介孔材料的平均孔徑為4.5 nm, 比表面積達到110.2 m2/g；相比商用P25和介孔TiO2，Al摻雜介孔TiO2的吸收邊發(fā)生紅移，對初始濃度為20 mg/L 的甲基橙進行催化降解1 h 后，其降解率達到92.5%。
關鍵字: TiO2；Al摻雜；介孔材料；光催化劑
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
