酸对合成二氧化钛介孔材料的影响  

Effects of Acid on Synthesis of Mesoporous Titania

作　　者：何菁萍[1] 张昭[1] 沈俊[1] 张钰婷[1] 陈垚翰[1] 

机构地区：[1]四川大学化工学院,成都610065

出　　处：《无机材料学报》2009年第1期43-48,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金(50474071)

摘　　要：以硫酸和乙酸为酸度调节试剂,采用Sol-Gel过程和水热处理结合,在没有添加任何表面活性剂作模板剂的条件下,通过钛酸丁酯(TBOT)在酸性体系中的控制水解和自组装制备TiO2介孔材料.产物采用XRD、N2吸附-脱附等温线、TG-DSC进行分析表征.通过选择酸的种类和控制酸的浓度,添加配位抑制剂TEA减缓Ti的水解速率,可合成介孔纯TiO2材料.使用硫酸(H2SO4∶TBOT=1∶1,摩尔比)和TEA制备出比表面积为176m2/g,孔容为0.222 cm3/g,平均孔径约5nm,孔径分布窄,热稳定性较好的TiO2介孔材料.The mesoporous titania was prepared via Sol-Gel process from Ti （n-C4H9O）4 （TBOT） without surfactant templates. Using sulfuric acid or acetic acid as acidity regulator, the TBOT was hydrolyzed in an acidic system, and then its hydrolysate was treated by hydrothermal method. The products were characterized by XRD, N2 adsorption-desorption isotherm and TG-DSC. The results indicate that mesoporous TiO2 can be synthesized through selecting acid, controlling acid concentration and supplementing TEA which can reduce the hydrolysis rate of TBOT. The mesoporous TiO2, prepared with the mole ratio of H2SO4/TBOT/TEA = 1/ 1/1, shows a surface area of 176m^2/g, pore volume of 0.222cm^3/g, mean pore size of 5nm, and narrow pore size distribution, and its thermal stability is excellent.

关 键 词：介孔TIO2 钛酸丁酯 酸性水解 表征 

分 类 号：O614[理学—无机化学]