中孔复合锆-铝氧化物微球的制备及其正相色谱性能研究  

Preparation of Mesopore Zirconia-Alumina Composite and Its Application to Normal HPLC Support

作　　者：万剑砥[1] 冯钰錡[1] 胡玉玲[1] 达世禄[1] 王忠华[1] 

机构地区：[1]武汉大学化学与分子科学学院,武汉430072

出　　处：《高等学校化学学报》2001年第10期1661-1663,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :2 9875 2 0 )资助

摘　　要：Zirconia alumina composite was prepared as rigid microspheres by means of a sol gel process. Scan electron micrograph, electron spectroscopy, nitrogen adsorption, and potentiometric titration were used to characterize the zirconia alumina composite before and after acid etching. After the acid etching, the specific surface area of the zirconia alumina composite is about five times larger than that before acid etching; the molar ratio of Zr/Al and the acidity also increases, while the pore size decreases. The normal phase chromatographic performance of the zirconia alumina composite before and after acid etching was studied by using dichloromethane/cyclohexane, chloroform/cyclohexane, ethanol/cyclohexane as mobile phases. After the acid etching the zirconia alumina composite exhibited a higher column efficiency and different separation selectivity as compared with that before the acid etching. Basic compounds have a greater retention on the composite after the acid etching.Zirconia alumina composite was prepared as rigid microspheres by means of a sol gel process. Scan electron micrograph, electron spectroscopy, nitrogen adsorption, and potentiometric titration were used to characterize the zirconia alumina composite before and after acid etching. After the acid etching, the specific surface area of the zirconia alumina composite is about five times larger than that before acid etching; the molar ratio of Zr/Al and the acidity also increases, while the pore size decreases. The normal phase chromatographic performance of the zirconia alumina composite before and after acid etching was studied by using dichloromethane/cyclohexane, chloroform/cyclohexane, ethanol/cyclohexane as mobile phases. After the acid etching the zirconia alumina composite exhibited a higher column efficiency and different separation selectivity as compared with that before the acid etching. Basic compounds have a greater retention on the composite after the acid etching.

关 键 词：Zr2-Al2O3复合氧化物 酸腐蚀 固定相 高效液相色谱法 锆 氧化铝 复合微球 制备 正相色谱 性能 溶胶-凝胶法 

分 类 号：O657.72[理学—分析化学]