纳米级SO_4^(2-)/TiO_2固体超强酸的红外光谱及催化活性  

Study of IR Spectra and Catalytic Activity of Nanograde SO^(2-)_4/TiO_2 Solid Super Acid

作　　者：张萍[1] 李平[1] 贾振斌[1] 宋秀芹[1] 魏雨[1] 

机构地区：[1]河北师范大学化学学院

出　　处：《精细化工》2003年第3期160-162,186,共4页Fine Chemicals

基　　金：河北省自然科学基金资助项目(502154)

摘　　要：用不同晶型的纳米TiO2制备出纳米级SO2-4/TiO2固体超强酸,利用红外光谱研究了TiO2晶型、硫酸浓度及焙烧温度对SO2-4/TiO2固体超强酸的影响。制备SO2-4/TiO2的最优条件是:锐钛型TiO2,c(H2SO4)=1 0mol/L的硫酸浸泡,450℃焙烧。此时其红外光谱的特征吸收峰最强,催化乙酸和丁醇酯化反应可使酯化率达到98 4%。The nanograde SO2-4/TiO2 solid super acid was prepared by nanotitania of different crystal type.Influences of TiO2 crystal type,sulphuric acid concentration and calcining temperature on acid strength and catalytic activity of SO2-4/TiO2 were investigated by IR spectroscopy.Thus,soaking anatase nanotitania powder in 10 mol/L H2SO4 and baking at 450 ℃,the nanograde SO2-4/TiO2 solid super acid preparaed had the strongest absorption peaks on IR spectrum and catalyzed the esterification reaction of acetic acid and nbutanol to give 98.4% yield.

关 键 词：纳米级SO4^2-/TIO2 固体超强酸 红外光谱 催化活性 催化剂 

分 类 号：O643.36[理学—物理化学] O657.33[理学—化学]