CoFe水滑石的合成及其催化活性研究  

Synthesis and catalytic activity of CoFe hydrotaldte

作　　者：陈慧琴[1] 詹正坤[2] 

机构地区：[1]韶关学院化学与环境工程学院,广东韶关512005 [2]华中师范大学化学学院,湖北武汉430079

出　　处：《韶关学院学报》2007年第12期55-57,共3页Journal of Shaoguan University

摘　　要：以Co(NO_3)_2·6(H_2O)和Fe(NO_3)_3·9(H_2O)为原料,选取NaOH和Na_2CO_3为沉淀剂,采用低过饱和共沉淀法合成了CoFe系列的碳酸根型水滑石,用XRD、IR和TG-DTA等分析手段对样品进行测试和表征.经焙烧后,发现其复合氧化物对乙醇催化脱水、脱氢反应有一定的活性.A series of CoFe hydrotalcite were synthesized by combining a mixed solution of Co （ NO3 ）2 · 6 （ H2O ） and Fe（NO3 ）3·9（H2O） with a second solution containing NaOH and Na2CO3. Their structures were characterized by XRD, IR and TG - DTA. The results showed that the hydrotalcites with Co/Fe molar ratios of 2 to 4 have the nice crystal form and high purity. After calcined, hydrotalcites are converted into composite oxides. It is found that the composite oxides has activity and selectivity for catalyzing the dehydrogenation and dehydration of ethanol.

关 键 词：水滑石 共沉淀合成 复合氧化物 催化活性 

分 类 号：O643.36[理学—物理化学]