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铈—钼复合氧化物超微粒子的合成
引用本文:石晓波,李春根,汪德先.铈—钼复合氧化物超微粒子的合成[J].江西师范大学学报(自然科学版),2001,25(4):283-286.
作者姓名:石晓波  李春根  汪德先
作者单位:江西师范大学,化学与生物科学学院,
基金项目:江西省自然科学基金(99007)资助项目.
摘    要:以硝酸铈和钼酸铵为原料,采用溶胶-凝胶法和微波加热技术制备了Ce2(MoO4)3超微粒子催化剂,使用DTA-TG、IR、XRD以及BET比表面测试等表征手段,考察了制备条件对复合氧化物超微粒子形成、晶相和比表面积的影响,结果表明:制备Ce2(MoO4)3超微粒子的适宜条件为:初始溶液pH=1.0,柠檬酸/(铁 钼)摩尔比等于0.4,在此条件下制得的干凝胶,经微波加热处理后,粒子的比表面积为35.8m^2/g,粒径约为40nm。

关 键 词:铈-钼复合氧化物  超微粒子  制备  溶胶-凝胶法  微波辐射  催化剂  比表面积
文章编号:1000-5862(2001)04-0283-04
修稿时间:2001年6月24日

Preparation of Ce-Mo Complex Oxide Uitrafine Particle by Sol-Gel Method and Microwave Irradiation
SHI Xiao-bo,LI Chun-gen,WANG De-xian.Preparation of Ce-Mo Complex Oxide Uitrafine Particle by Sol-Gel Method and Microwave Irradiation[J].Journal of Jiangxi Normal University (Natural Sciences Edition),2001,25(4):283-286.
Authors:SHI Xiao-bo  LI Chun-gen  WANG De-xian
Abstract:Ce-Mo complex oxide ultrafine particle catalyst was prepared from gel precursor on heating in microwave oven. The precursor was obtained from Ce(NO 3) 3 and (NH 4) 6Mo 7O 24 in citric acid .The influences of preparation conditions on the crystal phase and dimension of the particles were studied by using XRD, DTA-TG, IR and BET surface area measurement methods. The results show that appropriate condition is citric acid/(Ce+Mo) molar ratio =0.4 and pH=1.0 for preparing Ce 2(MoO 4) 3 ultrafine particle. The BET surface area of the sample treated in microwave oven is 35.8 m 2/g, the size is about 40 nm.
Keywords:Ce-Mo complex oxide  preparation of ultrafine particles  Sol-Gel method  microwave irradiation
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