| 钼酸镧超细微粒催化剂的合成及表征 |
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| 引用本文： | 石晓波,黄宜祥,汪德先.钼酸镧超细微粒催化剂的合成及表征[J].江西师范大学学报(自然科学版),2001,25(1):75-78. |
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| 作者姓名： | 石晓波 黄宜祥 汪德先 |
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| 作者单位： | 江西师范大学化学与生物科学学院 |
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| 基金项目： | 江西省自然科学基金资助项目(9920007) |
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| 摘 要： | 以柠檬酸为络合剂，采用溶胶-凝胶法合成了La2(MoO4)3超细微粒催化剂，使用DTA-TG、IR、XRD以及BET比表面测试等表征手段，考察了制备条件与热处理条件对复合氧化物超细微粒形成、结构和表面积的影响。结果表明：本文法制备的La2(MoO4)3复合氧化物的比表面积远远大于共沉淀法制得的类似样品的比表面积，在氮气气氛中分解La2(MoO4)3凝胶中的柠檬酸，可有效地避免柠檬酸分解发生氧化燃烧而引起微粒烧结。
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| 关 键 词： | 复合氧化物 制备 溶胶－凝胶法 钼酸镧 超细微粒催化剂 柠檬酸 比表面积 表征 |
| 文章编号： | 1000-5862(2001)01-0075-04 |
| 修稿时间： | 2000年2月14日 |
Sol-gel Method Preparation and Characterization of La-Mo Complex Oxide Uitrafine Particle Catalyst |
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| SHI Xiao-bo,HUANG Yi-xiang,WANG De-xian.Sol-gel Method Preparation and Characterization of La-Mo Complex Oxide Uitrafine Particle Catalyst[J].Journal of Jiangxi Normal University (Natural Sciences Edition),2001,25(1):75-78. |
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| Authors: | SHI Xiao-bo HUANG Yi-xiang WANG De-xian |
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| Abstract: | La Mo complex oxide ultrafine particle catalyst has been prepared by the sol gel method with citric acid as the complexant. The influences of preparation conditions and thermal treatment conditions on the surface area and structure of the complex oxide particle has been studied by using DTA TG, IR, XRD and BET surface area measurement methods. The results show that the surface area of La 2(MoO 4) 3 particle prepared by the sol gel method is much larger than that of La 2(MoO 4) 3 prepared by the coprecipitation method. When the La Mo gel is calcined in air, citric acid reacts violently with O 2, it produces a flash heat and results in an aggregation of the La Mo particles. When the gel is calcined in N 2,citric acid is removed mildly and La 2(MoO 4) 3 ultrafine particles are formed. |
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| Keywords: | La Mo complex oxide preparation of ultrafine particles sol gel method |
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