| Sol-Gel法制备Bi2O3·3MoO3复合氧化物催化剂及其表面酸碱性的微量吸附量热研究 |
| Preparation of Bi2O3·3MoO3 Oxide Catalyst by Sol Gel Method and its Microcalorimetric Studies of Surface Acidity and Basicity |
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| 摘要: |
| 关键词: Bi2O3·3MoO3复合氧化物催化剂 溶胶-凝胶法 微量吸附量热 |
| 基金项目: 国家自然科学基金(No.29973013);国家重点基础研究发展规划项目(G1999022408);南京大学现代分析中心测试基金 |
| Abstract: Bi2O3·3MoO3 oxide catalyst has been prepared by the sol gel pr℃ ess at lower temperature. The influences of preparation conditions and thermal treatment conditions on the morphology and structure of the catalyst have been studied by using TEM, DTA TG, FT IR, XRD and BET surface area measurement methods. It is shown that the BET surface area of Bi2O3·3MoO3 prepared by sol gel method is larger than that of Bi2O3·3MoO3 prepared by coprecipitation method. For the preparation of the well distribuated Bi2O3·3MoO3 catalyst has a BET surface area of 13.2m2·g1, the optimum conditions for the catalyst are : pH<1.0, pretreated with absolute alcohol and calcination temperature 400℃ .Microcalorimetric adsorption was used to determine quantitatively the number and strength of acid/base sites on the Bi2O3·3MoO3 catalyst sample. It was found that the Bi2O3·3MoO3 catalyst sample possesses some mild acid sites and little base sites corresponding to the adsorption heat of 120～100kJ·mol-1 and coverage of 108μ mol· g-1 with NH3 adsorption, and due to the adsorption for CO2 are nearly zero on this sample. |
| Keywords: Bi2O3·3MoO3 oxide catalyst sol-gel method microcalorimetric adsorption |
| 投稿时间：1999-10-30 修订日期：1999-12-08 |
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| 葛欣,舒庆宁,沈俭一.Sol-Gel法制备Bi2O3·3MoO3复合氧化物催化剂及其表面酸碱性的微量吸附量热研究[J].无机化学学报,2000,16(4):675-679. |
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