α—Fe2O3纳米晶制备及对KClO3热分解的催化作用.pdfVIP

第27卷 第4期 安徽理工大学学报(自然科学版) Vo1．27 NO．4 2007年12月 Journal of Anhui University of Science and Technology(Natural Science) Dec．2007 一 Fe2O3纳米晶制备及对KCIO3热分解的催化作用 谢慕华 (安徽理工大学化学工程学院，安徽 淮南 232001) 摘 要：用强迫水解法制备纳米Fe。O。。用透射电子显微镜研究了陈化方式对纳米FezO3的形 貌和大小的影响，用X射线衍射分析法对纳米Fe。O。的晶相进行了表征，通过热重分析法考察 了纳米Fe。O。对KCIO3热分解的催化效果。结果表明，加热陈化和室温陈化制得的纳米FezO3 粒子均呈纺锤形，加热陈化比室温陈化制得的纳米Fe。O。粒子小，表面更光滑，两种陈化方 式制得的纳米Fe。O。均是三方晶系 属于a—Fe203；纳米Fe2O3对KClO3热分解的催化效果优 于普通Fe2O3。 关键词：纳米Fe 0。；陈化方式；热分解；催化作用 中图分类号：TQ622．15 文献标识码：A 文章编号：1672—1098(2007)04，0057—03 Synthesis and Effect of Nanometer——sized Ferric Oxide on Catalyzing Decomposition of Potassium Chlorate XIE MU—hua (School of Chemical Engineering，Anhui University of Science and Technology，Huainan Anhui 232001，China) Abstract：Using forced hydrolysis method to prepare nanometer～sized ferric oxide is presented．Influence of different aging ways on the pattern and size of nanometer-sized ferric oxide was researched with trans- mission electron microscope．Crystal’S phase of nanometer—sized ferric oxide was characterized by using X--diffraction technique；and catalysis effect of nanometer-sized ferric oxide for thermal decomposition of potassium chlorate was researched with thermogravimetric analysis method．The results show that nanometer—sized ferric oxide particles prepared with heat aging method and room-temperature aging method，present fusiform．Nanometer-sized ferric oxide particles prepared with heat aging method are smaller and smoother than with room-temperature aging method．Nanometer—sized ferric oxide particles prepared with both methods present oblique parallelepiped crystal system．which belongs to a— ferric oxide．Ferric oxide has catalysis for thermal decomposition of potassium chlorate，and its