| Cuo(CoO,MnO)/SiO_2纳米复合气凝胶催化剂载体的溶胶-凝胶法制备与表征 |
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| 引用本文： | 赵越卿,赵海雷,贾千一,梁英华,沈毅,张翠娟. Cuo(CoO,MnO)/SiO_2纳米复合气凝胶催化剂载体的溶胶-凝胶法制备与表征[J]. 功能材料, 2009, 40(2) |
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| 作者姓名： | 赵越卿 赵海雷 贾千一 梁英华 沈毅 张翠娟 |
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| 作者单位： | 北京科技大学,无机非金属材料系,北京,100083;河北理工大学,轻工学院,河北,唐山,063000;北京科技大学,无机非金属材料系,北京,100083;河北理工大学,材料学院,河北,唐山,063009;河北理工大学,化工学院,河北,唐山,063009 |
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| 基金项目： | 国家自然科学基金，河北省唐山市科技发展计划 |
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| 摘 要： | 以正硅酸乙酯(tetraethyl orthosilicate,TEOS)、乙酸铜、乙酸钴、乙酸锰为原料,采用溶胶-凝胶法、常压干燥制备了CuO(CoO,MnO)/SiO2纳米复合气凝胶.分析了过渡金属氧化物MO与Sio2的质量比、温度和pH值对凝胶形成的影响.采用场致发射扫描电镜(FE-SEM)、BET、傅里叶变换红外分析(FTIR)、热重-差热分析(TG-DTA)、电子散射能谱分析(EDS)和化学分析等对CuO(CoO,MnO)/SiO2纳米复合气凝胶的微观结构和组成进行了研究.结果表明,纳米复合气凝胶的颗粒约在20～100nm,比表面积为344～733m2/g,孔径范围为2～22nm,而且过渡金属Cu、Co和Mn能够与氧形成部分一O-M-O-桥键连接,并与Si通过化学键形成三维网络结构;纳米复合气凝胶试样中的多元过渡金属氧化物含量可控制在3%～75%(质量分数).这种结构和组成既有利于提高催化剂负载量,又可充分发挥过渡金属氧化物的助催化作用.
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| 关 键 词： | 溶胶-凝胶法 常压干燥 纳米复合气凝胶 催化剂载体 表征 |
Preparation and characterization of CuO(CoO,MnO)/SiO_2 nanocomposite aerogels as catalysts carrier by sol-gel process |
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| ZHAO Yue-qing,,ZHAO Hai-lei,JIA Qian-yi,LIANG Ying-hua,SHEN Yi,ZHANG Cui-juan. Preparation and characterization of CuO(CoO,MnO)/SiO_2 nanocomposite aerogels as catalysts carrier by sol-gel process[J]. Journal of Functional Materials, 2009, 40(2) |
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| Authors: | ZHAO Yue-qing ZHAO Hai-lei JIA Qian-yi LIANG Ying-hua SHEN Yi ZHANG Cui-juan |
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| Affiliation: | 1.Department of Inorganic Nonmetallic Materials;University of Science and Technology Beijing;Beijing 100083;China;2.College of Light Industry;Hebei Polytechnic University;Tangshan 063000;3.College of Materials Science and Engineering;Tangshan 063009;4.College of Chemical Engineering;China |
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| Abstract: | CuO(CoO,MnO)/SiO2 nanocomposite aerogels were prepared from tetraethyl orthosilicate(TEOS) and acetate of Cu,Co and Mn via sol-gel process and ambient pressure drying technique.The effect of mass ratio of transition metal-oxides to SiO2,preparation temperature and pH value on gelation was investigated.The microstructure and composition of CuO(CoO,MnO)/SiO2 nanocomposite aerogels were analyzed by field emission scanning electron microscope,BET,Fourier transform infrared spectrum,thermogravimetric and differe... |
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| Keywords: | sol-gel process ambient pressure drying technique nanocomposite aerogel catalysts carrier characterization |
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