| 源自水稻壳的高比表面纳米二氧化硅负载12-磷钨酸:一种高效纳米催化剂用于几种有机反应(英文) |
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| 作者姓名： | Ezzat RAFIEE Shabnam SHAHEBRAHIMI |
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| 作者单位： | Faculty of Chemistry,Razi University,Kermanshah 67149,Iran;Kermanshah Oil Refining Company,Kermanshah,Iran |
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| 基金项目： | supported by the Razi University Research Council and Kermanshah Oil Refining Company |
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| 摘 要： | Nano silica was prepared from rice husk with high surface area.X-ray diffraction(XRD) pattern showed that the amorphous form of silica was produced.Chemical composition of the nano silica was estimated by X-ray fluorescence spectroscopy and CHN analysis.The nano silica was used as a support for H3PW12O40.The nano silica and nano silica supported H3PW12O40 were characterized by inductively coupled plasma,XRD,transmission electron microscopy(TEM),N2 adsorption-desorption,and Fourier transform infrared spectroscopy.TEM images of nano silica as well as the supported catalyst displayed average size of 6 and 7 nm,respectively.The catalyst showed excellent activity in some important organic reactions including Biginelli,Hantzsch,Mannich,and Claisen-Schmidt reactions with good reusability.Catalytic activity of this nano catalyst is an improvement over the commercially available silica that is used to support H3PW12O40.
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| 关 键 词： | amorphous silica heteropolyacid heterogeneous catalysis nano catalyst rice husk |
Nano Silica with High Surface Area from Rice Husk as a Support for 12-Tungstophosphoric Acid: An Efficient Nano Catalyst in Some Organic Reactions |
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| Ezzat RAFIEE,Shabnam SHAHEBRAHIMI.Nano Silica with High Surface Area from Rice Husk as a Support for 12-Tungstophosphoric Acid: An Efficient Nano Catalyst in Some Organic Reactions[J].Chinese Journal of Catalysis,2012,33(8):1326-1333. |
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| Authors: | Ezzat RAFIEE Shabnam SHAHEBRAHIMI |
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| Institution: | Ezzat RAFIEE1,2,*,Shabnam SHAHEBRAHIMI1 1Faculty of Chemistry,Razi University,Kermanshah 67149,Iran 2Kermanshah Oil Refining Company,Kermanshah,Iran |
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| Abstract: | Nano silica was prepared from rice husk with high surface area.X-ray diffraction(XRD) pattern showed that the amorphous form of silica was produced.Chemical composition of the nano silica was estimated by X-ray fluorescence spectroscopy and CHN analysis.The nano silica was used as a support for H3PW12O40.The nano silica and nano silica supported H3PW12O40 were characterized by inductively coupled plasma,XRD,transmission electron microscopy(TEM),N2 adsorption-desorption,and Fourier transform infrared spectroscopy.TEM images of nano silica as well as the supported catalyst displayed average size of 6 and 7 nm,respectively.The catalyst showed excellent activity in some important organic reactions including Biginelli,Hantzsch,Mannich,and Claisen-Schmidt reactions with good reusability.Catalytic activity of this nano catalyst is an improvement over the commercially available silica that is used to support H3PW12O40. |
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| Keywords: | amorphous silica heteropolyacid heterogeneous catalysis nano catalyst rice husk |
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