| 含Nb介孔Al2O3分子筛的合成及其性质研究 |
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| 引用本文： | 何杰,邢雅丽.含Nb介孔Al2O3分子筛的合成及其性质研究[J].安徽理工大学学报(自然科学版),2007,27(2):41-44. |
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| 作者姓名： | 何杰 邢雅丽 |
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| 作者单位： | 1. 安徽理工大学化学工程系,安徽,淮南,232001
2. 安徽理工大学化学工程系,安徽,淮南,232001;成都纺织高等专科学校染化系,四川,成都,611731 |
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| 基金项目： | 安徽省教育厅自然科学基金 |
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| 摘 要： | 将过渡金属元素Nb嵌入介孔Al2O3中以期改变Al2O3表面酸性。以三嵌段共聚物P123为模板剂,无水AlCl3和草酸铌为前驱物,在乙醇溶剂中采用溶胶-凝胶法合成含Nb介孔Al2O3分子筛,并用X-射线粉末衍射(XRD)、傅里叶变换红外光谱(FT-IR)、低温氮气吸附-脱附等方法对其结构进行表征,采用Hammett指示剂法对其表面酸量、酸强度分布进行表征。结果表明,Nb嵌入介孔Al2O3骨架中,形成Nb-O-Al键,改变了介孔Al2O3分子筛孔径,使表面出现了较强的酸中心,提高了表面酸强度和总酸量。
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| 关 键 词： | 含Nb氧化铝 介孔分子筛 表面酸性 |
| 文章编号： | 1672-1098（2007）02-0041-04 |
| 修稿时间： | 2006-11-28 |
Study on Synthesis and Feature of Nb-Containning Alumina Mesoporous Molecular Sieves |
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| HE Jie,XING Ya-li.Study on Synthesis and Feature of Nb-Containning Alumina Mesoporous Molecular Sieves[J].Journal of Anhui University of Science and Technology:Natural Science,2007,27(2):41-44. |
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| Authors: | HE Jie XING Ya-li |
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| Institution: | 1. Dept. of Chemical Engineering, Anhui University of Science and Technology, Huainan Anhui 232001. China;2. Chengdu Textile College,Chengdu Sichuan 611731, China |
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| Abstract: | The Surface acidity of mesoporous Alumina incorporating transition metal element Nb was investigated.Mesoporous Nb-containing alumina molecular sieves were prepared via Sol-Gel process and by using amphiphilic triblock copolymer P123 as a template,and anhydrous AlCl3 and niobium oxalate as precursors in ethanol.The samples were characterized by X-ray powder diffraction(XRD),Fourier transform infrared(FTIR),and nitrogen adsorption-desorption method.The surface acidity was determined by Hammett indicator method.The results showed that the Nb-O-Al bond has been formed in Nb-containing alumina molecular sieves,and the pore size of mesoporous Al2O3 was changed with incorporating Nb.The acid intensity and the total amount of acidic sites on the surface of mesoporous Nb-containing alumina molecular sieve were increased compared with Al2O3. |
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| Keywords: | Nb-containing alumina mesoporous molecular sieves surface acidity |
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