| 具有不同层间距、比表面和孔径大小的氧化硅柱层状铌酸的制备 |
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| 引用本文： | 侯文华,汪学广,颜其洁,陈静. 具有不同层间距、比表面和孔径大小的氧化硅柱层状铌酸的制备[J]. 高等学校化学学报, 1999, 20(11): 1793-1794 |
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| 作者姓名： | 侯文华 汪学广 颜其洁 陈静 |
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| 作者单位： | 1. 南京大学化学化工学院, 南京 210093;2. 南京化工大学应用化学系, 南京 210009 |
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| 摘 要： | 层柱金属氧化物是近年来被开发的新型无机多孔材料［１～６］．水合铌酸是一类独特的固体酸催化剂，通常是非孔性的，且经较高温度热处理后比表面和酸性均很小，从而限制了其在催化领域中的应用［７］．我们［３］曾报道了氧化硅柱层状铌酸的制备，本文则通过进一步改变制备过程中所用氨基丙基三乙氧基硅烷（ＡＰＳ）溶液的浓度、反应温度和时间，获得了一系列具有不同层间距、比表面和孔径的氧化硅柱层状铌酸．１ 实验部分ＨＮｂ３Ｏ８·Ｈ２Ｏ的制备见文献［８］．将１ｇＨＮｂ３Ｏ８·Ｈ２Ｏ加入７０ｍＬ不同浓度的ＡＰＳ水溶液中，所得…
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| 关 键 词： | 层状铌酸 氧化硅 支撑 |
| 收稿时间： | 1999-04-06 |
Preparation of Thermostable Silica-pillared Layered Niobic Acids with Different Interlayer Distance, Surface Area and Pore Size |
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| HOU Wen-Hua,WANG Xue-guang,YAN Qi-jie,CHEN Jing. Preparation of Thermostable Silica-pillared Layered Niobic Acids with Different Interlayer Distance, Surface Area and Pore Size[J]. Chemical Research In Chinese Universities, 1999, 20(11): 1793-1794 |
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| Authors: | HOU Wen-Hua WANG Xue-guang YAN Qi-jie CHEN Jing |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China;2. Department of Applied Chemistry, Nanjing University of Chemical Technology, Nanjing 210009, China |
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| Abstract: | By varying the concentration of APS aqueous solution, reaction time and temperature, a series of silica pillared layered niobic acids with different interlayer distances, surface areas, pore sizes and thermostability were successfully prepared. It was shown that increasing the concentration of APS aqueous solution under a certain level(from 2.1% to 10%) led to the formation of silica pillared layered niobic acids with a gradually increased interlayer distance, surface area and silica pillar density, and therefore a gradually decreased pore size, but the same thermostability. On the other hand, reducing reaction time from 3 days to 1 day caused the decrease of the interlayer distance, surface area and thermostability, but the increase of pore size due to lower pillar density. Furthermore, the reaction at room temperature gave rise to the silica pillared layered niobic acid with a smaller interlayer distance and pore size, a slightly larger specific surface area and a lower thermostability. |
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| Keywords: | Layered niobic acid Silica Pillaring |
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