| 铬铝基柱撑蒙脱石的制备与孔道结构 |
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| 引用本文： | 刘晓文,钟钢,刘庄,毛小西.铬铝基柱撑蒙脱石的制备与孔道结构[J].中南大学学报(自然科学版),2010,41(3). |
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| 作者姓名： | 刘晓文 钟钢 刘庄 毛小西 |
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| 作者单位： | 中南大学,资源加工与生物工程学院,湖南,长沙,410083 |
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| 基金项目： | 国家重点基础研究发展规划项目 |
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| 摘 要： | 以钠基蒙脱石为原料,采用取代法合成铬铝柱化剂,并用湿法工艺制备铬铝基柱撑蒙脱石,研究不同Cr与Al物质的量比和pH对柱撑蒙脱石制备的影响。研究结果表明:当Cr离子与Al离子物质的量比为2:1、加入100mL浓度为0.4mol/L NaOH时,可得到(001)层间距达2.0535nm的铬铝基柱撑蒙脱石,铬铝二元聚合羟基阳离子与钠基蒙脱石之间发生离子交换反应,进入膨胀的蒙脱石层间;铬铝柱撑蒙脱石的基本结构在离子交换过程中并没有发生改变,且发现铬氧八面体,但未发现铬氧四面体,铬离子倾向于以铬氧八面体的形式进入铬铝基柱撑蒙脱石层间;铬铝基柱撑蒙脱石的比表面积为170.4m2/g,孔容为0.1841cm3/g,介孔平均孔径为3.840nm,说明铬铝基柱撑蒙脱石比钠基柱撑蒙脱石、铝基柱撑蒙脱石和铬基柱撑蒙脱石具有较大的比表面积、较大的微孔和较小的介孔,铬铝柱撑蒙脱石是一种有用的催化和吸附材料。
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| 关 键 词： | 钠基蒙脱石 铬铝基蒙脱石 柱撑 |
Preparation and channel structure of Al-Cr-pillared montmorillonite |
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| LIU Xiao-wen,ZHONG Gang,LIU Zhuang,MAO Xiao-xi.Preparation and channel structure of Al-Cr-pillared montmorillonite[J].Journal of Central South University:Science and Technology,2010,41(3). |
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| Authors: | LIU Xiao-wen ZHONG Gang LIU Zhuang MAO Xiao-xi |
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| Institution: | LIU Xiao-wen,ZHONG Gang,LIU Zhuang,MAO Xiao-xi (School of Resources Processing and Bioengineering,Central South University,Changsha 410083,China) |
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| Abstract: | Na-montmorillonite was used as starting material to obtain Al-Cr-montmorillonite. Al-Cr-pillared agent was synthesized by ion-exchange method and Al-Cr-montmorillonite was prepared with wet technology. The effects of molar ratio of Cr ion to Al ion and pH value on Al-Cr-montmorillonite were investigated. The results show that the (001) basal spacing of Al-Cr-montmorillonite reaches 2.053 5 nm when Al-Cr-montmorillonite is synthesized under the condition of 2:1 molar ratio of Cr ion to Al ion and 100 mL 0.4 ... |
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| Keywords: | Na-montmorillonite Al-Cr-montmorillonie pillaring |
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