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化学学报
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化学学报 ›› 2003, Vol. 61 ›› Issue (1): 100-103. 上一篇    下一篇

研究论文

溶胶－凝胶法制备高比表面积的纳米氧化铝及其对过渡金属离子吸附行为的研究

常钢;江祖成;彭天右;胡斌   

  1. 武汉大学化学与分子科学学院,武汉(430072)
  • 发布日期:2003-01-15

Preparation of High-Specific-Surface-Area Nanometer-sized Alumina by Sol-Gel Method and Study on Adsorption Behaviors of Transition Metal Ions on the Alumina Powder with ICP-AES

Chang Gang;Jiang ZuCheng;Peng TianYou;Hu Bin   

  1. College of Chemistry and Molecular Science, Wuhan University,Wuhan (430072);Collegeof Chemistry and Molecular Science, Wuhan University, Wuhan(430072)
  • Published:2003-01-15

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被引次数

21

溶胶－凝胶法合成高比表面积纳米氧化铝，以透射电镜（TEM），X射线衍射（ XRD），比表面积测定（BET）等手段对所得的纳米氧化铝进行了表征，表明纳米粒 子的粒径在40－80nm。以ICP－AES为检测手段，考察了纳米氧化铝材料在静态吸附 条件下对于过渡金属离子的富集分离性能。结果表明，在pH8-9范围内，过渡金属 离子Cu,Mn,Cr,Ni可实现定量分离富集。吸附于纳米氧化铝上的金属离子可用1. 0mol/L盐酸溶液完全解脱。将所合成的纳米氧化铝用于实际标准样品黑麦叶和煤烟 灰中Cu,Mn,Cr,Ni的分离富集及ICP－AES测定，结果满意。

关键词: 过渡金属化合物, 离子, 吸附, 溶胶-凝胶法, 纳米相材料, 氧化铝, 电感耦合等离子体光谱, 原子发射光谱, 分离, 富集

High surface area nanometer-sized alumina were successfully prepared by Sol-Gel method. The product was characterized by TEM, XRD and BET. The adsorption of transition metal cations on the high surface-area alumina powder was investigated. The effect of pH on the adsorption of analytes, adsorption isotherm and adsorption capacities were studied and it was found that the nanometer-sized Al_2O_3 possesses a significant capacity towards sorption of transition metal cations. At pH 8~9 quantitative sorption was obtained for Cu, Mn, Cr and Ni. All tested elements can be eluted with 1.0 mol/L HCI. The method has been applied to the analysis of some environmental samples with satisfactory results.

Key words: TRANSITION METAL COMPOUND, IONS, ADSORPTION, SOL-GEL PROCESS, NANOPHASE MATERIALS, ALUMINIUM OXIDE, ICP-ATOMIC EMISSION SPECTROMETRY, ATOMIC EMISSION SPECTROMETRY, ISOLATION, CONCENTRATION

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