Preparation of alumina supported on carbon nanotubes and its application in fluoride adsorption from an aqueous solution |
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| Authors: | Email author" target="_blank">Wang?Shuguang?Email author Li?Yanhui Zhao?Dan Xu?Cailu Luan?Zhaokun Liang?Ji Wu?Dehai |
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| Institution: | (1) State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 100085 Beijing, China;(2) Department of Mechanical Engineering, State Key Laboratory of Automotive Safety and Energy, Tsinghua University, 100084 Beijing, China;(3) Department of Chemistry, Northeast University, 110004 Shenyang, China |
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| Abstract: | A novel material, alumina supported on carbon nanotubes (Al2O3/CNT), was prepared from carbon nanotubes and Al(NO3)3. X-ray diffraction (XRD) spectra demonstrate that alumina is amorphous, and scanning electron microscope (SEM) images show that CNT and alumina are homogeneously mixed. Furthermore, the fluoride adsorption behavior on the surface of Ai2O3/CNT has been investigated and compared with other adsorbents. The results indicate that Al2O3/CNT has a high adsorption capacity, with a saturation adsorption capacity of 39.4 mg/g. It is also found that the adsorption capacity of AI2O3/CNT is 3.0-4.5 times that of γ-Al2O3 while almost equal to that of IRA-410polymeric resin at 25 ℃. The adsorption isotherms of fluoride on Al2O3/CNT fit the Freundlich equation well, and optimal pH ranging from 5.0 to 9.0.`` |
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| Keywords: | carbon nanotube alumina fluoride removal compositematerial |
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