Studies on the Preparation of Alumina Supported on Carbon Nanotubes and Defluorination from Absorbed Water

Chem. J. Chinese Universities ›› 2003, Vol. 24 ›› Issue (1): 95.

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Studies on the Preparation of Alumina Supported on Carbon Nanotubes and Defluorination from Absorbed Water

WANG Shu-Guang¹, LI Yan-Hui², ZHAO Dan^1,3, ZHAO Hua-Zhang¹, XU Cai-Lu², LUAN Zhao-Kun¹, LIANG Ji², WU De-Hai²

1. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;
2. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
3. Department of Chemistry of Science College, Northeast University, Shenyang 110004, China

Received:2001-11-12 Online:2003-01-24 Published:2003-01-24

Abstract

Abstract: A novel material for fluoride removal, alumina supported on carbon nanotubes (Al₂O₃/CNT), was prepared from carbon nanotubes and aluminium nitrate. X-ray diffraction(XRD) spectra demonstrate that alumina was amorphous at calcination temperature lower than 850 ℃ while it was α-Al₂O₃ at 1 050 ℃. Scanning electron microscope(SEM) images showed that the CNT and alumina were homogenously mixed. Furthermore, the fluoride adsorption behavior on the surface of Al₂O₃/CNT was investigated. The results indicated that Al₂O₃/CNT had a high adsorption capacity. The fluoride adsorption capacity of the Al₂O₃/CNT, which was prepared under the conditions of 450 ℃ calcination temperature and 30% Al₂O₃ supported, was 2.0-3.5 times that of γ-Al₂O₃ and almost equals to that of IRA-410 polymeric resin. The adsorption isotherms of fluoride on Al₂O₃/CNT fit the Freundlich equation well, and optimal pH ranging from 5.0 to 9.0.

Key words: Carbon nanotubes, Supported alumina, Adsorption, Defluoride

CLC Number:

O614

TrendMD:

WANG Shu-Guang, LI Yan-Hui, ZHAO Dan, ZHAO Hua-Zhang, XU Cai-Lu, LUAN Zhao-Kun, LIANG Ji, WU De-Hai . Studies on the Preparation of Alumina Supported on Carbon Nanotubes and Defluorination from Absorbed Water[J]. Chem. J. Chinese Universities, 2003, 24(1): 95.

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Studies on the Preparation of Alumina Supported on Carbon Nanotubes and Defluorination from Absorbed Water

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