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Acta Phys. Chim. Si.n  2011, Vol. 27 Issue (09): 2239-2243    DOI: 10.3866/PKU.WHXB20110834
PHYSICAL CHEMISTRY OF MATERIALS     
Adsorption and Release Behavior of Vitamin B12 in Tubular Structured Ordered Mesoporous Carbon
WANG Xiao-Rong, HAO Guang-Ping, LU An-Hui, LI Wen-Cui
State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116023, Liaoning Province, P. R. China
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Abstract  Ordered mesoporous carbon with hexagonal arrays consisting of tubular-type pores (CMK-5) was synthesized via a nanocasting process by the direct use of SBA-15 as a template, furfuryl alcohol as a carbon source and oxalic acid as the catalyst. The structure of CMK-5 was analyzed by different techniques including scanning electron microscopy, powder X-ray diffraction and N2 adsorption analysis. The specific surface area and pore volume were found to be 1856 m2·g-1 and 2.10 cm3·g-1, respectively, with mesopore sizes concentrated at 3.1 and 5.5 nm. Because of the unique structure the adsorption capacities of CMK-5 towards vitamin B12 was found to be as high as 943 mg·g-1 in a short period of 120 min, which is significantly higher than that of commercial activated carbon. The composites of CMK-5 and vitamin B12 without any treatment gave slow-release performance in a simulated body fluid. The concentration of the release solutions remained 9 mg·L-1 under dynamic conditions. A high loading capacity and slow release rate of vitamin B12 on the CMK-5 support suggested that CMK-5 might have a potential application in drug delivery.

Key wordsOrdered mesoporous carbon      Dual-model pore channel      Vitamin B12      Adsorption      Drug release     
Received: 18 April 2011      Published: 27 June 2011
MSC2000:  O647  
Fund:  

The project was supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China (20100041110017).

Corresponding Authors: LI Wen-Cui     E-mail: wencuili@dlut.edu.cn
Cite this article:

WANG Xiao-Rong, HAO Guang-Ping, LU An-Hui, LI Wen-Cui. Adsorption and Release Behavior of Vitamin B12 in Tubular Structured Ordered Mesoporous Carbon. Acta Phys. Chim. Si.n, 2011, 27(09): 2239-2243.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB20110834     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2011/V27/I09/2239

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