Title of Paper:双孔道管状有序介孔炭对维生素B12的吸附缓释性能

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Date of Publication:2011-01-01

Journal:物理化学学报

Volume:27

Issue:9

Page Number:2239-2243

ISSN No.:1000-6818

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 N-2 adsorption analysis. The specific surface area and pore volume were found to be 1856 m(2) . g(-1) and 2.10 cm(3) . 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.

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