Journal
CARBON
Volume 50, Issue 8, Pages 2976-2986Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2012.02.080
Keywords
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Funding
- National Natural Science Foundation of China [21074049]
- National Training Fund for Talented Person of Basic Subjects [J0730425, J1010067]
- Opening Foundation of State Key Laboratory of Applied Organic Chemistry [SKLAOC-2009-35]
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Graphite nanosheets (GNSs) decorated with Fe3O4 nanoparticles were synthesized by an inverse coprecipitation method. The Fe3O4-GNS hybrid material was characterized by transmission electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, nitrogen adsorption/desorption isotherms, thermogravimetry and magnetic hysteresis studies. We demonstrated that the Fe3O4-GNS hybrid material had a flexible interleaved structure, a large specific surface area, high magnetic sensitivity, and good thermal stability. The amino functionalization of the material with 3-aminopropyltriethoxysilane produced a magnetic material that was used in the immobilization of glucoamylase by using glutaraldehyde as a coupling reagent. The results showed that the immobilized glucoamylase exhibited excellent activity and reusability. (C) 2012 Elsevier Ltd. All rights reserved.
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