Magnetically core-shell structure carbon based solid sulfonic acid were prepared and characterized systematically. In a typical procedure, Fe3O4 particles were prepared by following the literature report. The Fe3O4 was then modified by oleic acid under the sonication. A coal pitch layer was produced and polymerization on the surface of nano-Fe3O4 at 573 K for 6 h under O2 atmosphere and followed by carbonization at 773 K in flowing nitrogen. SO3H bearing multifunctional composites were finally prepared with sulfonation process in fuming sulfuric acid.The structure, morphology and ferromagnetic property of ferrite powders and composites were characterized by XPS, TEM, FTIR spectra, and VSM respectively. The advantages, including high acidic concentration and magnetically active, are potentially important for industrial applications of the Core-shell Structure Carbon Based Solid Sulfonic Acid as an efficient heterogeneous solid acid catalyst in the future.
Preparation of Core-Shell Structure Magnetic Carbon-Based Solid Acid and its Catalytic Performance on Hemicellulose in Corncobs