期刊
CHEMICAL ENGINEERING JOURNAL
卷 280, 期 -, 页码 90-98出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2015.05.091
关键词
Biomass; Cellulose; Hydrolysis; Glucose; Magnetic solid acid; Fe3O4-RGO-SO3H
资金
- Natural Science Foundation of China [51173128, 31071509]
- 863 Program of China [2012AA06A303, 2013AA102204]
- Ministry of Science and Technology of China [2012YQ090194]
- Beiyang Young Scholar of Tianjin University
- Program of Introducing Talents of Discipline to Universities of China [B06006]
Reduced graphene oxide functionalized with magnetic Fe3O4 nanoparticles and -PhSO3H groups (Fe3O4-RGO-SO3H) was reported for environmentally benign hydrolysis of cellulosic materials, which is an important process in integrated utilization of biomass resource. Except for -PhSO3H groups, -COOH and -OH groups derived from graphene oxide (GO) were also expected in the structure of Fe3O4-RGO-SO3H. Fe3O4-RGO-SO3H exhibited outstanding catalytic performance for the hydrolysis of cellulosic materials, due to its crumpling feature with clear layers and the coexistence of -COOH and -OH groups. The unique structure of Fe3O4-RGO-SO3H favors the accessibility of cellulose to the active sites of the material and facilitates the diffusion of the product molecules. -COOH groups on the surface of the material provide a large concentration of acidic functionality for hydrolyzing cellulose, while -OH groups readily adsorb cellulose through forming strong hydrogen bonds between -OH groups and the oxygen atoms in beta-1,4 glycosidic bonds. Furthermore, Fe3O4-RGO-SO3H can also be easily separated from the reaction residue with an extra magnetic force and further used at least five times. (C) 2015 Elsevier B.V. All rights reserved.
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