A tailored bifunctional carbon catalyst for efficient glycosidic bond fracture and selective hemicellulose fractionation
文献类型： 外文期刊
作者： Sun, Chihe 1 ; Wu, Wenbo 2 ; Chang, Haixing 2 ; Wang, Rupeng 3 ; Wang, Ke 3 ; Zhong, Nianbing 4 ; Zhang, Ting 2 ; He, Xuefeng 4 ; Sun, Fubao 1 ; Zhang, Ezhen 5 ; Ho, Shih-Hsin 3 ;
作者机构： 1.Jiangnan Univ, Sch Biotechnol, Key Lab Ind Biotechnol MOE, Wuxi 214122, Peoples R China
2.Chongqing Univ Technol, Sch Chem & Chem Engn, Chongqing 400054, Peoples R China
3.Harbin Inst Technol, Sch Environm, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China
4.Chongqing Univ Technol, Intelligent Fiber Sensing Technol Chongqing Munici, Chongqing Key Lab Fiber Opt Sensor & Photodetector, Chongqing 400054, Peoples R China
5.Guangxi Acad Agr Sci, Inst Agroprod Proc Sci & Technol, Nanning 530007, Peoples R China
关键词： Lignocellulose; Carbon-based solid acids; Polydopamine; Heterogeneous hydrolysis; Pretreatment
期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：11.889； 五年影响因子：11.139 ）
ISSN： 0960-8524
年卷期： 2022 年 362 卷
页码：
收录情况： SCI
摘要： This study proposed a mild chlorination-sulfonation approach to synthesize magnetic carbon acid bearing with catalytic SO3H and adsorption Cl bifunctional sites on polydopamine coating. The catalysts exerted good textural structure and surface chemical properties (i.e., porosity, high specific surface area of >70 m(2)/g, high catalytic activity with 0.86-1.1 mmol/g of SO3H sites and 0.8%-1.9% of Cl sites, and abundant hydrophilic functional groups), rendering a maximum cellobiose adsorption efficiency of similar to 40% within 6 h. Moreover, the catalysts had strong fracture characteristics on different alpha-/beta-glycosidic bonds with 85.4%-93.9% of disaccharide conversion, while selectively fractionating hemicellulose from wheat straw with 64.3% of xylose yield and 93.4% of cellulose retention. Due to the stable interaction between parent polydopamine support with Fe core and functional groups, the catalysts efficiently recovered by simple magnetic separation had good reusability with minimal losses in catalytic activity.
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