A tailored bifunctional carbon catalyst for efficient glycosidic bond fracture and selective hemicellulose fractionation.
Bioresour Technol
; 362: 127861, 2022 Oct.
Article
em En
| MEDLINE
| ID: mdl-36041679
ABSTRACT
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 m2/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 â¼40% within 6 h. Moreover, the catalysts had strong fracture characteristics on different α-/ß-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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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Carbono
/
Glicosídeos
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article