Chiang Mai Journal of Science

Transformation of Lignin Model Compound and Lignin by Graphene Oxide Immobilized Laccase

Paper Type	Contributed Paper
Title	Transformation of Lignin Model Compound and Lignin by Graphene Oxide Immobilized Laccase
Author	Xue-Fei Zhou*
Email	lgdx602@sina.com
Abstract:  In the present study, laccase (Lac) was immobilized into molecular sieves (Lac/NaY, Lac/ SSZ, Lac/MCM) and graphene oxide (Lac/GO). The activities of these laccase preparations were comparatively studied on phenolic lignin model compound (vanillyl alcohol), nonphenolic lignin model compound (veratryl alcohol) and organosolv lignin, in the presence of ABTS. GO immobilized laccase (Lac/GO) afforded better performance in terms of conversion rate and reusability than the molecular sieves during oxidation of vanillyl alcohol and veratryl alcohol. GPC and 31P-NMR were used to characterize the structural modifications induced in the organosolv lignin. Compared to the molecular sieves, the GO-immobilized laccase was found to be more reactive, displaying higher distinct reaction selectivities in the oxidative pattern of the lignin.
Start & End Page	176 - 184
Received Date	2020-07-19
Revised Date
Accepted Date	2020-10-04
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Keyword	laccase, lignin model compound, immobilization, oxidation, lignin
Volume	Vol.48 No.1 (January 2021)
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