Immobilization of laccase on a novel ZnO/SiO2 nano-composited support for dye decolorization

2015 Global Conference on Polymer and Composite Materials

材料科学;化学

Li, Wei-Xun^1 ; Sun, Huai-Yan^1 ; Zhang, Rui-Feng^1

Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang

315211, China^1

关键词: Dye decolorization;    Hydrothermal growth;    Immobilized laccase;    Loading amount;    Remazol brilliant blues;    Static adsorption;    Trametes versicolor;    ZnO nanowires;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/87/1/012033/pdf
DOI  :  10.1088/1757-899X/87/1/012033

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

ZnO nanowires were introduced into macroporous SiO2by means of in situ hydrothermal growth. The obtained nano-composite was then used to immobilize laccase (secured from Trametes versicolor) through the process of static adsorption. The average loading amount was as high as 193.4 μmol-g-1. The immobilized laccase was proven to be an effective biocatalyst in the decolorization of two dyes: Remazol Brilliant Blue B, and Acid Blue 25. The decolorization percentage of Remazol Brilliant Blue B and Acid Blue 25 reached 93% and 82% respectively. The immobilized laccase exhibited enhanced thermal stability and pH adaptability compared to free laccase. After ten recycles, the immobilized laccase retained 42% decolorization catalytic activity.