Value-added conversion of lignocellulose is a sustainable approach. Photo-refining biomass is in line with current environmental protection strategies. However, photo-reforming biomass suffers from poor catalyst stability and low conversion efficiency. Here, we designed fructose as a lignocellulosic model. The heterogeneous structure of Prussian blue coating was constructed with a special covalent bond structure of Co CN Zn. This structure has a catalytic conversion mechanism that can accelerate electron transfer. Fructose was simultaneously converted to value-added platform compounds (5-HMF and formic acid) and gaseous fuels (CO, CH 4 ) with a conversion rate of up to 92.5%, which is more than 1.7 times than that of catalysts without adding Prussian blue. Hydrogen transfer and carbon transfer on the carbon atoms of fructose facilitates the production and accelerates the spillover of CO from formic acid. This work provides new ideas for the development of Prussian blue catalysts and the conversion of pentose.
Fuhua Zhao,Hui Li,Yijun Jiang,Xicheng Wang,Xindong Mu
Here we report a simple and efficient approach to fabricate a new biocatalytic system by co-immobilizing multi-enzyme on chemically reduced graphene oxide (CRGO) via non-covalent bonds. The obtained artificial biocatalyst was characterized by UV/Vis, FTIR, AFM, TEM and SEM. Compared with native and graphene oxide (GO) bounded enzymes, it was found that the glucose oxidase (GOD) or glucoamylase (GA) immobilized on CRGO exhibited significantly higher enzymatic activity, due to the positive effect of the CRGO carrier. This multi-enzyme microsystem was employed as a biocatalyst to accomplish the starch-to-gluconic acid reaction in one pot, and the yield of gluconic acid could reach 82% within 2 hours. It was also proved that the stability of the multi-enzyme biocatalyst immobilized on CRGO was dramatically enhanced compared with the GO microsystem. About 85% of the activity of the artificial biocatalyst could be preserved after four cycles. These results demonstrated the feasibility of the novel strategy to construct bio-microsystems with multi-enzyme on 2D CRGO via non-covalent bonds to accomplish some complex conversions.
危险品化学品经营许可证（带存储）