Issue 19, 2020

Functional B@mCN-assisted photocatalytic oxidation of biomass-derived pentoses and hexoses to lactic acid

Abstract

The integration of biorefining and photocatalysis is the most promising approach to enable green and efficient synthesis of biomass-based high value chemicals. Herein, a novel and functional carbon nitride photocatalyst was developed to achieve the production of lactic acid under visible-light irradiation. The doping of boron (B) and oxygen (O) atoms in the catalyst (B@mCN-Y) not only reduced the bandgaps, but also improved the separation efficiency of surface photoinduced charge carriers, resulting in an enhanced photocatalytic activity of B@mCN-Y. Furthermore, the catalyst exhibited excellent activity for different biomass-based monosaccharides, and the highest yield was 92.7%. Various oxidative active species of h+, 1O2, ˙O2 and ˙OH all benefit the synthesis of lactic acid, while the effect of h+ is superior to that of the others. The catalyst is also highly stable and recyclable, and the system for producing lactic acid has potential for amplification. The yield and conversion of a one-thousand-fold scale-up experiment retained 68.6% and 89.0% of the values of the one time experiment. This work promotes the development of photocatalytic biomass refining.

Graphical abstract: Functional B@mCN-assisted photocatalytic oxidation of biomass-derived pentoses and hexoses to lactic acid

Supplementary files

Article information

Article type
Paper
Submitted
04 jún 2020
Accepted
31 júl 2020
First published
31 júl 2020

Green Chem., 2020,22, 6384-6392

Functional B@mCN-assisted photocatalytic oxidation of biomass-derived pentoses and hexoses to lactic acid

J. Ma, Y. Li, D. Jin, Z. Ali, G. Jiao, J. Zhang, S. Wang and R. Sun, Green Chem., 2020, 22, 6384 DOI: 10.1039/D0GC01896A

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