Selective oxidation of 5-hydroxymethylfurfural to furan-2, 5-dicarbaldehyde using chitosan-based biochar composite cadmium sulfide quantum dots. (15th July 2022)

• Record Type: Journal Article
• Authors: Yuan, Chuan; Liu, Qian; Wei, Manman; Zhao, Shuang; Yang, Xuping; Cao, Bin; Wang, Shuang; El-Fatah Abomohra, Abd; Liu, Xinlin; Hu, Yamin
• Is Part Of: Fuel. Volume 320(2022)
• Publication Date: 2022-07-15
• Subjects: Biomass -- Oxidation -- Chitosan -- Composite photocatalyst -- 5-hydroxymethyl furfural; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2022.123994
• Languages: English
• ISSNs: 0016-2361

Abstract

Graphical abstract: Highlights: Use photocatalytic technology to oxidize HMF to prepare high-value chemical DFF, and realize the high selectivity of HMF to generate DFF. The nitrogen-doped porous composite material with rich pore structure and excellent adsorption performance is designed and synthesized with chitosan as the carbon source. The CdS QDs/biochar composite photocatalyst expands the response range of visible light, improves the utilization of solar energy and inhibits the recombination of photo-generated carriers. Abstract: In the present study, a self-doped N-doped chitosan carbon (Ch) was prepared by activated carbonization as a carrier. A series of CdS QDs/xCh composite photocatalysts were synthesized by hydrothermal method to support CdS QDs with different contents. Catalytic oxidation of 5-hydroxymethyl furfural (HMF) was performed to produce 2, 5-diformyl furan (DFF). Results showed that 20% Ch loading (CC-20), 10 h reaction time, and 1/4 raw material/catalyst ratio, HMF conversion rate of 78.73% and DFF selectivity of 97.31% were achieved. Through 5 cycles of experiments on CC-20, results showed less than 10% reduction in photocatalytic degradation rate of CC-20 composite photocatalyst, which confirms good stability and cyclability of the catalyst. Finally, through a series of characterization, the structure, composition, morphology, and photoresponse properties of the composite photocatalyst were investigated; at the same time, the mechanism and conversion path of CdS QDs/Ch photocatalyst were explored.