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Chemical Engineering Journal

Chemical Engineering Journal

IF: 13.3
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Sulfur-vacancy-enriched ZnIn2S4 mediates efficient charge transfer for hydrogen evolution from lignocellulose photoreforming

Published:9 December 2024 DOI: 10.1016/j.cej.2024.158433
Jiang He, Zhongqing Yang, Ziqi Wang, Linlin Gu, Jiaqi Qiu, Jingyu Ran

Abstract

The rapid recombination of photogenerated electron-hole pairs and the slow electron transfer rate at the catalyst-solution interface seriously limit hydrogen production from α-cellulose photoreforming. Herein, a sulfur-vacancy-enriched ZnIn2S4 (SVH-ZIS) photocatalyst was prepared, and Pt nanoclusters were grown on its surface by in situ photodeposition. Sulfur vacancies coupling Pt nanoclusters optimize the electron transport channel and realize efficient electron migration from α-cellulose to H+ through the photocatalyst. The construction of sulfur vacancies promoted the formation of ·OH and enhanced the adsorption and activation of glucose, which significantly improved the oxidation of α-cellulose and accelerated the oxidation kinetics of α-cellulose. Meanwhile, the sulfur vacancies promote the separation efficiency of photogenerated electron-hole pairs and broaden the absorption wavelength range of light. Pt clusters provide hydrogen evolution reaction sites and achieve spatial separation of oxidation and reduction reaction sites. As a result, the hydrogen yield of α-cellulose photoreforming catalyzed by 0.25?% Pt/SVH-ZIS reached 522.76?μmol/g/h, which was 6.02 times that of 0.25?% Pt/SVL-ZIS (sulfur-vacancy-poor ZIS) and significantly higher than that of most previously reported photocatalysts.

Substances (9)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Sodium hydroxide 1310-73-2 NaOH 1212 suppliers $14.00-$16472.00
Formic acid 64-18-6 CH2O2 1167 suppliers $22.13-$5923.38
D(+)-Glucose 50-99-7 C6H12O6 1119 suppliers $6.00-$26950.00
Triethanolamine 102-71-6 C6H15NO3 859 suppliers $18.00-$4666.00
Ethanol 64-17-5 C2H6O 808 suppliers $10.00-$17310.00
Thioacetamide 62-55-5 C2H5NS 653 suppliers $9.00-$1270.00
Zinc acetate dihydrate 5970-45-6 C4H10O6Zn 392 suppliers $13.50-$35640.00
XYLAN 9014-63-5 C5H10O5 290 suppliers $12.50-$841.00
CHLOROPLATINIC ACID HEXAHYDRATE 18497-13-7 Cl6H3OPt- 269 suppliers $50.00-$3840.00

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