Spatial charge separation on the (110)/(102) facets of cocatalyst-free ZnIn2S4 for the selective conversion of 5-hydroxymethylfurfural to 2,5-diformylfuran

Heng Zhao, Dhwanil Trivedi, Morteza Roostaeinia, Xue Yong, Jun Chen, Pawan Kumar, Jing Liu, Bao Lian Su, Steve Larter, Md Golam Kibria, Jinguang Hu

Résultats de recherche: Contribution à un journal/une revueArticleRevue par des pairs


Photorefining of biomass and its derivatives to value-added chemicals is an alternative solution to address the global energy shortage and environmental issues. Herein, efficient and selective oxidation of 5-hydroxymethylfurfural (HMF, 91.1% conversion) to 2,5-diformylfuran (DFF, 99.4% selectivity) is demonstrated by visible light-driven photocatalysis over cocatalyst-free ZnIn2S4 nanosheets with crystal facet engineering. The spatial accumulation of photogenerated electrons and holes on the (110) and (102) crystal facets triggers a two-electron oxygen reduction reaction (2e-ORR) for H2O2 generation and HMF oxidation into DFF, respectively. The severe attenuation of photostability is caused by the irreversible photocorrosion of Zn-S with the formation of Zn-O chemical bonds by the formation of ˙OH from the in situ decomposition of H2O2. Spontaneous substitution of oxygen with sulfur has been proven to efficiently improve the photostability of ZnIn2S4. This present work provides insights into improving the durability of ZnIn2S4 and sheds new light on biomass valorization via photorefinery.

langue originaleAnglais
Pages (de - à)692-699
Nombre de pages8
journalGreen Chemistry
Numéro de publication2
Les DOIs
Etat de la publicationPublié - 20 déc. 2022

Contient cette citation