Fast charge transfer kinetics in an inorganic–organic S-scheme heterojunction photocatalyst for cooperative hydrogen evolution and furfuryl alcohol upgrading. Issue 42 (11th October 2022)

• Record Type: Journal Article
• Authors: Sun, Lijuan; Wang, Weikang; Kong, Tingting; Jiang, Haopeng; Tang, Hua; Liu, Qinqin
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 42(2022)
• Page Start: 22531
• Page End: 22539
• Publication Date: 2022-10-11
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2ta06468e
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Inorganic Znln2 S4 nanosheets were grown in situ on organic Tp-Tta COF nanoplates to construct an inorganic–organic S-scheme photocatalyst for synergetic hydrogen precipitation and furfuryl alcohol upgrading oxidation. Abstract : An overall reaction integrating hydrogen (H2 ) evolution with organic oxidation achieved by a photocatalytic redox system is highly desirable and still challenging. The emerging step (S)-scheme heterojunction is expected to be a promising strategy to provide photogenerated charges with the highest redox potentials for synchronous H2 evolution and organic oxidation. Here, an inorganic–organic S-scheme photocatalyst was constructed by in situ growth of Znln2 S4 nanosheets on Tp-Tta COF nanoplates, forming a unique hierarchical sandwich-like structure. The prepared Znln2 S4 /Tp-Tta COF photocatalyst followed an S-scheme heterojunction mechanism with a strong interfacial internal electric field, 4.15 and 194 times higher than those of pure Znln2 S4 and the Tp-Tta COF, respectively. Consequently, the optimal photocatalytic simultaneous furfural production and H2 evolution performance achieved 12.1 and 9.73 mmol g −1 h −1, respectively, with a total quantum yield of 13.91%. This work provides a basis for the rational design of S-scheme photocatalysts to realize the synergetic and efficient utilization of photogenerated electrons and holes.