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g-C(3)N(4)/ZnCdS heterojunction for efficient visible light-driven photocatalytic hydrogen production

To suppress the aggregation behavior caused by the high surface energy of quantum dots (QDs), ZnCdS QDs were grown in situ on a g-C(3)N(4) support. During the growth process, the QDs tightly adhered to the support surface. The ZnCdS QDs were prepared by low-temperature sulfurization and cation excha...

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Detalles Bibliográficos
Autores principales: Bai, Tianyu, Shi, Xiaofan, Liu, Ming, Huang, Hui, Zhang, Jijie, Bu, Xian-He
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9043962/
https://www.ncbi.nlm.nih.gov/pubmed/35498108
http://dx.doi.org/10.1039/d1ra05894k
Descripción
Sumario:To suppress the aggregation behavior caused by the high surface energy of quantum dots (QDs), ZnCdS QDs were grown in situ on a g-C(3)N(4) support. During the growth process, the QDs tightly adhered to the support surface. The ZnCdS QDs were prepared by low-temperature sulfurization and cation exchange with a zeolitic imidazolate framework precursor under mild conditions. The heterojunction of g-C(3)N(4)/ZnCdS-2 (CN/ZCS-2, with a g-C(3)N(4) to ZIF-8 ratio of 2.0) not only showed excellent optical absorption performance, abundant reactive sites, and a close contact interface but also effectively separated the photogenerated electrons and holes, which greatly improved its photocatalytic hydrogen production performance. Under visible light irradiation (wavelength > 420 nm) without a noble metal cocatalyst, the hydrogen evolution rate of the CN/ZCS-2 heterojunction reached 1467.23 μmol g(−1) h(−1), and the durability and chemical stability were extraordinarily high.