Microwave synthesized nano-photosensitizer of CdS QD/MoO3–OV/g–C3N4 heterojunction catalyst for hydrogen evolution under full-spectrum light. Issue 18 (15th December 2020)

• Record Type: Journal Article
• Authors: Devarayapalli, K.C.; Lee, Kiyoung; Nam, Nguyen Dang; Vattikuti, S.V. Prabhakar; Shim, Jaesool
• Is Part Of: Ceramics international. Volume 46:Issue 18(2020)Part A
• Page Start: 28467
• Page End: 28480
• Publication Date: 2020-12-15
• Subjects: CdS QDs -- Visible photocatalyst -- Layered material -- Water splitting; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.08.004
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this study, facile solid-state CdS quantum dots (QDs) supported MoO3 /g-C3 N4 nanostructure photocatalysts were prepared via an innovative in-situ deposition protocol with consecutive ionic layer adsorption and reaction. The CdS QDs-anchored MoO3 /g-C3 N4 heterostructure photocatalysts demonstrated enhanced visible-light absorption capacity, which was realized by the quantum confinement of the CdS QDs. The maximum photocatalytic hydrogen (H2 ) production rate with the CdS QDs-anchored MoO3 /g-C3 N4 heterostructure photocatalysts reached 294.32 μmol g − 1 h −1, which was 76.84, 215.21, 27.12, and 3.64 folds superior as compare to bare g-C3 N4, MoO3, CdS, and MoO3 /g-C3 N4 catalysts, respectively. The enriched photocatalytic performance was mainly credited to the high surface area and MoO3 with oxygen vacancies (OV), ultra-thin g-C3 N4 and high optical adsorption ability of CdS QDs. Thus, forming a dual Z-scheme system in the CdS QDs-supported MoO3 -OV/g-C3 N4 nanostructures not only facilitated efficient interfacial charge transfer but also preserved the robust redox ability of the photoinduced electrons and holes.