π–π interaction between metal–organic framework and reduced graphene oxide for visible-light photocatalytic H2 production.

Karthik, Peramaiah; Vinoth, Ramalingam; Zhang, Peng; Choi, Wonyong; Balaraman, Ekambaram; Neppolian, Bernaurdshaw

Abstract

Solar water splitting provides a promising path for sustainable hydrogen production and solar energy storage. In recent times, metal-organic frameworks (MOFs) have received considerable attention as promising materials for diverse solar energy conversion applications. However, their photocatalytic performance is poor and rarely explored due to rapid electron-hole recombination. Herein, we have developed a material MOF@rGO that exhibits highly enhanced visible-light photocatalytic activity. A real-time investigation reveals that a strong π-π interaction between MOF and rGO is responsible for efficient separation of electron-hole pairs, and thereby enhances the photocatalytic hydrogen production activity. Surprisingly, MOF@rGO showed ∼9.1-fold enhanced photocatalytic hydrogen production activity compared to that of pristine MOF. In addition, it is worth mentioning here that remarkable apparent quantum efficiency (0.66%) is achieved by π-π interaction mediated charge carrier separation.

Citation

KARTHIK, P., VINOTH, R., ZHANG, P., CHOI, W., BALARAMAN, E. and NEPPOLIAN, B. 2018. π–π interaction between metal–organic framework and reduced graphene oxide for visible-light photocatalytic H2 production. ACS applied energy materials [online], 1(5), pages 1913-1923. Available from: https://doi.org/10.1021/acsaem.7b00245

• Journal Article Type: Article
• Acceptance Date: Apr 19, 2018
• Online Publication Date: Apr 19, 2018
• Publication Date: May 29, 2018
• Deposit Date: Oct 24, 2023
• Publicly Available Date: Jun 13, 2024
• Journal: ACS applied energy materials
• Electronic ISSN: 2574-0962
• Publisher: ACS Publications
• Peer Reviewed: Peer Reviewed
• Volume: 1
• Issue: 5
• Pages: 1913-1923
• DOI: https://doi.org/10.1021/acsaem.7b00245
• Keywords: Metal−organic framework; π−πinteraction; Reduced graphene oxide; Photocatalyst; Hhydrogen production
• Public URL: https://rgu-repository.worktribe.com/output/2120497