A Ni3V2O8@g-CN nanocomposite-based p-n heterojunction: mechanistic insights into photocatalytic activation of the inert C(sp3)-H bond

Anjali Verma, Arpna Jaryal, Deepak Kumar Chauhan, Venugopala Rao Battula, Madhurima Sarkar, Abhijit Patra, Kamalakannan Kailasam

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Selective oxidation of C(sp3)-H bonds of aliphatic hydrocarbons to form value-added chemicals is still a challenging task being pursued. Herein, a p-n heterojunction based Ni3V2O8@g-CN (NVO@g-CN) nanocomposite as a visible light active photocatalyst has been successfully reported for the activation and oxidization of an inert C(sp3)-H bond of cyclohexane under mild reaction conditions. Moreover, the p-n heterojunction formed enhances the charge separation at the interface leading to higher photocatalytic activity. Amid all composites, NVO-1@g-CN showed excellent performance towards the production of cyclohexanone with 93.4% selectivity. The plausible photooxidation mechanism was validated by EPR and UV-vis spectroscopy along with the scavenger experiments. Further mechanistic investigation using techniques like photocurrent density and photoluminescence experiments elucidate that the p-n heterojunction formed at the interface of the catalyst accelerates the charge separation by suppressing the recombination of photogenerated charge carriers. Thus, the p-n heterojunction based NVO@g-CN nanocomposite provides an efficient and sustainable approach for the selective photooxidation of cyclohexane.

Original languageEnglish
Pages (from-to)2727-2739
Number of pages13
JournalSustainable Energy and Fuels
Volume7
Issue number11
DOIs
StatePublished - 27 Apr 2023
Externally publishedYes

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology

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