g‑C3N4/NiAl-LDH 2D/2D Hybrid Heterojunction for High-Performance Photocatalytic Reduction of CO2 into Renewable Fuels

Surendar Tonda, Santosh Kumar, Monika Bhardwaj, Poonam Yadav, Satishchandra Ogale

Research output: Contribution to journalArticle

118 Citations (Scopus)

Abstract

2D/2D interface heterostructures of g-C 3N 4 and NiAl-LDH are synthesized utilizing strong electrostatic interactions between positively charged 2D NiAl-LDH sheets and negatively charged 2D g-C 3N 4 nanosheets. This new 2D/2D interface heterojunction showed remarkable performance for photocatalytic CO 2 reduction to produce renewable fuels such as CO and H 2 under visible-light irradiation, far superior to that of either single phase g-C 3N 4 or NiAl-LDH nanosheets. The enhancement of photocatalytic activity could be attributed mainly to the excellent interfacial contact at the heterojunction of g-C 3N 4/NiAl-LDH, which subsequently results in suppressed recombination, and improved transfer and separation of photogenerated charge carriers. In addition, the optimal g-C 3N 4/NiAl-LDH nanocomposite possessed high photostability after successive experimental runs with no obvious change in the production of CO from CO 2 reduction. Our findings regarding the design, fabrication and photophysical properties of 2D/2D heterostructure systems may find use in other photocatalytic applications including H 2 production and water purification.

Original languageEnglish
Pages (from-to)2667−2678
Number of pages12
JournalACS Applied Materials and Interfaces
Volume10
Issue number3
Early online date29 Dec 2017
DOIs
Publication statusPublished - 24 Jan 2018

Keywords

  • CO reduction
  • Layered double hydroxide
  • g-C N
  • nanocomposite
  • photocatalysis

ASJC Scopus subject areas

  • Materials Science(all)

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