0D/2D AgInS 2 /MXene Z-scheme heterojunction nanosheets for improved ammonia photosynthesis of N 2

Jiangzhou Qin, Xia Hu, Xinyong Li, Zhifan Yin, Baojun Liu, Kwok ho Lam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

69 Citations (Scopus)

Abstract

In order to explore efficient photocatalysts for N 2 reduction reaction (NRR), 0D AgInS 2 nanoparticles and 2D MXene (Ti 3 C 2 ) nanosheets with different mass ratios are employed for building Z-scheme heterostructures. The resultant hybrids exhibit excellent interfacial charge transfer ability according to their optical and photo-electro properties. As a result, the obtained composite (30 wt% AgInS 2 ) shows significant improvement on the photocatalytic performance for N 2 fixation with a high ammonia yield rate of 38.8 μmol/(g∙h) under visible-light illumination (>400 nm). Meanwhile, the DFT calculations show that the activation of N 2 in a dinuclear end-on bound structure could lead to high adsorption energy (E ad = −5.20 eV). Moreover, the mechanism of enhanced photocatalytic activity was proposed in terms of the quantum calculation between Ti 3 C 2 and N 2 . This work provides new systems for enhanced NRR performance.

Original languageEnglish
Pages (from-to)27-35
Number of pages9
JournalNano Energy
Volume61
DOIs
Publication statusPublished - Jul 2019

Keywords

  • AgInS /MXene heterojunction
  • DFT calculations
  • N reduction
  • Photocatalysis

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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