Vertically-heterostructured TiO2-Ag-rGO ternary nanocomposite constructed with {001} facetted TiO2 nanosheets for enhanced Pt-free hydrogen production

Zhouyou Wang, Ze Xian Low, Xiangkang Zeng, Bin Su, Yichun Yin, Chenghua Sun, Tim Williams, Huanting Wang, Xiwang Zhang

Research output: Contribution to journalArticleResearchpeer-review

17 Citations (Scopus)

Abstract

TiO2 nanosheets with high ratio of {001} facets were coupled with reduced graphene oxide (rGO) nanosheets through the link of silver (Ag) nanoparticles, forming a novel ternary nanocomposite photocatalyst with a vertical heterostructure, TiO2-Ag-rGO. The vertical anchoring of TiO2-Ag nanosheets between rGO sheets was confirmed by transmission electron microscopy (TEM), Raman spectroscopy, energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). Due to excellent separation of electron-hole pairs in the TiO2 nanosheets, enhanced electron transfer to rGO via Ag nanoparticles, the TiO2-Ag-rGO nanocomposite exhibited an outstanding performance in photocatalytic hydrogen production, with a hydrogen production rate of 593.56 μmol g−1 h−1. This study provides new insights to the development of Pt-free photocatalysts for hydrogen production.

Original languageEnglish
Pages (from-to)1508-1515
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume43
Issue number3
DOIs
Publication statusPublished - 18 Jan 2018

Keywords

  • Hydrogen production
  • Ternary nanocomposite
  • Vertically-heterostructured TiO-Ag-rGO
  • {001} facets

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