TiO2 modification by gold (Au) for photocatalytic hydrogen (H2) production

Bhavana Gupta, Ambrose A. Melvin, Tom Matthews, S. Dash, A. K. Tyagi

Research output: Contribution to journalReview articlepeer-review

120 Scopus citations

Abstract

TiO2 is indeed one of the widely used semiconductors employed for photocatalytic hydrogen production. Most of its photocatalytic activity is achieved in its crystalline form. However, its photocatalytic activity is limited to ultraviolet region. For making TiO2 visible light active; Au deposition is strongly recommended due to its surface plasmon feature. Au deposition enhances the photocatalytic activity of both crystalline and nanocrystalline TiO2. Efficiency of photocatalytic activity is controlled by shape and size of Au nanoparticle subsequently the synthetic methodology plays an important role. Herein, we furnish a brief description of TiO2-Au nanocomposite synthesis by different methods viz. sol-gel, photodeposition, deposition-precipitation simple reducing method and dispersion method. A discussion on physical properties of the resultant material is also provided. Three different types of mechanism has been described depending on the type of irradiation and form of TiO2 (crystalline and nanocrytalline). A comparative hydrogen production yield is also tabulated to get an idea about the best synthesis methodology and form of TiO2 for efficient photocatalysis.

Original languageEnglish
Pages (from-to)1366-1375
Number of pages10
JournalRenewable and Sustainable Energy Reviews
Volume58
DOIs
StatePublished - 1 May 2016
Externally publishedYes

Keywords

  • Gold nanoparticle
  • Hydrogen generation
  • Nanocomposite
  • Photocatalysis
  • TiO

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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