Maximizing the visible light photoelectrochemical activity of B/N-doped anatase TiO2 microspheres with exposed dominant {001} facets

Xingxing Hong, Yuyang Kang, Chao Zhen, Xiangdong Kang, Li-Chang Yin, John T. S. Irvine, Lianzhou Wang, Gang Liu, Hui-Ming Cheng

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11 Citations (Scopus)

Abstract

Anatase TiO2 microspheres with exposed dominant BBBBB001BBBBB facets were doped with interstitial boron to have a concentration gradient with the maximum concentration at the surface. They were then further doped with substitutional nitrogen by heating in an ammonia atmosphere at different temperatures from 440 to 560°C to give surface N concentrations ranging from 7.03 to 15.47 at%. The optical absorption, atomic and electronic structures and visible-light photoelectrochemical water oxidation activity of these materials were investigated. The maximum activity of the doped TiO2 was achieved at a nitrogen doping temperature of 520°C that gave a high absorbance over the whole visible light region but with no defect-related background absorption.
Original languageEnglish
Pages (from-to)831-838
Number of pages8
JournalScience China Materials
Volume61
Issue number6
Early online date15 Mar 2018
DOIs
Publication statusPublished - Jun 2018

Keywords

  • Photoelectrochemistry
  • Red TiO2
  • Water splitting
  • Doping

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