Visible light-active sub-5 nm anatase TiO2 for photocatalytic organic pollutant degradation in water and air, and for bacterial disinfection

Xiaowen Wang, Huawen Hu, Zongyue Yang, Yeeyee Kong, Bin Fei, John Haozhong Xin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

22 Citations (Scopus)


Visible-light-sensitive sub-5 nm anatase titanium dioxide (TiO2) nanoparticles (NPs) were fabricated without any doping and calcination treatments. The energy band gap was effectively narrowed to ~ 2.98 eV. The surface and subsurface hydroxyl defects were ascertained as the origin for the band gap narrowing and for the efficient azo-based dye degradation in water and formaldehyde decomposition in air, as well as disinfection of Staphylococcus aureus bacteria, under visible light irradiation.
Original languageEnglish
Pages (from-to)81-85
Number of pages5
JournalCatalysis Communications
Publication statusPublished - 5 Dec 2015


  • Energy band gap
  • Hydroxyls
  • Sub-5 nm particle size
  • Surface and subsurface defects
  • Visible-light-responsive TiO<inf>2</inf>

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Process Chemistry and Technology

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