Porous barium strontium titanate-titania nanocomposites for photocatalytic applications

Guoge Zhang, Haitao Huang, Helen L.W. Chan, Li Min Zhou

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Porous barium strontium titanate-titania (BST-TiO2) nanocomposite was developed by the combination of electrochemical anodization and hydrothermal synthesis. Self organized titania nanotube arrays were first fabricated by electrochemical anodization of titanium foil in 0.2 wt.% HF. The as-anodized titania was then used as a template and was subject to a hydrothermal treatment in the solution mixture of barium hydroxide and strontium hydroxide with different molar ratios. Well crystallized barium strontium titanate was developed directly from the titania nanotubes. Annealing was carried out to transform residual amorphous titania to crystallized anatase, resulting in the porous BST-TiO2nanocomposite. The surface morphology and structure of the nanocomposite were characterized. The photoelectrochemical response of the BST-TiO2composite was investigated and the photocatalytic property was evaluated through the photo-decomposition of an organic dye solution. The effect of hydrothermal parameters on the surface morphology and the photocatalytic activity of the nanocomposite was studied.
Original languageEnglish
Title of host publicationMulti-functional Materials and Structures - International Conference on Multifunctional Materials and Structures
PublisherTrans Tech Publications
Pages936-939
Number of pages4
ISBN (Print)0878493786, 9780878493784
Publication statusPublished - 1 Jan 2008
EventMulti-functional Materials and Structures - International Conference on Multifunctional Materials and Structures - Hong Kong, P.R., Hong Kong
Duration: 28 Jul 200831 Jul 2008

Publication series

NameAdvanced Materials Research
Volume47-50 PART 2
ISSN (Print)1022-6680

Conference

ConferenceMulti-functional Materials and Structures - International Conference on Multifunctional Materials and Structures
Country/TerritoryHong Kong
CityHong Kong, P.R.
Period28/07/0831/07/08

Keywords

  • Barium strontium titanate
  • Nanocomposite
  • Photocatalytic
  • Porous
  • Titania

ASJC Scopus subject areas

  • Engineering(all)

Cite this