Thick porous tungsten trioxide films by anodization of tungsten in fluoride containing phosphoric acid electrolyte

Min Yang, Nabeen K. Shrestha, Patrik Schmuki

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

In the present work, we report on the formation of mesoporous thick tungsten trioxide films grown on tungsten foil by anodization in fluoride containing concentrated phosphoric acid (85%) electrolyte. Under optimized experimental conditions, mesoporous WO3 films with a thickness up to approximately 2 μm are formed. SEM shows the films to consist of a connected network with a typical pore and feature diameter of ca 50 nm. These films as formed are amorphous and can be annealed to orthorhombic WO3 structure. These thick porous films can show significant enhanced electrochromic and improved photocatalytic properties. Crown

Original languageEnglish
Pages (from-to)1908-1911
Number of pages4
JournalElectrochemistry Communications
Volume11
Issue number10
DOIs
StatePublished - Oct 2009

Keywords

  • Anodization
  • Electrochromic
  • Mesoporous
  • Photocatalysis
  • Tungsten trioxide

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