Anodic preparation of porous TiO2 in fluoride solution

M. Aggour, Th Dittrich, A. Belaidi, I. Sieber, J. Rappich

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Abstract

Thick and homogeneous layers of porous TiO2 (anatase and amorphous phases) have been prepared by anodization of Ti foils in fluoride solutions. The porous TiO2 layers have been investigated by electron microscopy, Raman spectroscopy and photovoltage spectroscopy. The nanostructure of the porous TiO2 layers depends sensitively on the pH and on the concentration of the NH4F solution. The photovoltage spectra of as-prepared samples are dominated by defects (electron traps) below the bandgap of anatase. The defects are removed after annealing in air.

Original languageEnglish
Pages (from-to)3344-3348
Number of pages5
JournalPhysica Status Solidi C: Conferences
Volume2
Issue number9
DOIs
Publication statusPublished - 7 Nov 2005

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ASJC Scopus subject areas

  • Condensed Matter Physics

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