The effects of growth conditions on the surface properties and photocatalytic activities of anatase TiO2 films prepared via electrochemical anodizing and annealing methods

Dikici T., YURDDAŞKAL M., DEMİRCİ S., ÇELİK E.

JOURNAL OF POROUS MATERIALS, cilt.24, sa.6, ss.1535-1544, 2017 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 24 Sayı: 6
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1007/s10934-017-0393-2
  • Dergi Adı: JOURNAL OF POROUS MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1535-1544
  • Anahtar Kelimeler: Nanostructured TiO2, Anatase, Photocatalytic activity, Electrochemical anodization, Surface morphology, Methylene blue, NANOTUBE ARRAYS, TITANIUM-DIOXIDE, DOPED TIO2, NANOPOROUS TIO2, TEMPERATURE, FABRICATION, DEGRADATION, OXIDATION, ELECTRODE, LAYER
  • Marmara Üniversitesi Adresli: Evet

Özet

In the present work, nanostructured TiO2 films were prepared by electrochemical anodization process of titanium in fluoride-containing electrolytes using an innovative approach. After anodization, the TiO2 films were annealed at 480 degrees C for 2 h in air in order to acquire anatase phase transformation and increase its crystallinity. The effects of anodization voltage, electrolyte concentration and anodization time on the formation of TiO2 films and the photocatalytic degradation of methylene blue (MB) were discussed in details. The phase structure and surface morphology of the samples characterized by means of X-ray diffraction and scanning electron microscope. The as-prepared nanostructured TiO2 film anodized in 0.5% HF electrolyte at 15 V for 240 min showed excellent photocatalytic degradation of MB and is promising for environmental purification.