Fabrication and photocatalysis of nanostructured TiO 2 for solar hydrogen production
Conference proceedings article
Authors/Editors
Strategic Research Themes
No matching items found.
Publication Details
Author list: Wongwanwattana P., Krongkitsiri P., Limsuwan P., Tipparach U.
Publisher: Elsevier
Publication year: 2012
Volume number: 38
Issue number: SUPPL. 1
Start page: S517
End page: S519
ISSN: 0272-8842
eISSN: 1873-3956
Languages: English-Great Britain (EN-GB)
View in Web of Science | View on publisher site | View citing articles in Web of Science
Abstract
Photoelectrochemical cells (PEC) based on metal-doped (Be and Fe) and Pt-loaded nanostructured-TiO 2 films were fabricated to make working electrodes for solar hydrogen production. Anatase nanocrystalline titania (nano-TiO 2) thin films were deposited on glass slide and Ti metal sheet substrates by a sol-gel dip-coating method. Titanium tetraisopropoxide was used as a precursor. The synthesis process and annealing temperatures play an important role on the crystallite size and the phase transformation of nano-TiO 2. The diameter of the particles in the rage of 5-50 nm was obtained in different methods of making the sol-gels and annealing temperatures. Without an external applied potential, the photocurrent density of Be-doped PEC occurred of 0.32 mA/cm 2 under illumination of 75 mW/cm 2 and the device produced hydrogen by water photoelectrolysis at the rate of 0.1 ml/h cm 2, with a photoconversion efficiencies of 0.52%. The maximum photocurrent density of Fe-doped PEC occurred of 0.80 mA/cm 2 without an external applied potential and under the illumination of 100 mW/cm 2 corresponding with photoconversion efficiency of 0.98%. Impurity phase and undesired phases may be the cause of electron-hole recombination that results in decreasing photocatalytic activity. ฉ 2011 Elsevier Ltd and Techna Group S.r.l.
Keywords
A. Sol-gel processes, D. Titanium dioxide (TiO 2), E. Electrodes, Solar hydrogen production
Contact Information