Study on photocurrent of bilayers photoanodes using different combination of WO3 and Fe2O3

Amir Memar, Wan Ramli Wan Daud, Soraya Hosseini, Ehsan Eftekhari, Lorna Effery Minggu

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Bilayer photoanodes were prepared onto glass substrates (FTO) in order to improve generated photocurrents using UV-vis light by water splitting process. A comparative study of photocatalytic was performed over the films surface using Fe2O3, WO3 and mixture of bicomponents (Fe2O3:WO3). Different types of films were prepared using Fe2O3, WO3 and bicomponents (mixture) on FTO substrates. The films were grown by sol gel method with the PEG-300 as the structure-directing agent. The photo-generated of the samples were determined by measuring the currents and voltages under illumination of UV-vis light. The morphology, structure and related composition distribution of the films have been characterized by SEM, XRD and EDX respectively. Photocurrent measurements indicated surface roughness as the effective parameter in this study. The deposited surfaces by bicomponents or mixture are flat without any feature on the surface while the deposited surfaces by WO3 appears rough surface as small round (egg-shaped particles) and cauliflower-like. The surface deposited by Fe2O3 show rough no as well as WO3 surface. The deposited surfaces by WO3 reveal the higher value of photocurrent measurement due to surface roughness. Indeed, the roughness can be effective in increasing contact surface area between film and electrolyte and diffuse reflection (light scattering effect). The solution (Fe2O3:WO3) shows the low photocurrent value in compare to WO3 and Fe2O3 hat it may be due to decomposition the compound at 450±1°C to iron-tungstate Fe2(WO4)3.

Original languageEnglish
Pages (from-to)1538-1544
Number of pages7
JournalSolar Energy
Volume84
Issue number8
DOIs
Publication statusPublished - Aug 2010

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Photocurrents
Surface roughness
Ultraviolet radiation
Substrates
Light scattering
Sol-gel process
Electrolytes
Polyethylene glycols
Energy dispersive spectroscopy
Iron
Lighting
Decomposition
Glass
Scanning electron microscopy
Water
Electric potential
Chemical analysis

Keywords

  • FeO
  • Photoelectrolysis
  • Water splitting
  • WO

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Study on photocurrent of bilayers photoanodes using different combination of WO3 and Fe2O3 . / Memar, Amir; Wan Daud, Wan Ramli; Hosseini, Soraya; Eftekhari, Ehsan; Effery Minggu, Lorna.

In: Solar Energy, Vol. 84, No. 8, 08.2010, p. 1538-1544.

Research output: Contribution to journalArticle

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