Synthesis, characterization and performance evaluation of three-layered photoanodes by introducing a blend of WO3 and Fe2O 3 for dye degradation

Soraya Hosseini, Ehsan Eftekhari, Salman Masoudi Soltani, Farahnaz Eghbali Babadi, Lorna Effery Minggu, Mohd Halim Shah Ismail

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A three-layered photoanode has been synthesized by the introduction of an additional layer of mixed WO3 and Fe2O3. A total of nine differently-packaged films were prepared by sol-gel method. The fabricated photoanodes were then successfully characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). A comparative study was also done to differentiate the films fabricated with WO3, Fe2O3 and their mixture. Compact, columnar tree and shallow patterns were observed on the cross cleavage of the synthesized layers. These distinct patterns were associated with the growth of layers which consequently led to unique surface morphologies. An increase in photocurrent density was observed on the bicomponent film which has been linked to a high degree of surface roughness as well as improved internal porosity. Three-layered photoanodes, modified with an additional bicomponent layer of WO3:Fe2O3 established much higher photocurrent outputs compared to that of nanostructured WO3 or Fe2O3, regardless of the bicomponent layer arrangement. However, with the bicomponent layer on top and middle, the measured photocurrent soared more than three times as much compared to a slight increase observed when the bicomponent was placed on the bottom.

Original languageEnglish
Pages (from-to)53-61
Number of pages9
JournalApplied Surface Science
Volume289
DOIs
Publication statusPublished - 15 Jan 2014

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Photocurrents
Coloring Agents
Dyes
Degradation
X ray diffraction analysis
Sol-gel process
Surface morphology
Porosity
Surface roughness
Scanning electron microscopy

Keywords

  • Bicomponent
  • FeO
  • Multi-layered photoanode
  • WO

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

Synthesis, characterization and performance evaluation of three-layered photoanodes by introducing a blend of WO3 and Fe2O 3 for dye degradation. / Hosseini, Soraya; Eftekhari, Ehsan; Masoudi Soltani, Salman; Babadi, Farahnaz Eghbali; Effery Minggu, Lorna; Ismail, Mohd Halim Shah.

In: Applied Surface Science, Vol. 289, 15.01.2014, p. 53-61.

Research output: Contribution to journalArticle

Hosseini, Soraya ; Eftekhari, Ehsan ; Masoudi Soltani, Salman ; Babadi, Farahnaz Eghbali ; Effery Minggu, Lorna ; Ismail, Mohd Halim Shah. / Synthesis, characterization and performance evaluation of three-layered photoanodes by introducing a blend of WO3 and Fe2O 3 for dye degradation. In: Applied Surface Science. 2014 ; Vol. 289. pp. 53-61.
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