Photoelectrocatalytic properties of BiVO4 prepared with different alcohol solvents

Francisco Wirley Paulino Ribeiro, Murilo Fernando Gromboni, Frank Marken, Lucia H. Mascaro

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

BiVO4 has been receiving attention for applications in photoelectrochemical devices. This paper describes the effect of different alcohol solvents (ethanol, ethylene-glycol, PEG300 and PEG 400) on the morphology, crystal growth, crystalline size, thickness, photophysical and photoelectrochemical properties of BiVO4 photoanodes prepared from a suitable, simple and inexpensive one-step process. All samples exhibited good crystallinity with the monoclinic phase dominating and with suitable bandgap for visible light harvesting; but the morphology, thickness, and resulting photocurrents varied broadly. The unmodified BiVO4 photoanode prepared with PEG 300, gave a particularly good photocurrent of 0.77 mA cm−2 at 1.23 V vs RHE under illumination of 100 mW cm−2. In this case, a higher value for the ratio between the intensities of the XRD peaks, (040)/(121), was verified, as well as smaller crystallite size. Considering the type of solvent, the BiVO4 photoanode prepared with PEG 300 exhibited a more intense photocurrent. The optimization of the solvent employed in the synthesis of the BiVO4 photoanode is a crucial step in the development of a photoelectrochemical device based on this material.

Original languageEnglish
Pages (from-to)17380-17389
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume41
Issue number39
DOIs
Publication statusPublished - 19 Oct 2016

Keywords

  • Alcohol solvent
  • BiVO
  • Crystal growth
  • Photoelectrocatalysis
  • Water splitting

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