Synthesis of dip coated bismuth vanadium oxide (BiVO4) with iron oxyhydroxides (FeOOH) for photoelectrochemical water splitting applications
by S.R. Sitaaraman; A. Nirmala Grace; Raja Sellappan
International Journal of Nanotechnology (IJNT), Vol. 18, No. 5/6/7/8, 2021

Abstract: Bismuth vanadium oxide (BiVO4) was synthesised by dip coating method. The water oxidation property of the BiVO4 photoanode is hindered by high charge carrier recombination and poor electron transport. FeOOH overlayer enhances the overall water splitting capability of BiVO4. The BiVO4 and FeOOH modified BiVO4 was characterised by X-ray diffractometer (XRD), field emission scanning electron microscope (FESEM), UV-Vis spectrometer, and Raman spectrometer to analyse the material properties. The synthesised BiVO4 showed monoclinic sheelite structure. Photoelectrochemical tests showed the optimised thickness of dip coated BiVO4. The photocurrent of FeOOH modified BiVO4 was found to be higher than BiVO4. The negative shift in onset potential was observed for FeOOH modified BiVO4 due to an improvement in the interfacial charge transfer. The photoelectrochemical measurements proved that the deposition of FeOOH improves the photoelectrochemical activity by reducing the electrode/electrolyte interface resistance.

Online publication date: Mon, 12-Jul-2021

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