You can view the full text of this article for free using the link below.

Title: Synthesis of dip coated bismuth vanadium oxide (BiVO4) with iron oxyhydroxides (FeOOH) for photoelectrochemical water splitting applications

Authors: S.R. Sitaaraman; A. Nirmala Grace; Raja Sellappan

Addresses: Centre for Nanotechnology Research (CNR), School of Electronics Engineering (SENSE), Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India ' Centre for Nanotechnology Research (CNR), School of Electronics Engineering (SENSE), Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India ' Centre for Nanotechnology Research (CNR), School of Electronics Engineering (SENSE), Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India

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.

Keywords: BiVO4; FeOOH; photoelectrochemical cell; water splitting; solar fuels; dip coating method; photo-assisted electrodeposition; co-catalyst.

DOI: 10.1504/IJNT.2021.116160

International Journal of Nanotechnology, 2021 Vol.18 No.5/6/7/8, pp.374 - 387

Received: 08 May 2021
Accepted: 12 May 2021

Published online: 21 Jun 2021 *

Full-text access for editors Access for subscribers Free access Comment on this article