Jump to main content
Jump to site search


Enhanced Photoelectrochemical Response of Plasmonic Au Embedded BiVO4/Fe2O3 Heterojunction

Abstract

The effect of embedding Au nanoparticles (NPs) in BiVO4/Fe2O3 heterojunction for photoelectrochemical water splitting is studied here for the first time. The present nanostructured heterojunction offers three major advantages over pristine BiVO4 and Fe2O3: i) The formation of heterojunction between BiVO4 and Fe2O3 enhances the charge carrier separation and transfer, ii) The layer of Fe2O3 provides protection to BiVO4 from photocorrosion and, iii) The Au NPs possessing surface plasmon resonance (SPR) enhances the photoelectrochemical response by transferring energy to metal oxides by hot electron transfer (HET) and plasmon resonant energy transfer (PRET). The present study reveals that heterojunction ITO/BiVO4/Fe2O3 (with 32% v/v Au Solution in both the layers) gives the best performance and mitigates the limitation of both pristine Fe2O3 and BiVO4. Thirteen fold increment in applied bias photon to current conversion efficiency (ABPE) was observed at 1.24 V vs RHE under 1 sun illumination condition. Monochromatic incident photon-to-current conversion efficiency (IPCE) measurements indicated that Au embedded heterojunction is more effective in harvesting the visible light in comparison to the heterojunction without Au NPs.

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 05 Apr 2017, accepted on 18 May 2017 and first published on 18 May 2017


Article type: Paper
DOI: 10.1039/C7CP02183F
Citation: Phys. Chem. Chem. Phys., 2017, Accepted Manuscript
  •   Request permissions

    Enhanced Photoelectrochemical Response of Plasmonic Au Embedded BiVO4/Fe2O3 Heterojunction

    A. Verma, A. Srivastav, S. A. Khan, V. Satsangi, R. Shrivastav, D. Avasthi and S. Dass, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP02183F

Search articles by author