BiVO/FeO/ZnFeO; Triple Heterojunction for an Enhanced PEC Performance for Hydrogen Generation

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 May 2

PMID 35496341

Authors

Sakshi Saxena

Anuradha Verma

Kumari Asha

Neeraj Kumar Biswas

Anupam Srivastav

Vibha Rani Satsangi

Rohit Shrivastav

Sahab Dass

Affiliations

Soon will be listed here.

Abstract

n/n/n triple heterojunction photoanodes made up of Zr:W-BiVO, FeO, and ZnFeO metal oxides are fabricated through a simplistic spray pyrolysis method. Use of Zr and W as dopants in BiVO plays an important role as Zr increases the carrier density and W reduces the charge recombination. Further, FeO and ZnFeO serve as a protective layer for Zr:W-BiVO, which augmented the photoelectrochemical performance and achieved a 1.90% conversion efficiency in the triple heterojunction. XRD measurements display the crystalline nature and reduction in particle size due to strain in the sample, UV-vis absorbance shows an extended absorption towards the visible region and the FE-SEM imaging confirms the successful deposition of ZnFeO over BiVO/FeO. By analyzing the band edge position, it was observed that on formation, the triple heterojunction not only suppresses the charge carrier recombination but also utilizes the band edge offset for the water splitting reaction using solar energy.

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