Nanostructured BiVO4 obtained by the vanadium calcination of Bi2O3 nanohelixes for enhanced photoelectrochemical water splitting

Sucheol Ju, Noho Lee, Hansang Sung, Soomin Son, Nakhyun Kim, Jaerim Kim, Jong kyu Kim, Heon Lee

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Although BiVO4 has been investigated as a promising photoanode for solar water splitting, the lack of a nanostructure synthesis method that provides the controllability of the stoichiometric composition prevents the realization of a high-performance BiVO4 photoanode. This paper presents an effective and simple synthetic method for fabricating BiVO4 with a high-quality and unique nanostructure from an array of Bi2O3 nanohelixes using oblique angle deposition via vanadium calcination. The porous open structure of the nanohelical Bi2O3 array facilitates the intrusion of vanadium solution during the solvothermal process, thus allowing for the formation of a BiVO4 nanostructural array with high crystallinity. The combination of significant light-scattering, improved charge separation, and an enlarged active surface area allows for the unique BiVO4 nanostructure to exhibit enhanced optical properties and a photocurrent density of 2.6 mA cm−2 at 1.23 V versus the reversible hydrogen electrode.

Original languageEnglish
Pages (from-to)17644-17650
Number of pages7
JournalJournal of Materials Chemistry A
Volume11
Issue number33
DOIs
Publication statusPublished - 2023 Jul 20

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science and ICT [grant numbers NRF-2019M3E6A1064521, NRF-2021M2E8A1049070, NRF-2020K1A3A1A19088593, NRF- 2022M3H4A1A02046445, NRF-2018M3D1A1058997, NRF-2019K1A47A02113032, and NRF-2017-Global PhD Fellowship Program] and the Technology Innovation Program funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea) [20016234, Nano-molding materials with ultra-High refractive index for meta-lens].

Publisher Copyright:
© 2023 The Royal Society of Chemistry.

ASJC Scopus subject areas

  • General Chemistry
  • Renewable Energy, Sustainability and the Environment
  • General Materials Science

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