Efficient photoelectrochemical performance of γ irradiated g-C 3 N 4 and its g-C 3 N 4 @BiVO 4 heterojunction for solar water splitting

Nurul Aida Mohamed, Habib Ullah, Javad Safaei, Aznan Fazli Ismail, Mohamad Firdaus Mohamad Noh, Mohd Fairuz Soh, Mohd. Adib Ibrahim, Norasikin Ahmad Ludin, Mohd Asri Mat Teridi

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Abstract

Comprehensive experimental and density functional theory simulations have been performed for the enhanced photoelectrochemical performance of Î 3 irradiated g-C 3 N 4 and its heterojunction with BiVO 4 . The structure and morphology of g-C 3 N 4 @BiVO 4 as a heterojunction were analyzed and verified from the correlation of experimental and theoretical data. It is found that γ radiations have changed the bonding structure of g-C 3 N 4 , which ultimately reduces the optical band gap energy. Moreover, the performance of γ irradiated g-C 3 N 4 is two-fold, compared to that of the nonirradiated one, and increases from 3.59 to 5.86 μA cm -2 at 1.23 V versus Ag/AgCl in 0.5 M Na 2 SO 4 electrolyte solution (pH 7). Finally, it is observed that the performance of γ irradiated g-C 3 N 4 in the g-C 3 N 4 @BiVO 4 heterojunction increased from 0.53 to 1.38 mA cm -2 , compared to that of the nonirradiated one. In summary, it has been concluded that γ irradiated g-C 3 N 4 and its heterojunction can potentially be applied in PEC solar water splitting.

Original languageEnglish
Pages (from-to)9013-9026
Number of pages14
JournalJournal of Physical Chemistry C
Volume123
Issue number14
DOIs
Publication statusPublished - 11 Apr 2019

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water splitting
Heterojunctions
heterojunctions
Water
Optical band gaps
Electrolytes
Density functional theory
electrolytes
density functional theory
Radiation
radiation
simulation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Efficient photoelectrochemical performance of γ irradiated g-C 3 N 4 and its g-C 3 N 4 @BiVO 4 heterojunction for solar water splitting . / Mohamed, Nurul Aida; Ullah, Habib; Safaei, Javad; Ismail, Aznan Fazli; Mohamad Noh, Mohamad Firdaus; Soh, Mohd Fairuz; Ibrahim, Mohd. Adib; Ahmad Ludin, Norasikin; Mat Teridi, Mohd Asri.

In: Journal of Physical Chemistry C, Vol. 123, No. 14, 11.04.2019, p. 9013-9026.

Research output: Contribution to journalArticle

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AU - Safaei, Javad

AU - Ismail, Aznan Fazli

AU - Mohamad Noh, Mohamad Firdaus

AU - Soh, Mohd Fairuz

AU - Ibrahim, Mohd. Adib

AU - Ahmad Ludin, Norasikin

AU - Mat Teridi, Mohd Asri

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