Photocatalytic reduction of 4-nitroaniline in aqueous solution using BiOCl/BiOBr/rGO ternary heterojunction under simulated UV–visible light irradiation

Salama Alismaail, Salwa Hussein Ahmed, Maram Bakiro, Ahmed Alzamly

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Abstract: BiOCl/BiOBr/rGO ternary heterojunctions were synthesized and characterized, and their photocatalytic activities were examined. Three different rGO mass ratios were incorporated into BiOCl75%BiOBr25%; 1% rGO, 3% rGO, and 5% rGO, respectively. The successful incorporation of rGO into the composites was confirmed using powder X-ray diffraction (PXRD). Furthermore, calculated band gap, elemental composition, and composites’ morphology were investigated using UV–visible (UV–Vis) diffuse reflectance spectroscopy (DRS), energy-dispersive X-ray spectroscopy (EDX), and scanning electron microscopy (SEM), respectively. The photocatalytic activities of the ternary heterojunctions were evaluated toward the photocatalytic reduction of 4-nitroaniline (4-NA) in aqueous solution. Experimental results reveal that rGO incorporation enhances the activity of the prepared heterojunction photocatalysts, where photocatalyst containing 5% rGO exhibited the highest activity achieving rate of 0.84 min−1. Graphic abstract: [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)997-1009
Number of pages13
JournalPhotochemical and Photobiological Sciences
Volume20
Issue number8
DOIs
Publication statusPublished - Aug 2021

Keywords

  • Band gap
  • Photocatalyst
  • Recombination
  • rGO
  • Simple mixing
  • Visible light

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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