Highlights

  • BiOBr nanomaterials with varying predominant crystal facets can be synthesized by changing the pH of the solvent medium.

  • The oxygen vacancies and porosity of the nanomaterials depends on the nature of predominant crystal facets.

  • BiOBr nanomaterials with predominantly exposed (001) crystal facet specifically show maximum catalytic activity.

  • Incorporation of Fe ions further improves the catalytic efficiency BiOBr nanomaterials.

https://doi.org/10.1016/j.jallcom.2023.171814