Elemental Bromine Production by TiO₂ Photocatalysis and/or Ozonation

Abstract

Significant production of elemental bromine (Br 2 ) was observed for the first time when treating bromide containing solutions at acidic pH, with TiO 2 photocatalyst, ozone,o racombination thereof.B r 2 selectivities up to approximately 85 %w ere obtained and the corresponding bromine mass balance values satisfied. The process is general and may be applied at alaboratory scale for green bromination reactions,orindustrially as acheap,safe,and environmentally sustainable alternative to the currently applied bromine production methods.