Hydrothermal preparation of B-TiO2-graphene oxide ternary nanocomposite, characterization and photocatalytic degradation of bisphenol A under simulated solar irradiation


ALTIN İ. , Ma X., Boffa V., BACAKSIZ E. , Magnacca G.

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING, vol.123, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 123
  • Publication Date: 2021
  • Doi Number: 10.1016/j.mssp.2020.105591
  • Title of Journal : MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
  • Keywords: Graphene oxide, Boron doped TiO2, Solar induced photocatalysis, Solar simulator, Endocrine disrupting chemical, REDUCED GRAPHENE OXIDE, WASTE-WATER, DOPED GRAPHENE, TIO2 NANOTUBES, MECHANISM, REMOVAL, NANOPARTICLES, NITROGEN, SEMICONDUCTOR, PERFORMANCE

Abstract

Boron-doped TiO2 decorated on graphene oxide photocatalysts (denoted as GO@B-TiO2) were prepared for the effective photocatalytic treatment of bisphenol A (BPA) from water under simulated solar light. To prepare GO@B-TiO2 nanocomposites, B-TiO2 was initially synthesized via a sol-gel procedure and subsequently decorated on graphene oxide at 70 degrees C, by a facile hydrothermal method. Characterization results show that B-TiO2 particles are anchored on the surface of graphene oxide successfully. Their photocatalytic efficiency could also be adjusted by changing the ratios between B-TiO2 and GO. The optimum GO loading is 2 wt%, at which GO@B-TiO2 nanocomposite photocatalyst could achieve the best BPA degradation percentage of 47.66% compared with B-TiO2 materials (18.78%) after 240 min of solar irradiation. The dominant reactive oxygen species (ROS) formed during the photocatalytic abatement of BPA were determined to be O-2(center dot-) and (OH)-O-center dot. The presence of carbonate and chloride induced moderate inhibitory effect on GO@B-TiO2 (2 wt% GO), while bicarbonate and nitrate displayed only minor effect towards photocatalytic degradation of BPA. Based on these results, the as-prepared nanocomposites may be used as efficient and promising photocatalysts in secondary treatments to degrade recalcitrant contaminants in water exploiting the visible-light region of the full solar spectrum.