β-Ga2O3 nanostructures for photocatalytic degradation of red amaranth toxic dye

Abstract

Beta gallium oxide (β-Ga2O3) microstructures composed of ~50 nm nanoparticles were synthesized by the hydrothermal method. Using the Tauc plot method a value of ~4.9 eV was obtained for the optical band gap of β-Ga2O3. TEM and XRD analyses revealed high crystallinity of the β-phase of gallium oxide nanostructures. The synthesized material showed high photocatalytic efficiency. The degradation of red amaranth and rhodamine B toxic dyes under UV light irradiation reached 97% and 100% after 165 and 120 min, respectively.