β-Bi2O3semiconductor nanoparticles synthesized by solution combustion method. The as-synthesized sample was systematically characterized by several techniques, including PXRD, DLS, Raman spectrometry, SEM, and DRS-UV-vis spectroscopy. PXRD and Raman analyses confirmed high crystallinity and phase purity of the prepared β-Bi2O3. SEM and DLS showed the morphology and the agglomeration of β-Bi2O3nanoparticles.DRS-UV-Vis showed the enhanced visible light absorption toward the visible light range with bandgap 2.43 eV. Significantly, β-Bi2O3 nanoparticles demonstrated outstanding visible-light photocatalytic properties, revealed enhanced methylene blue (MB) dye degradation. 91% of the dye content was degraded by 30 minutes under 50W visible LED light irradiation, which could be attributed to enhanced visible light absorption and the smaller size of the synthesized nanoparticles.
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