Photocatalytic Properties of α-Bi2O3 Nanoneedle Array Synthesized by Hydrothermal Method
Pure α-Bi2O3 with nanoneedle array structure was synthesized directly by hydrothermal method. The optic absorption of the α-Bi2O3 paricles was cut off at ~483 nm and the band gap of the α-Bi2O3 was estimated to be 2.57 eV. The photocatalytic activity of the α-Bi2O3 samples was higher than TiO2 under a visible light irradiation. As a conclusion, relative narrow band gap of α-Bi2O3 nanoneedle array compared to anatase and the special morphology of nanoneedle array structures may improve the photocatalytic activity in visible light irradiation.
Yuan Ming Huang
H.Y. Wang et al., "Photocatalytic Properties of α-Bi2O3 Nanoneedle Array Synthesized by Hydrothermal Method", Solid State Phenomena, Vols. 181-182, pp. 332-335, 2012