Synthesis of Bi2MoO6 and Activating Peroxymonosulfate to Enhance Photocatalytic Activity under Visible Light Irradiation

Abstract Bi 2 MoO 6 nanoflakes are synthesized via a normal hydrothermal method. Bi 2 MoO 6 photocatalysts show lower photocatalytic activity for the degradation of methylene blue under visible light irradiation. In order to further enhance the degradation efficiency, Bi 2 MoO 6 is used to activate the peroxymonosulfate for the degradation of methylene blue under visible light. Bi 2 MoO 6 nanoflakes show excellent degradation efficiency in the Bi 2 MoO 6 /Vis/peroxymonosulfate (PMS) system. Moreover, the influences of PMS dosage, pH value, and inorganic anions on photodegradation are evaluated. The mechanism of activating peroxymonosulfate is proved by radical quenching experiment, which reveals that sulfate radicals govern the removal of methylene blue.