pH Dependent Synthesis And Characterization of Bismuth Molybdate Nanostructure for Photocatalysis Degradation of Organic Pollutants

Bismuth Molybdate nanostructures were synthesized using a simple hydrothermal method at varied pH (2,4,6,8, and 10) for 15 h at 180°. The results show that the pH precursor solutions have a significant impact on the morphology, phase formations and photocatalytic activity. The FESEM observations and XRD analysis, at low PH level, Bi2MoO6 nanoplates have formed while gradually convert to Bi2MoO6 spherical nanoparticle at high PH level. The optical absorption study demonstrated that Bi2MoO6 nanoplates absorbed visible light, but that there was a blue shift when compared to the cubic Bi4MoO9 structures. Photocatalytic activity revealed that nanoplates in pH = 4 sample has excellent photocatalytic activity for degradation of rhodamine (RhB), methylene orange (MO) and phenol under visible- light irradiation (λ > 400 nm). The most important point is photodegradation 90% of phenol within 300 min.