The hetrostructure BiVO4 nanoparticle was synthesized via microwave method using domestic microwave oven for the application ofenvironmental remediation. The crystallinity and morphology of the material were analysed by X-ray diffraction (XRD), Raman spectroscopy, scanning and transmission electron microscopy (SEM and TEM) and UV–visible - diffuse reflectance spectroscopy (UV-vis - DRS). The XRD pattern revealed that co-existence of monoclinic-tetragonal BiVO4(m-t BiVO4) nanostructure with the crystalline size of 8 nm. The SEM and TEM images exposed the m-t BiVO4material is in discoid shape. The DRS of BiVO4exhibits the visible region absorption with narrow band gap 2.4 eV. The photocatalytic activities of the catalysts were evaluated by the degradation of Rhodamine B (RhB) under visible light irradiation. The improved photocatalytic of the m-t BiVO4 nanostructure is due to related to the smaller band gap, mixed phase and nano size entities.
Key words: Semiconductor, Heat treatment, Electron microscopy, hetrostructure,