Inderscience Publishers

Visible–light photocatalytic activities of ?VO
3
nanorods and BiVO
4
nanobars

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Monoclinic ?–AgVO
3
nanorods (thickness 30 nm) and monoclinic BiVO
4
nanobars (thickness 15 nm) with high aspect ratio are prepared by controlling the reaction kinetics of room temperature precipitation, without using any capping agents or surfactants. The nanocrystalline vanadates are characterised using XRD, SEM, EDAX, FESEM, TEM and AFM. Possible growth mechanisms of the nanocrystals are explained by the oriented attachment of flocs through an anisotropic growth. Ag nanoparticles are formed in–situ on AgVO
3
nanorods. Using diffuse reflectance spectral analysis the band gaps of ?–AgVO
3
nanorods and BiVO
4
nanobars are calculated and their photocatalytic behaviour is investigated by photodegradation of methylene blue. The ?–AgVO
3
nanorods have higher pore volume compared to BiVO
4
nanobars. The Ag nanoparticles attached on the surface of AgVO
3
nanorods serve as active sites for photocatalysis. Hence silver vanadate nanorods exhibit remarkably enhanced photocatalytic activity and are a good candidate for visible light driven photocatalyst.

Keywords: silver vanadate nanorods, soft chemistry, nanobars, vanadates, band gap, nanotechnology, nanoparticles, photocatalysis, pores

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3
nanorods and BiVO
4
nanobars
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