New Journal of Chemistry
Synthesis, characterization, and enhanced photocatalytic properties of NiWO4 nanobricks
Brick shaped nanoparticles of nickel tungstate (NiWO4) were synthesized magnificently using the molten
salts process at 500 1C. Powder X-ray diffraction (PXRD) and electron microscopy measurements were
carried out to investigate the phase purity, crystal structure, and morphology (size and shape) of the
NiWO4 nanobricks (diameters of B20 nm). The BET surface area of the NiWO4 nanobricks was found
to be B25 m2 g1. The optical properties of the NiWO4 nanobricks demonstrate a direct band gap of
2.95 eV. Thereupon, the photocatalytic activities of the NiWO4 nanobricks have been investigated for
the degradation of methylene blue (MB) dye in neutral and basic media under solar light irradiation (SLI).
The NiWO4 nanobricks show significant enhancement in the photo-degradation of MB dye solution in
alkaline (B100% in 50 minutes) and neutral media (B80% in 330 minutes) as compared to bulk NiWO4
and previous reports of metal tungstate. ESI mass spectrometry was also carried out to confirm the
photocatalytic degradation of dye molecules
Brick shaped nanoparticles of nickel tungstate (NiWO4) were synthesized magnificently using the molten
salts process at 500 1C. Powder X-ray diffraction (PXRD) and electron microscopy…
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