Abstract
Tungsten trioxide (WO[Formula: see text] nanostructures were synthesized by a simple hydrothermal method. The morphology of WO3 nanostructures can be varied by adding inorganic ions from alkali metal salts. The effect of inorganic ions on the microstructure and visible-light-driven photocatalytic activity was characterized via X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and UV-vis spectroscopy. Methylene blue (MB) photodegradation experiments showed that the one-dimensional (1D) WO3 nanorods prepared by the aid of potassium sulfate exhibited the highest photocatalytic efficiency (96.4% in 2.5 h) under visible light irradiation. It is deduced that the excellent photocatalytic property of 1D WO3 nanorods was mainly attributed to the efficient charge transfer capability, which is promising for practical applications in environmental remediation.
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