Facile Synthesis and Photocatalytic Performance of W₁₈O₄₉ Nanorods

Abstract:

W₁₈O₄₉ nanorods photocatalyst was successfully synthesized by a facile pyrolyzing ammonium metatungstate in a reductive atmosphere of H₂ (5 vol %)/Ar. The synthesized W₁₈O₄₉ nanorods were characterized by X-ray diffraction (XRD), Raman spectrum, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and ultraviolet-visible (UV-Vis) absorption spectroscopy. The results show that W₁₈O₄₉ nanorods are about 190 nm in diameter and around 4.8 μm in length, and they possess the band-gap energy of 2.32 eV. Moreover the photocatalytic activity of W₁₈O₄₉ nanorods was evaluated by degrading methylene blue (MB) under visible light irradiation. The result illustrates that the W₁₈O₄₉ nanorods have a photodegradation efficiency of 60% for MB under the irradiation of xenon lamp (250 W, λ > 420 nm) for 2 h.

• Periodical: Key Engineering Materials (Volume 726)
• Pages: 360-364
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.726.360
• Online since: January 2017
• Authors: Shuo Wang, Xia Xia Bai, Hui Zhang*
• Keywords: Characterization, Photocatalysis, Synthesis, W₁₈O₄₉ Nanorods

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