Sol‐Gel Synthesis and Photocatalytic Study of Visible Light Active N‐Doped KSbWO6 |
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Authors: | J R Reddy G Ravi Naveen Kumar Veldurthi Radha Velchuri Someshwar Pola Muga Vithal B Sreedhar |
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Institution: | 1. Department of Chemistry, Osmania University, Hyderabad – 500 007, India;2. Inorganic and Physical Chemistry Division, Indian Institute of Chemical Technology, Hyderabad 500 007, India |
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Abstract: | KSbWO6 was prepared by sol‐gel method. N‐doped KSbWO6 (KSbWO6–xNx) was obtained by heating KSbWO6 and urea at 400 °C. Both the compounds are characterized by powder X‐ray diffraction (XRD), TEM, SEM‐EDS, X‐ray photo electronic spectroscopy (XPS), and UV/Vis diffuse reflectance spectroscopy (UV‐DRS). A shift in the peak positions of powder XRD and XPS spectra was observed. The band gap energy (Eg) of KSbWO6 and N‐doped KSbWO6 was obtained from their diffused reflectance spectra.Eg was reduced from 3.17 eV to 2.56 eV upon nitrogen doping in KSbWO6. The reduction of the Eg is attributed to the lifting of valence band of N‐doped KSbWO6, due to the mixing of O 2p states with N 2p states. The photocatalytic activity of both the samples was studied by degradation of methylene blue (MB). The nitrogen doped KSbWO6 shows higher photocatalytic activity compared to that of KSbWO6. |
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Keywords: | Sol‐gel synthesis Doping X‐ray photo electronic spectroscopy Photocatalytic activity Electronic spectroscopy |
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