Incorporation of 12-Tungstophosphoric acid in Titania spheres and fabrication of core-shell Polyoxotungstate/Titania nanostructures

Document Type : Reasearch Paper

Authors

• M. Seyedsadjadi ¹
• S. Rashidzadeh ²
• N. Farhadyar ³

¹ Department of chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran

² Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran

³ Department of Chemistry, Varamin –Pishva Branch, Islamic Azad University, Varamin, Iran

10.7508/ijnd.2014.02.002

Abstract

Core-shell 12-tungstophosphoric acid/TiO₂ (HPW/TiO₂) nanoparticles at 10 and 20% of HPW have been synthesized by simple in-situ sol- gel method. Characterization of the samples was carried out by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Fourier transform infrared (FTIR). The X-ray diffraction patterns of as prepared solid samples, indicated characteristic peaks of titania with additional peaks concerning to HPW in a very low intensities. This result in addition to the FTIR and SEM - EDX analysis data confirmed incorporation of HPW / TiO₂ nanostructure in spherical morphology with a particle size of around 25 nm.

Keywords

• Polyoxometalates
• Phosphotungstic acid
• Keggin type structure
• Inorganic-inorganic nanostructure
• Titania phase

20.1001.1.20088868.2014.5.2.2.0

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