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  • Title: Photocatalytic activity of TiO₂ nanoparticles synthesized in presence of ammonium hexafluorosilicate.
    Author: Seyghali B, Zanjanchi MA.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2015 Dec 05; 151():104-10. PubMed ID: 26125990.
    Abstract:
    A series of silicon incorporated TiO2 with anatase crystalline phase were prepared via sol-gel using ammonium hexafluorosilicate (AHFS). The synthesized products were characterized using X-ray diffraction, FTIR, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), UV-vis diffuse reflectance spectrophotometry (DRS), energy dispersive X-ray analysis (EDX) and BET surface area measurement. Presence of Si-O-Ti bonds is revealed based on the XPS results. The products were tested for their activity as photocatalysts for degradation of congo red as a prob molecule. The 20% AHFS incorporation displayed the highest photocatalytic activity. This adequate amount of AHFS was beneficial for transferring photogenerated electron and reducing the recombination of electron-holes.
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