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Characterization of TiO2 Modified with Bimetallic Ag/Au Nanoparticles Obtained inMicroemulsion System

  • Anna Gołąbiewska , Anna Zielińska-Jurek EMAIL logo and Adriana Zaleska
Published/Copyright: November 30, 2016
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Abstract

Titanium dioxide modified with silver-gold bimetallic nanoparticles were prepared by simultaneously formation of Ag/Au and TiO2 nanoparticles in water-in-oil microemulsion system (water/AOT/cyclohexane). Silver nitrate (AgNO3) and tetrachloroauric(III) acid (HAuCl4) were taken as the precursors and sodium borohydride (NaBH4) was used as a reducing agent. The photocatalysts samples were characterized by X-ray powder diffraction (XRD), BET surface area measurements, scanning electron microscopy (SEM) and energy dispersive spectroscopy analysis (EDS). The photocatalytic activity of bimetallic nanoparticles deposited at the TIP-TiO2 surface under visible light irradiation was estimated by measuring the decomposition rate of phenol in aqueous solution. The highest photocatalytic activity was obtained for the photocatalyst containing 1.5 mol % of silver and 0.5 mol % of gold.

Received: 2011-9-29
Revised: 2011-11-12
Accepted: 2011-11-15
Published Online: 2016-11-30
Published in Print: 2012-1-1

© 2016 by Walter de Gruyter Berlin/Boston

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