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PHOTOCATALYTIC ACTIVITY OFAg,Au-DEPOSITEDTiO2NANOPARTICLES PREPARED BY SONOCHEMICAL REDUCTION METHOD

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  • DANIEL YANG

    (Department of Chemical and Bioengineering, Kyungwon University, San 64 Bokjeomg-dong, Soojung-gu, Seongnam, Gyeonggi-do, South Korea)

  • SANG-WHA LEE

    (Department of Chemical and Bioengineering, Kyungwon University, San 64 Bokjeomg-dong, Soojung-gu, Seongnam, Gyeonggi-do, South Korea)

Abstract

The photocatalytic activity of metal-depositedTiO2was investigated with different surface coverage of nanosized noble metals (AgandAu). The sonochemical deposition of nanosized metals on theTiO2matrix was prepared by adjusting the loading volumes of silver and gold precursors in an ultrasound-driven cell. Non-annealedAg-TiO2exhibited the maximal activity in the optimal loading ranges of silver precursor (e.g. 0.2–0.3 ml of 1.0 wt.%AgNO3), displaying the enhanced efficiency of electron–hole separation. The addition of nanosizedAuonAg-TiO2proved to be undesirable to improve the photocatalytic activity ofAu/Ag-TiO2, except for the excessive loading of metal precursors (0.3 ml of 1.0 wt.%AgNO3+ 0.2mlof 1.0 wt.%HAuCl4). XRD and XPS analysis confirmed the co-existence ofAgandAuspecies, and the reduction of PL (photoluminescence) intensity indicated the efficient separation of electron–hole pairs for optimal doping of nanosized metals on theTiO2matrix.

Suggested Citation

  • Daniel Yang & Sang-Wha Lee, 2010. "PHOTOCATALYTIC ACTIVITY OFAg,Au-DEPOSITEDTiO2NANOPARTICLES PREPARED BY SONOCHEMICAL REDUCTION METHOD," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 17(01), pages 21-26.
    • Handle: RePEc:wsi:srlxxx:v:17:y:2010:i:01:n:s0218625x10013588
    DOI: 10.1142/S0218625X10013588
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    Keywords

    Ag/Au; sonochemical deposition; TiO2; photocatalytic;
    All these keywords.

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