VISIBLE-LIGHT PHOTOCATALYTIC REMOVAL OF RHODAMINE B FROM WATER OVER TIO2@GRAPHENE OXIDE NANOCOMPOSITE

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GHAVAMI M.; KASSAEE M.Z.

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Seminar Paper

Paper Information

Seminar: SEMINAR OF CHEMISTRY AND ENVIRONMENT
Year:2013 | Issue:6

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Title

VISIBLE-LIGHT PHOTOCATALYTIC REMOVAL OF RHODAMINE B FROM WATER OVER TIO2@GRAPHENE OXIDE NANOCOMPOSITE

Author(s)

GHAVAMI M. | KASSAEE M.Z. | Issue Writer Certificate

Keywords

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Abstract

RECENTLY, GRAPHENE-BASED SEMICONDUCTOR PHOTOCATALYSTS HAVE ATTRACTED MORE ATTENTION BECAUSE OF THEIR ENHANCED PHOTOCATALYTIC ACTIVITY. IN THIS WORK, TIO2@GRAPHENE OXIDE COMPOSITE IS PREPARED BY A FACILE SOL GEL METHOD USING TETRABUTYL ORTHOTITANATE (TBOT) AS THE TI SOURCE. TAKING ADVANTAGES OF GRAPHENE OXIDE AND TIO2, THE CATALYST EXHIBITED STRONG LIGHT ABSORPTION IN THE VISIBLE REGION, RESULTING IN ALMOST 100% PHOTOCATALYTIC REMOVAL EFFICIENCY OF RHODAMINE B FROM WATER UNDER SIMULATED SOLAR LIGHT IRRADIATION, FAR HIGHER THAN 13% ON TIO2 NANOPARTICLES. THE ENHANCEMENT IN THE PHOTOCATALYTIC ACTIVITY IS ATTRIBUTED TO THE SYNERGETIC EFFECT BETWEEN GRAPHENE OXIDE AND TIO2 NANOPARTICLES. OTHER THAN THE GRAPHENE OXIDE AS AN EXCELLENT ELECTRON ACCEPTOR AND TRANSPORTER, THE ENHANCED PHOTOCATALYTIC ACTIVITY IS CAUSED BY INTERFACIAL CHARGE TRANSFER, WHICH MARKEDLY DECREASED THE RECOMBINATION OF ELECTRON-HOLE PAIRS. THIS WORK CAN PROVIDE NEW INSIGHTS FOR DIRECTING THE DESIGN OF NEW HETEROGENEOUS PHOTOCATALYSTS, WHICH CAN BE APPLIED IN ENVIRONMENTAL PROTECTION.

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