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CdSe/TiO2 core-shell nanoparticles produced in AOT reverse micelles: applications in pollutant photodegradation using visible light

Arlindo M Fontes Garcia, Marisa SF Fernandes and Paulo JG Coutinho*

Author affiliations

Centre of Physics (CFUM), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal

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Citation and License

Nanoscale Research Letters 2011, 6:426  doi:10.1186/1556-276X-6-426

Published: 15 June 2011


CdSe quantum dots with a prominent band-edge photoluminescence were obtained by a soft AOT water-in-oil (w/o) microemulsion templating method with an estimated size of 2.7 nm. The CdSe particles were covered with a TiO2 layer using an intermediate SiO2 coupling reagent by a sol-gel process. The resulting CdSe/TiO2 core/shell nanoparticles showed appreciable photocatalytic activity at λ = 405 nm which can only originate because of electron injection from the conduction band of CdSe to that of TiO2.