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

Fontes Garcia AM, Fernandes MS, Coutinho PJ - Nanoscale Res Lett (2011)

Bottom Line: 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.

View Article: PubMed Central - HTML - PubMed

Affiliation: Centre of Physics (CFUM), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal. pcoutinho@fisica.uminho.pt.

ABSTRACT
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.

No MeSH data available.


Related in: MedlinePlus

PL of CdSe QDs under an UV lamp.
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Figure 1: PL of CdSe QDs under an UV lamp.

Mentions: The second microemulsion is added drop by drop to the first one with vortexing. The resulting solution is apparently colourless. After heating at 80°C for 1 h an orange-like colour appears that corresponds to the formation of CdSe QDs. The PL is seen with naked eye using an UV lamp in a dark room (see Figure 1).


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

Fontes Garcia AM, Fernandes MS, Coutinho PJ - Nanoscale Res Lett (2011)

PL of CdSe QDs under an UV lamp.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211843&req=5

Figure 1: PL of CdSe QDs under an UV lamp.
Mentions: The second microemulsion is added drop by drop to the first one with vortexing. The resulting solution is apparently colourless. After heating at 80°C for 1 h an orange-like colour appears that corresponds to the formation of CdSe QDs. The PL is seen with naked eye using an UV lamp in a dark room (see Figure 1).

Bottom Line: 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.

View Article: PubMed Central - HTML - PubMed

Affiliation: Centre of Physics (CFUM), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal. pcoutinho@fisica.uminho.pt.

ABSTRACT
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.

No MeSH data available.


Related in: MedlinePlus