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Findings on Nanoparticles Discussed by Investigators at University of Caen (Photochemical Preparation of Silver Nanoparticles Supported on Zeolite...

July 11, 2014



Findings on Nanoparticles Discussed by Investigators at University of Caen (Photochemical Preparation of Silver Nanoparticles Supported on Zeolite Crystals)

By a News Reporter-Staff News Editor at Science Letter -- A new study on Nanoparticles is now available. According to news reporting from Caen, France, by NewsRx journalists, research stated, "A facile and rapid photochemical method for preparing supported silver nanoparticles (Ag-NPs) in a suspension of faujasite type (FAU) zeolite nanocrystals is described. Silver cations are introduced by ion exchange into the zeolite and subsequently irradiated with a Xe-Hg lamp (200 W) in the presence of a photoactive reducing agent (2-hydroxy-2-methylpropiophenone)."

The news correspondents obtained a quote from the research from the University of Caen, "UV-vis characterization indicates that irradiation time and intensity (I-0) influence significantly the amount of silver cations reduced. The full reduction of silver cations takes place after 60 s of a polychromatic irradiation, and a plasmon band of Ag-NPs appears at 380 nm. Transmission electron microscopy combined with theoretical calculation of the plasmon absorbance band using Mie theory shows that the Ag-NPs, stabilized in the micropores and on the external surface of the FAU zeolite nanocrystals, have an almost spheroidal shape with diameters of 0.75 and 1.12 nm, respectively."

According to the news reporters, the research concluded: "Ag-NPs, with a homogeneous distribution of size and morphology, embedded in a suspension of FAU zeolites are very stable (similar to 8 months), even without stabilizers or capping agents."

For more information on this research see: Photochemical Preparation of Silver Nanoparticles Supported on Zeolite Crystals. Langmuir, 2014;30(21):6250-6256. Langmuir can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Langmuir - www.pubs.acs.org/journal/langd5)

Our news journalists report that additional information may be obtained by contacting M. Zaarour, University of Caen, CNRS, ENSICAEN, CIMAP, F-14050 Caen, France. Additional authors for this research include M. El Roz, B.A. Dong, R. Retoux, R. Aad, J. Cardin, C. Dufour, F. Gourbilleau, J.P. Gilson and S. Mintova (see also Nanoparticles).

Keywords for this news article include: Caen, France, Europe, Nanocrystal, Nanotechnology, Emerging Technologies

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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