book of abstracts - IM2NP

A B S T R A C T S WEDNESDAY, JUNE 30 N A N O S E A 2 0 1 0
11H20-11H40
Preparation of nanosize ZnO on the hollow silica matrix and study of it’s
photocalytic activity.
1 N. Farhadyar*, 2 M. S. Sadjadi (1) Department of Chemistry, Faculty of Basic Sciences,varamin –pishva
Branch , Islamic Azad University,Iran, 2)Department of Chemistry, Faculty of Basic Sciences, Sciences and
Research Campus, Islamic Azad University, Tehran Iran) nfarhadyar@gmail.com
High efficiency of photocatalystic reaction has achieved by increasing the surface area of the support of the
photocatalyst nanosize materials. Therefore, controlling of the crystalline size of the support materials is very
crucial to monitor adequately the catalytic activity or enhancement of the photocatalytic activity on the
hollow materials. It seems to be attractive in use of nanosized ZnO on the hollow silica.
In this work, nanosized ZnO on the hollow silica was prepared from precursors zinc acetate as zinc source
and loaded on the hollow silica by using tetraethoxysilane. As prepared material, nanosized ZnO on the
hollow silica was investigated by using X-ray diffraction (XRD), Transmission electron microscopy (TEM),
Fourier transform infrared spectroscopy (FT- IR). Photocatalytic activity of the samples, of nanosized ZnO
on the hollow silica were finally evaluated by degrading of the methyl orange under irradiation of UV light.
The results showed that the nanosized of nanosized ZnO on the hollow silica enhances the photocatalytic
activity of ZnO when loaded on Hollow silica.
11H40-12H00
Liquid Crystalline-ZnO Nanoparticle Hybrids.
S. Saliba,a,b J.-D. Marty,a M. L. Kahn,b Y. Coppel,b C. Mingotaud,a B. Chaudret b
(a University of Toulouse, UPS, Bat 2R1, 118 route de Narbonne, 31062 Toulouse ; b Laboratoire de Chimie de
Coordination; CNRS UPR 8241, 205 route de Narbonne, 31077 Toulouse)
1 – Introduction
ZnO is a well known wide-gap semiconductor with a band-gap value of 3.37 eV displaying luminescent
properties in the near UV and visible regions of the spectrum.1 Such nanoparticles (Nps) are highly
interesting in the manufacture of electronic and photonic devices.2,3 Combining ZnO Nps and liquid crystals
(LCs) may lead to new hybrids with unique properties and controlled organization. To elaborate such
materials two strategies can be envisaged; a) mixing preformed ZnO Nps with a compatible LC and b) the
in-situ growth of Nps inside the liquid crystalline host. We have developed both strategies using the
thermotropic liquid crystal 4‟-(6-aminohexyloxy) biphenyl-4-carbonitrile (6OCBNH2) as host and obtained
new organic/inorganic organized materials.
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