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Structural and spectroscopic study of Fe-doped TiO2 nanoparticles prepared by solgel method
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نویسنده
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Nasralla N. ,Yeganeh M. ,Astuti Y. ,Piticharoenphun S. ,Shahtahmasebi N. ,Kompany A. ,Karimipour M. ,Mendis B.G. ,Poolton N.R.J. ,S?iller L.
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منبع
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scientia iranica - 2013 - دوره : 20 - شماره : 3 - صفحه:1018 -1022
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چکیده
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5% (molar ratio) fe doped tio2 nanoparticles were prepared by a sol gel method and the postannealing of the samples was carried out at 400 ,c, 600 ,c and 800 ,c in air. structural characterization ofthe samples was carried out using high resolution transmission electron microscopy (hrtem). hrtemimages of the samples revealed that the mean size of the nanoparticles changed from 8 nm to 100 nmas the annealing temperature was increased. experimental investigation of the electronic structure oftio2:fe nanoparticles is important in order to understand the correlation between electronic and opticalproperties in these samples. x-ray photoemission spectroscopy (xps) of the tio2:fe nanoparticles wasperformed to study the electronic structure. the results of xps study confirmed the presence of fe in allsamples, which could not be detected by hrtem and xrd, in spite of low doping levels, and revealed thatfe ions are predominantly in fe3c states. photoluminescence (pl) measurements have been measuredwith an excitation energy of 250 nm to study optical properties of the tio2:fe nanoparticles. the activepl band at 440 nm has been observed.
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کلیدواژه
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Titanium oxide; ,Fe-doping; ,X-ray photoemission spectroscopy; ,Photoluminescence.
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آدرس
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Newcastle University,, Ph D student at Newcastle University, UK, ferdowsi university of mashhad, Ph D degree, ایران, Newcastle University,, pursuing her Ph D degree at Newcastle University, UK , UK, Newcastle University,, studying for his Ph D degree in Chemical Engineering at Newcastle University,, UK, ferdowsi university of mashhad, Head of the Nano Research Centre at Ferdowsi University of Mashhad, ایران, ferdowsi university of mashhad, Full Professor, ایران, ferdowsi university of mashhad, Assistant Professor at Vali-Asr Rafsanjan University,, ایران, Durham University, postdoctoral fellow at Johns Hopkins University, UK, Manchester University,, worked in a number of European institutes,, UK, Newcastle University,, Postdoctoral, UK
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پست الکترونیکی
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lidija.siller@ncl.ac.uk
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Authors
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