Silver doping on TiO2 nanoparticles using a sacrificial acid and its photocatalytic performance under medium pressure mercury UV lamp / E. Pipelzadeh in Chemical engineering journal, Vol. 155 N° 3 (Decembre 2009)  

Public ISBD [article]  inChemical engineering journal > Vol. 155 N° 3 (Decembre 2009) . - pp. 660-665 Titre : Silver doping on TiO2 nanoparticles using a sacrificial acid and its photocatalytic performance under medium pressure mercury UV lamp Type de document : texte imprimé Auteurs : E. Pipelzadeh, Auteur ; A. A. Babaluo, Auteur ; M. Haghighi, Auteur Année de publication : 2010 Article en page(s) : pp. 660-665 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Nanocomposite TiO2 Ag Calcination Photocatalytic activity UV lamp Index. décimale : 660 Résumé : Titanium dioxide nanoparticles were modified using a sacrificial organic acid carrier at low pH values where the zeta potential of the TiO2 nanoparticles was found to be highly effective forming 0.05, 0.1, 0.5 wt.% Ag/TiO2 nanocomposites. The organic carrier was acting both as an Ag ion carrier and a hole scavenger enhancing the photodeposition of Ag atoms. The formed nanocomposites were calcined at 300 and 400 °C under controlled atmosphere and later examined for photocatalytic performance using a 125 medium pressure mercury lamp decomposing formic acid as an organic pollutant. Morphological, crystallographical and UV–vis spectroscopy analyses were used to characterize the synthesized nanocomposites. The studies have revealed that non-calcined 0.5 wt.% Ag/TiO2 nanocomposite has the best photocatalytic activity compared with other synthesized nanocomposites and that of the non-modified TiO2 (P25). Further calcination of the synthesized nanocomposites has shown to be effective in lower Ag concentrations where 0.1 wt.% Ag/TiO2 nanocomposite has the best photocatalytic activity at the 400 °C. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4X49YKT-5&_user=6 [...] [article] Silver doping on TiO2 nanoparticles using a sacrificial acid and its photocatalytic performance under medium pressure mercury UV lamp [texte imprimé] / E. Pipelzadeh, Auteur ; A. A. Babaluo, Auteur ; M. Haghighi, Auteur . - 2010 . - pp. 660-665. Génie Chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 155 N° 3 (Decembre 2009) . - pp. 660-665 Mots-clés : Nanocomposite TiO2 Ag Calcination Photocatalytic activity UV lamp Index. décimale : 660 Résumé : Titanium dioxide nanoparticles were modified using a sacrificial organic acid carrier at low pH values where the zeta potential of the TiO2 nanoparticles was found to be highly effective forming 0.05, 0.1, 0.5 wt.% Ag/TiO2 nanocomposites. The organic carrier was acting both as an Ag ion carrier and a hole scavenger enhancing the photodeposition of Ag atoms. The formed nanocomposites were calcined at 300 and 400 °C under controlled atmosphere and later examined for photocatalytic performance using a 125 medium pressure mercury lamp decomposing formic acid as an organic pollutant. Morphological, crystallographical and UV–vis spectroscopy analyses were used to characterize the synthesized nanocomposites. The studies have revealed that non-calcined 0.5 wt.% Ag/TiO2 nanocomposite has the best photocatalytic activity compared with other synthesized nanocomposites and that of the non-modified TiO2 (P25). Further calcination of the synthesized nanocomposites has shown to be effective in lower Ag concentrations where 0.1 wt.% Ag/TiO2 nanocomposite has the best photocatalytic activity at the 400 °C. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4X49YKT-5&_user=6 [...]

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