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Biomediated silver nanoparticles for the highly selective copper (II) ion sensor applications / C. Joseph Kirubaharan in Industrial & engineering chemistry research, Vol. 51 N° 21 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 21 (Mai 2012) . - pp. 7441–7446 Titre : Biomediated silver nanoparticles for the highly selective copper (II) ion sensor applications Type de document : texte imprimé Auteurs : C. Joseph Kirubaharan, Auteur ; D. Kalpana, Auteur ; Yang Soo Lee, Auteur Année de publication : 2012 Article en page(s) : pp. 7441–7446 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Silver  nanoparticles Résumé : Nanoparticles synthesis is an evergreen research field of 21st century in which the connotation of the biomediated experimental process is highly imperative. Biomediated silver nanoparticles were synthesized with the aid of an eco-friendly biomaterial, namely, aqueous Azadirachta indica extract. The effect of pH and temperature on the formation of silver nanoparticles was analyzed. Formation of the silver nanoparticles was verified by surface plasmon spectra using a UV–vis spectrophotometer. Morphology and crystalline structure of the prepared silver nanoparticles were characterized by TEM and XRD techniques, respectively. Furthermore, the biomediated silver nanoparticles without any surface modification were used for the heavy metal ion sensors in aqueous media. The prepared silver nanoparticles were successful in detecting even the minimal amount of heavy metal copper(II) ion and exhibited excellent specific metal ion selectivity. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3003232 [article] Biomediated silver nanoparticles for the highly selective copper (II) ion sensor applications [texte imprimé] / C. Joseph Kirubaharan, Auteur ; D. Kalpana, Auteur ; Yang Soo Lee, Auteur . - 2012 . - pp. 7441–7446. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 21 (Mai 2012) . - pp. 7441–7446 Mots-clés : Silver  nanoparticles Résumé : Nanoparticles synthesis is an evergreen research field of 21st century in which the connotation of the biomediated experimental process is highly imperative. Biomediated silver nanoparticles were synthesized with the aid of an eco-friendly biomaterial, namely, aqueous Azadirachta indica extract. The effect of pH and temperature on the formation of silver nanoparticles was analyzed. Formation of the silver nanoparticles was verified by surface plasmon spectra using a UV–vis spectrophotometer. Morphology and crystalline structure of the prepared silver nanoparticles were characterized by TEM and XRD techniques, respectively. Furthermore, the biomediated silver nanoparticles without any surface modification were used for the heavy metal ion sensors in aqueous media. The prepared silver nanoparticles were successful in detecting even the minimal amount of heavy metal copper(II) ion and exhibited excellent specific metal ion selectivity. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3003232

Catalytic activity of green and recyclable nanometric tin oxide-doped silica nanospheres in the synthesis of imines / G. Gnana kumar in Industrial & engineering chemistry research, Vol. 51 N° 48 (Décembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 48 (Décembre 2012) . - pp. 15626–15632 Titre : Catalytic activity of green and recyclable nanometric tin oxide-doped silica nanospheres in the synthesis of imines Type de document : texte imprimé Auteurs : G. Gnana kumar, Auteur ; C. Joseph Kirubaharan, Auteur ; Ae Rhan Kim, Auteur Année de publication : 2013 Article en page(s) : pp. 15626–15632 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Nanometric  Silica  Nanospheres Résumé : Nanometric tin oxide particles were effectively doped over silica nanospheres without any free zones via sol–gel technique in an aqueous medium. X-ray diffraction pattern of the prepared composite specifies the formation of amorphous and cassiterite character of the silica and tin oxide particles, respectively. High thermal stability of the prepared materials substantiated ceramic properties of the prepared nanomaterials and has an influence on decreasing the reaction temperature of organic reactions. High surface area associated with prompt porosity values and their solubility in variety of solvents favors the catalytic activity of the prepared nanomaterials in imine formation reactions. The ease of recovery, excellent product yield, and intrinsic stability of the catalyst make this protocol economical and sustainable. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie302301p [article] Catalytic activity of green and recyclable nanometric tin oxide-doped silica nanospheres in the synthesis of imines [texte imprimé] / G. Gnana kumar, Auteur ; C. Joseph Kirubaharan, Auteur ; Ae Rhan Kim, Auteur . - 2013 . - pp. 15626–15632. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 48 (Décembre 2012) . - pp. 15626–15632 Mots-clés : Nanometric  Silica  Nanospheres Résumé : Nanometric tin oxide particles were effectively doped over silica nanospheres without any free zones via sol–gel technique in an aqueous medium. X-ray diffraction pattern of the prepared composite specifies the formation of amorphous and cassiterite character of the silica and tin oxide particles, respectively. High thermal stability of the prepared materials substantiated ceramic properties of the prepared nanomaterials and has an influence on decreasing the reaction temperature of organic reactions. High surface area associated with prompt porosity values and their solubility in variety of solvents favors the catalytic activity of the prepared nanomaterials in imine formation reactions. The ease of recovery, excellent product yield, and intrinsic stability of the catalyst make this protocol economical and sustainable. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie302301p