Effect of Acidic and Basic Conditions on the Plasmon Band of Colloidal Silver
Preparation of colloidal silver nanoparticles has been carried out by salt reduction method and confirmed by the appearance of plasmon band in the visible region. The prepared nanoparticles were subjected to acidic and basic environments. The plasmon band was studied as a function of time under the...
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Walailak University
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doaj-1bf9f558e22c47b4adf69c51dea5ba462020-11-25T01:36:21ZengWalailak UniversityWalailak Journal of Science and Technology1686-39332228-835X2012-03-019310.2004/wjst.v9i3.210225Effect of Acidic and Basic Conditions on the Plasmon Band of Colloidal SilverHafiza S. SHABBEER0Asad Muhammad KHAN1Afzal SHAH2Zia-Ur REHMAN3Syed Mujtaba SHAH4Athar Y. KHAN5Syed Sakhawat SHAH6A-147, Armacost Building Forman Christian College (A Chartered University) Ferozepur Road 54600A-147, Armacost Building Forman Christian College (A Chartered University) Ferozepur Road 54600Department of Chemistry, Quaid-i-Azam University, Islamabad 45320Department of Chemistry, Quaid-i-Azam University, Islamabad 45320Department of Chemistry, Quaid-i-Azam University, Islamabad 45320A-147, Armacost Building Forman Christian College (A Chartered University) Ferozepur Road 54600Vice Chancellor, Hazara University Mansehra Preparation of colloidal silver nanoparticles has been carried out by salt reduction method and confirmed by the appearance of plasmon band in the visible region. The prepared nanoparticles were subjected to acidic and basic environments. The plasmon band was studied as a function of time under the described conditions and hence used as a stability check of silver nanoparticles in different media. The mechanism of plasmon band disappearance of silver colloids was found to depend strongly on the pH of the medium. Graphical abstract Research highlights ► Plasmon band of silver nanoparticles formed by citrate reduction method is strongly affected by the acidic and basic environments demonstrating effect of pH on the structure and stability of citrate caped silver nanoparticles. ► In acidic condition, an accelerated particle growth results only limited by the buffer action of citrate in solution. ► In the case of base Ag+ ions formation take place which ultimately deposit on the walls of test tube forming a silver mirror. http://wjst.wu.ac.th/index.php/wjst/article/view/210Colloidal silverUV-visible spectroscopyacidic and basic conditionsplasmon band |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hafiza S. SHABBEER Asad Muhammad KHAN Afzal SHAH Zia-Ur REHMAN Syed Mujtaba SHAH Athar Y. KHAN Syed Sakhawat SHAH |
spellingShingle |
Hafiza S. SHABBEER Asad Muhammad KHAN Afzal SHAH Zia-Ur REHMAN Syed Mujtaba SHAH Athar Y. KHAN Syed Sakhawat SHAH Effect of Acidic and Basic Conditions on the Plasmon Band of Colloidal Silver Walailak Journal of Science and Technology Colloidal silver UV-visible spectroscopy acidic and basic conditions plasmon band |
author_facet |
Hafiza S. SHABBEER Asad Muhammad KHAN Afzal SHAH Zia-Ur REHMAN Syed Mujtaba SHAH Athar Y. KHAN Syed Sakhawat SHAH |
author_sort |
Hafiza S. SHABBEER |
title |
Effect of Acidic and Basic Conditions on the Plasmon Band of Colloidal Silver |
title_short |
Effect of Acidic and Basic Conditions on the Plasmon Band of Colloidal Silver |
title_full |
Effect of Acidic and Basic Conditions on the Plasmon Band of Colloidal Silver |
title_fullStr |
Effect of Acidic and Basic Conditions on the Plasmon Band of Colloidal Silver |
title_full_unstemmed |
Effect of Acidic and Basic Conditions on the Plasmon Band of Colloidal Silver |
title_sort |
effect of acidic and basic conditions on the plasmon band of colloidal silver |
publisher |
Walailak University |
series |
Walailak Journal of Science and Technology |
issn |
1686-3933 2228-835X |
publishDate |
2012-03-01 |
description |
Preparation of colloidal silver nanoparticles has been carried out by salt reduction method and confirmed by the appearance of plasmon band in the visible region. The prepared nanoparticles were subjected to acidic and basic environments. The plasmon band was studied as a function of time under the described conditions and hence used as a stability check of silver nanoparticles in different media. The mechanism of plasmon band disappearance of silver colloids was found to depend strongly on the pH of the medium.
Graphical abstract
Research highlights
► Plasmon band of silver nanoparticles formed by citrate reduction method is strongly affected by the acidic and basic environments demonstrating effect of pH on the structure and stability of citrate caped silver nanoparticles. ► In acidic condition, an accelerated particle growth results only limited by the buffer action of citrate in solution. ► In the case of base Ag+ ions formation take place which ultimately deposit on the walls of test tube forming a silver mirror.
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topic |
Colloidal silver UV-visible spectroscopy acidic and basic conditions plasmon band |
url |
http://wjst.wu.ac.th/index.php/wjst/article/view/210 |
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