Synthesis of silver/montmorillonite nanocomposites using y-irradiation.
Silver nanoparticles (Ag-NPs) were synthesized into the interlamellar space of montmorillonite (MMT) by using the γ-irradiation technique in the absence of any reducing agent or heat treatment. Silver nitrate and γ-irradiation were used as the silver precursor and physical reducing agent in MMT as a...
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| Format: | Article |
| Language: | English |
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Dove Medical Press
2010
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| author | Shameli, Kamyar Ahmad, Mansor Wan Yunus, Wan Md. Zin Ibrahim, Nor Azowa Gharayebi, Yadollah Sedaghat, Sajjad |
| author_facet | Shameli, Kamyar Ahmad, Mansor Wan Yunus, Wan Md. Zin Ibrahim, Nor Azowa Gharayebi, Yadollah Sedaghat, Sajjad |
| author_sort | Shameli, Kamyar |
| collection | UPM |
| description | Silver nanoparticles (Ag-NPs) were synthesized into the interlamellar space of montmorillonite (MMT) by using the γ-irradiation technique in the absence of any reducing agent or heat treatment. Silver nitrate and γ-irradiation were used as the silver precursor and physical reducing agent in MMT as a solid support. The MMT was suspended in the aqueous AgNO3 solution, and after the absorption of silver ions, Ag+ was reduced using the γ-irradiation technique. The properties of Ag/MMT nanocomposites and the diameters of Ag-NPs were studied as a function of γ-irradiation doses. The interlamellar space limited particle growth (d-spacing [ds] = 1.24–1.42 nm); powder X-ray diffraction and transmission electron microscopy (TEM) measurements showed the production of face-centered cubic Ag-NPs with a mean diameter of about 21.57–30.63 nm. Scanning electron microscopy images indicated that there were structure changes between the initial MMT and Ag/MMT nanocomposites under the increased doses of γ-irradiation. Furthermore, energy dispersive X-ray fluorescence spectra for the MMT and Ag/MMT nanocomposites confirmed the presence of elemental compounds in MMT and Ag-NPs. The results from ultraviolet-visible spectroscopy and TEM demonstrated that increasing the γ-irradiation dose enhanced the concentration of Ag-NPs. In addition, the particle size of the Ag-NPs gradually increased from 1 to 20 kGy. When the γ-irradiation dose increased from 20 to 40 kGy, the particle diameters decreased suddenly as a result of the induced fragmentation of Ag-NPs. Thus, Fourier transform infrared spectroscopy suggested that the interactions between Ag-NPs with the surface of MMT were weak due to the presence of van der Waals interactions. The synthesized Ag/MMT suspension was found to be stable over a long period of time (ie, more than 3 months) without any sign of precipitation.
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| first_indexed | 2024-03-06T07:38:56Z |
| format | Article |
| id | upm.eprints-16951 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T07:38:56Z |
| publishDate | 2010 |
| publisher | Dove Medical Press |
| record_format | dspace |
| spelling | upm.eprints-169512012-08-16T01:56:37Z http://psasir.upm.edu.my/id/eprint/16951/ Synthesis of silver/montmorillonite nanocomposites using y-irradiation. Shameli, Kamyar Ahmad, Mansor Wan Yunus, Wan Md. Zin Ibrahim, Nor Azowa Gharayebi, Yadollah Sedaghat, Sajjad Silver nanoparticles (Ag-NPs) were synthesized into the interlamellar space of montmorillonite (MMT) by using the γ-irradiation technique in the absence of any reducing agent or heat treatment. Silver nitrate and γ-irradiation were used as the silver precursor and physical reducing agent in MMT as a solid support. The MMT was suspended in the aqueous AgNO3 solution, and after the absorption of silver ions, Ag+ was reduced using the γ-irradiation technique. The properties of Ag/MMT nanocomposites and the diameters of Ag-NPs were studied as a function of γ-irradiation doses. The interlamellar space limited particle growth (d-spacing [ds] = 1.24–1.42 nm); powder X-ray diffraction and transmission electron microscopy (TEM) measurements showed the production of face-centered cubic Ag-NPs with a mean diameter of about 21.57–30.63 nm. Scanning electron microscopy images indicated that there were structure changes between the initial MMT and Ag/MMT nanocomposites under the increased doses of γ-irradiation. Furthermore, energy dispersive X-ray fluorescence spectra for the MMT and Ag/MMT nanocomposites confirmed the presence of elemental compounds in MMT and Ag-NPs. The results from ultraviolet-visible spectroscopy and TEM demonstrated that increasing the γ-irradiation dose enhanced the concentration of Ag-NPs. In addition, the particle size of the Ag-NPs gradually increased from 1 to 20 kGy. When the γ-irradiation dose increased from 20 to 40 kGy, the particle diameters decreased suddenly as a result of the induced fragmentation of Ag-NPs. Thus, Fourier transform infrared spectroscopy suggested that the interactions between Ag-NPs with the surface of MMT were weak due to the presence of van der Waals interactions. The synthesized Ag/MMT suspension was found to be stable over a long period of time (ie, more than 3 months) without any sign of precipitation. Dove Medical Press 2010 Article PeerReviewed Shameli, Kamyar and Ahmad, Mansor and Wan Yunus, Wan Md. Zin and Ibrahim, Nor Azowa and Gharayebi, Yadollah and Sedaghat, Sajjad (2010) Synthesis of silver/montmorillonite nanocomposites using y-irradiation. International Journal of Nanomedicine, 5. pp. 1067-1077. ISSN 1176-9114 Nanocomposites (Materials) - Synthesis Silver nitrate - Synthesis Irradiation http://dx.doi.org/10.2147/IJN.S15033 English |
| spellingShingle | Nanocomposites (Materials) - Synthesis Silver nitrate - Synthesis Irradiation Shameli, Kamyar Ahmad, Mansor Wan Yunus, Wan Md. Zin Ibrahim, Nor Azowa Gharayebi, Yadollah Sedaghat, Sajjad Synthesis of silver/montmorillonite nanocomposites using y-irradiation. |
| title | Synthesis of silver/montmorillonite nanocomposites using y-irradiation. |
| title_full | Synthesis of silver/montmorillonite nanocomposites using y-irradiation. |
| title_fullStr | Synthesis of silver/montmorillonite nanocomposites using y-irradiation. |
| title_full_unstemmed | Synthesis of silver/montmorillonite nanocomposites using y-irradiation. |
| title_short | Synthesis of silver/montmorillonite nanocomposites using y-irradiation. |
| title_sort | synthesis of silver montmorillonite nanocomposites using y irradiation |
| topic | Nanocomposites (Materials) - Synthesis Silver nitrate - Synthesis Irradiation |
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