کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
1229921 1495242 2014 6 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Spectroscopic study of the experimental parameters controlling the structural properties of chitosan–Ag nanoparticles composite
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موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Spectroscopic study of the experimental parameters controlling the structural properties of chitosan–Ag nanoparticles composite
چکیده انگلیسی


• Distinct spherical Ag nanoparticles were prepared by chemical reduction method.
• The reduction process and nucleation stage were enhanced by the parameters.
• Nanoparticles shape, size and distribution are influenced by the parameters.

Chitosan as reducing, stabilizing and capping agent was used to synthesize chitosan–silver nanoparticles composite under different experimental conditions of temperature or time. The UV–Vis spectra exhibited a single peak at 430 nm which provided strong evidence for the formation of surface plasmon resonance (SPR) band of Ag nanoparticles. The rate of the increase of this absorbance with temperature increases with increasing the time of reduction. It was found that the variation of the temperature from 60 °C to 100 °C and the time of reduction from 6 h to 16 h resulted in no significant changes in the intensities and positions of the FTIR absorption bands of the composite. The TEM micrographs showed distinct typical spherical silver nanoparticles separated from each other quite well at reduction temperature range (60–80 °C) and displayed some of accumulations at high temperature range (90–100 °C). The TEM micrographs investigation indicated various shapes with different reduction time. The SEM images of the prepared samples were discussed.

UV–Vis absorption spectra of chitosan silver nanoparticles composites as function of reduction temperature for 6 h.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 126, 21 May 2014, Pages 1–6
نویسندگان
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