کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9676030 1454112 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of silver nanoparticles by chemical reduction method
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Preparation of silver nanoparticles by chemical reduction method
چکیده انگلیسی
In the solution containing polyvinyl pyrrolidone (PVP), silver nitrate was reduced by the glucose, and silver particles were generated. The possible reaction process is discussed in this paper. Sodium hydroxide was used to enhance the reaction velocity. When the mole ratio of NaOH to AgNO3 was ranged from 1.4 to 1.6, the colloid kept stable and no Ag+ was traced. The particles and colloids were also analyzed by the X-ray diffraction (XRD), transmission electron microscopy (TEM) and UV-visible (UV-vis) spectrophotometer. The TEM photo indicated that with the increase in PVP, the particles dispersed better; and if the weight ratio of PVP to AgNO3 is no less than 1.5, the particles dispersed individually in a colloid form. The agglomeration of particles also was influenced by the mixing speed of the reactants. The XRD spectrums showed that the particles were silver simple substance if the reductant was sufficient and the mixing speed of the reactants was slow enough.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 256, Issues 2–3, 22 April 2005, Pages 111-115
نویسندگان
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