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室溫制備納米銀醇溶膠
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國(guó)家自然科學(xué)基金（50902054）


Room-Temperature Preparation for Ethanol Colloid of Silver Nanoparticles
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    摘要:

    在室溫下制備了分散性好、穩(wěn)定性好、粒徑分布均勻的高濃度納米銀醇溶膠。采用透射電子顯微鏡（TEM）、紫外可見光譜（UV-Vis）對(duì)產(chǎn)物的形貌和光學(xué)性能進(jìn)行表征。結(jié)果表明，所制備的納米銀為分散均勻的球形粒子，平均粒徑為4.8 nm。在此反應(yīng)過程中，聚乙烯吡咯烷酮（PVP）既作保護(hù)劑又作還原劑，作為溶劑的乙醇有利于PVP分子鏈的舒展，增大了PVP分子與Ag+的接觸幾率，促進(jìn)了還原反應(yīng)的快速進(jìn)行；另一方面，充分舒展的PVP分子能有效抑制銀納米粒子團(tuán)聚

    Abstract:

    Stable concentrated ethanol dispersions of silver nanoparticles with a narrow size distribution were obtained at room temperature. The morphology and optical properties of the silver nanoparticles were characterized by transmission electron microscope (TEM) and visible spectrophotometer (UV-Vis). The results show that the silver particles possess spherical shape with an average diameter of about 4.8 nm with a good dispersion. During the preparation process, poly(vinyl pyrrolidone) (PVP) is used both as a reducing agent and a protecting agent and ethanol is used as a solvent that could rapidly reduce Ag+ in favor of a positively optimum extension of PVP molecule chain which increases the contact chance between PVP and Ag+. Moreover, the PVP molecule of full extension could effectively avoid aggregation of silver nanoparticles

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吳 丹,王 維,邱小林,喬學(xué)亮.室溫制備納米銀醇溶膠[J].稀有金屬材料與工程,2013,42(7):1517~1521.[Wu Dan, Wang Wei, Qiu Xiaolin, Qiao Xueliang. Room-Temperature Preparation for Ethanol Colloid of Silver Nanoparticles[J]. Rare Metal Materials and Engineering,2013,42(7):1517~1521.]
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  • 收稿日期:2012-07-29
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