室温电子还原制备金纳米颗粒与琼脂糖复合膜的表征与应用

发布时间：2018-03-24 20:47

本文选题：电子还原　切入点：复合膜　出处：《物理化学学报》2017年02期

【摘要】：利用室温电子还原技术合成了一种金纳米颗粒与琼脂糖复合膜。合成过程采用氩气辉光放电为廉价电子源,方便快捷,绿色环保。通过紫外-可见(UV-Vis)分光光度计、透射电子显微镜(TEM)、扫描电子显微镜(SEM)、X射线衍射(XRD)仪、光电子能谱(XPS)等表征,发现可以通过改变氯金酸浓度调控复合膜中金纳米颗粒的分布,加入聚乙烯吡咯烷酮(PVP)可有效控制金纳米颗粒的形貌。由于复合膜具有金纳米颗粒密集排布的结构,可作为表面增强拉曼散射(SERS)活性基底。实验表明,以对氨基苯硫酚为探针,该复合膜作为SERS基底,SERS平均增强因子超过了106,检测限达到了10-12mol?L-1。除此之外,作为SERS基底,复合膜具有良好的均一性和稳定性。
[Abstract]:A composite film of gold nanoparticles and agarose was synthesized by electron reduction technique at room temperature. Argon glow discharge was used as a cheap electron source in the synthesis process. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), photoelectron spectroscopy (XPS) and other characterizations have shown that the distribution of gold nanoparticles in the composite films can be controlled by changing the concentration of chlorau acid. The morphology of gold nanoparticles can be effectively controlled by adding polyvinylpyrrolidone (PVP). Because the composite film has a dense arrangement of gold nanoparticles, it can be used as a surface enhanced Raman scattering (SERS) active substrate. The experimental results show that p-aminophenol is used as a probe. The average enhancement factor of the composite membrane for SERS substrate is over 106, and the detection limit is 10-12 mol? In addition, as a SERS substrate, the composite film has good homogeneity and stability.
【作者单位】：天津大学化工学院天津化学化工协同创新中心;
【基金】：国家自然科学基金(21476157)资助项目~~
【分类号】：TB383.2;O657.37

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