植物还原法制备Au-Ag合金纳米材料及其拉曼应用
发布时间：2019-05-19 10:33
【摘要】：以菠萝蜜叶提取液作为保护剂和还原剂制备金银合金纳米颗粒,在333 K和363 K时制备的合金纳米颗粒的金与银的组成比分别约为3:1和1:1。采用紫外-可见分光光度法分别测定金与银纳米颗粒的成核生长动力学,温度对银的成核生长影响更加明显,在363 K时两者成核生长速度相差不到2倍,容易形成比例相当的合金纳米颗粒。对提取液中植物分子反应前后红外分析,得出333 K时有部分银离子没有完全还原而使得合金中相应含量比例较低。而组成约为1:1的合金纳米颗粒在罗丹明的检测中显示出较强的拉曼增强效应。
[Abstract]:Gold and silver alloy nanoparticles were prepared by using pineapple leaves extract as protective agent and reductant. The composition ratios of gold to silver were about 3:1 and 1 脳 1 at 333 K and 363 K, respectively. The nucleation and growth kinetics of gold and silver nanoparticles were determined by UV-vis spectrophotometry. The effect of temperature on the nucleation growth of silver was more obvious, and the difference of nucleation growth rate between gold and silver nanoparticles was less than 2 times at 363 K. It is easy to form alloy nanoparticles with the same proportion. By infrared analysis before and after the reaction of plant molecules in the extract, it was found that some silver ions were not completely reduced at 333 K, so that the corresponding content of the alloy was lower. The alloy nanoparticles with a composition of about 1:1 showed a strong Raman enhancement effect in the detection of Rhodamine.
【作者单位】： 南昌工程学院理学院;
【基金】：国家自然科学基金项目(51303074,21506088) 江西省自然科学基金项目(20161BBF60061)~~
【分类号】：TG146.31;TB383.1
，
本文编号：2480655
[Abstract]:Gold and silver alloy nanoparticles were prepared by using pineapple leaves extract as protective agent and reductant. The composition ratios of gold to silver were about 3:1 and 1 脳 1 at 333 K and 363 K, respectively. The nucleation and growth kinetics of gold and silver nanoparticles were determined by UV-vis spectrophotometry. The effect of temperature on the nucleation growth of silver was more obvious, and the difference of nucleation growth rate between gold and silver nanoparticles was less than 2 times at 363 K. It is easy to form alloy nanoparticles with the same proportion. By infrared analysis before and after the reaction of plant molecules in the extract, it was found that some silver ions were not completely reduced at 333 K, so that the corresponding content of the alloy was lower. The alloy nanoparticles with a composition of about 1:1 showed a strong Raman enhancement effect in the detection of Rhodamine.
【作者单位】： 南昌工程学院理学院;
【基金】：国家自然科学基金项目(51303074,21506088) 江西省自然科学基金项目(20161BBF60061)~~
【分类号】：TG146.31;TB383.1
，
本文编号：2480655
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