【摘要】：以菠蘿蜜葉提取液作為保護劑和還原劑制備金銀合金納米顆粒,在333 K和363 K時制備的合金納米顆粒的金與銀的組成比分別約為3:1和1:1。采用紫外-可見分光光度法分別測定金與銀納米顆粒的成核生長動力學,溫度對銀的成核生長影響更加明顯,在363 K時兩者成核生長速度相差不到2倍,容易形成比例相當?shù)暮辖鸺{米顆粒。對提取液中植物分子反應前后紅外分析,得出333 K時有部分銀離子沒有完全還原而使得合金中相應含量比例較低。而組成約為1:1的合金納米顆粒在羅丹明的檢測中顯示出較強的拉曼增強效應。
[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.
【作者單位】： 南昌工程學院理學院;
【基金】：國家自然科學基金項目(51303074,21506088) 江西省自然科學基金項目(20161BBF60061)~~
【分類號】：TG146.31;TB383.1
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本文編號：2480655