• <mark id="l0x4h"></mark>

      <u id="l0x4h"></u>
        <ins id="l0x4h"></ins>

      1. <bdo id="l0x4h"></bdo>
      2. 基于功能化Au@Ag納米棒的表面增強拉曼光譜檢測汞離子
        DOI:
        作者:
        作者單位:

        作者簡介:

        通訊作者:

        中圖分類號:

        基金項目:

        國家自然科學基金項目(31671933); 湖北省自然科學基金青年項目(2019CFB408)


        Detecting mercury ions based on surface enhanced Raman spectroscopy of functionalized Au@Ag nanorod
        Author:
        Affiliation:

        Fund Project:

        • 摘要
        • |
        • 圖/表
        • |
        • 訪問統計
        • |
        • 參考文獻
        • |
        • 相似文獻
        • |
        • 引證文獻
        • |
        • 資源附件
        • |
        • 文章評論
          摘要:

          建立了1種基于功能化Au@Ag納米棒(Au@Ag NRs)的表面增強拉曼光譜(SERS)技術來實現溶液中Hg2+的定量檢測。Hg2+存在下,其與Au@Ag NRs 表面的2,5二巰基1,3,4噻二唑(DMCT)發生配位作用引起SERS檢測探針聚集,產生“熱點”效應,致使DMCT在1 360 cm-1處的SERS信號增強。在0.1~10 μg/L質量濃度區間內線性關系良好:Y=195.49384X + 1676.23663(R2=0.991),檢出限為17 ng/L,低于世界衛生組織(WHO)規定飲用水中Hg2+的限量(1 μg/L)。在實際水樣中進行Hg2+加標回收檢測,回收率為100.1%~106.5%,相對標準偏差為1.23%~7.99%。

          Abstract:

          A surfaceenhanced Raman spectroscopy (SERS) technique based on functionalized Au@Ag nanorods (Au@Ag NRs) was established to quantitatively detect Hg2+ in aqueous solutions.In the presence of Hg2+,its coordination with 2,5 dimercapto 1,3,4-thiadiazole (DMCT) on the surface of Au@AgNRs caused the aggregation of SERS detection probes,resulting in a “hot spot” effect,leading to the SERS signal of DMCT increased at 1 360 cm-1.The increased SERS signal showed a good linear relationship with Hg2+ in the concentration range from 0.1 to 10 μg/L :Y=195.49384X+1676.23663(R2=0.991).The detection limit was as low as 17 ng/L,much lower than that of the Hg2+ content(1 μg/L) in drinking water specified by World Health Organization(WHO).The results of spiked recovery test carried out in the actual water sample showed that the spiked recoveries of Hg2+ were from 100.1% to 106.5%,and the relative standard deviations were from 1.23% to 7.99%.The Hg2+ sensing detection technique with accuracy,rapidity and high sensitivity based on SERS has an effective application for quantitatively detecting Hg2+ in real water.

          參考文獻
          相似文獻
          引證文獻
        引用本文

        孔祥宇,白向茹,王利華,曾令文.基于功能化Au@Ag納米棒的表面增強拉曼光譜檢測汞離子[J].華中農業大學學報,2020,39(4):15-21

        復制
        分享
        文章指標
        • 點擊次數:
        • 下載次數:
        • HTML閱讀次數:
        • 引用次數:
        歷史
        • 收稿日期:2019-08-13
        • 最后修改日期:
        • 錄用日期:
        • 在線發布日期: 2020-07-30
        • 出版日期:
        牌九游戏