新型核壳SERS探针用于痕量砷酸根离子检测研究
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- 英文论文题名：Core-shell SERS Probe for Trace Arsenate Detection
- 论文作者：曾珊 ; 丁婧 ; 仲英惠 ; 孙航
- 英文论文作者：Shan Zeng ; Jing Ding ; Yinghui Zhong ; Hang Sun ; Key Laboratory of Bionic Engineering (Ministry of Education) ; College of Biological and Agricultural Engineering ; Jilin University
- 年：2016
- 作者机构：吉林大学生物与农业工程学院工程仿生教育部重点实验室;
- 论文关键词：核壳 ; Fe_3O_4 ; SERS ; 砷酸根
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十六分会：环境化学
- 语种：中文
- 分类号：R123.1;O657.37
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十六分会 ; 环境化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：114k
- 原文格式：D
- 会议级别：全国
摘要
开发快速有效且可信赖的痕量有毒重金属离子检测技术是提高饮用水安全的前提,如何使待测离子在表面增强拉曼散射(SERS)基底表面富集是降低SERS检测限的关键问题之一[1]。Fe_3O_4纳米粒子具有优异的重金属离子吸附特性,还可通过解吸附活化再生。本文通过胶体化学的方法制备了贵金属@Fe_3O_4核壳SERS探针用于砷酸根离子的痕量检测[2]。贵金属@Fe_3O_4核壳SERS探针能有效的集成贵金属核的SERS增强效果以及Fe_3O_4对有毒砷酸根离子的吸附和磁响应特性,展现了对水体中砷酸根离子高的SERS检测活性[3]。实验结果表明相比于贵金属纳米粒子核,贵金属@Fe_3O_4核壳SERS探针对砷酸根离子的检测限明显降低,且表面增强拉曼光谱强度与砷酸根离子浓度具有良好的线性关系,此外贵金属@Fe_3O_4核壳纳米粒子可以通过在碱溶液中解吸再生,实现SERS循环检测。我们研制的贵金属@Fe_3O_4核壳纳米粒子具有灵敏度高、稳定、可回收等优点,在饮用水安全检测领域具有重要的应用前景。
A prerequisite for improving the safety of drinking water is to develop an effective and reliable method for the detection of trace toxic heavy metal ions.How to increase the adsorption of ions on Surface-Enhanced Raman Scattering(SERS) active substrate is an issue to reduce the SERS detection limit.Fe_3O_4 nanoparticles show excellent performance and can also be activated and regenerated through desorption.In this paper,noble metal@Fe_3O_4 core-shell nanoparticles were prepared to use in trace arsenate detection,which show high SERS activity and can also decrease the detection limit.Additionally,a good linear relationship between the SERS intensity of As(V) and their concentrations has been achieved,and noble metal@Fe_3O_4 core-shell nanoparticles could be regenerated through desorption in alkaline solution.Therefore,Noble metal@Fe_3O_4 core-shell nanoparticles we prepared are highly sensitive,stable and recyclable,and exhibit a potential for future use in detection of drinking water.
A prerequisite for improving the safety of drinking water is to develop an effective and reliable method for the detection of trace toxic heavy metal ions.How to increase the adsorption of ions on Surface-Enhanced Raman Scattering(SERS) active substrate is an issue to reduce the SERS detection limit.Fe_3O_4 nanoparticles show excellent performance and can also be activated and regenerated through desorption.In this paper,noble metal@Fe_3O_4 core-shell nanoparticles were prepared to use in trace arsenate detection,which show high SERS activity and can also decrease the detection limit.Additionally,a good linear relationship between the SERS intensity of As(V) and their concentrations has been achieved,and noble metal@Fe_3O_4 core-shell nanoparticles could be regenerated through desorption in alkaline solution.Therefore,Noble metal@Fe_3O_4 core-shell nanoparticles we prepared are highly sensitive,stable and recyclable,and exhibit a potential for future use in detection of drinking water.
引文
[1]Li,J.;Huang,Y.;Ding,Y.;Yang,Z.;Li,S.;Zhou,X.;Fan,F.;Zhang,W.;Zhou,Z.;Wu,D.;Ren,B.;Wang,Z.;Tian,Z.;Nature.2010,464:392.
[2]Sun,H.;He,J.;Wang,J.;Zhang,S.;Liu,C.;Sritharan,T.;Mhaisalkar,S.;Han,M.;Wang,D.;Chen,H.J.Am.Chem.Soc.2013,135:9099.
[3]Mulvihil,M.;Tao,A.;Benjauthrit,K.;Arnold,J.;Yang,P.Angew.Chem.Int.Ed.2008,47:6456.
[2]Sun,H.;He,J.;Wang,J.;Zhang,S.;Liu,C.;Sritharan,T.;Mhaisalkar,S.;Han,M.;Wang,D.;Chen,H.J.Am.Chem.Soc.2013,135:9099.
[3]Mulvihil,M.;Tao,A.;Benjauthrit,K.;Arnold,J.;Yang,P.Angew.Chem.Int.Ed.2008,47:6456.