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Title:
“Turn-on” Fluorescence Detection of Lead Ions Based on Accelerated Leaching of Gold Nanoparticles on the Surface of Graphene
Author: Fu, XL ; Lou, TT ; Chen, ZhaoPeng(陈兆鹏) ; Lin, M ; Feng, WeiWei(冯巍巍) ; Chen, LX
Source: ACS APPLIED MATERIALS & INTERFACES
ISSN: 1944-8244
Issued Date: 2012-02
Volume: 4, Issue:2, Pages:1080-1086
Keyword: lead ions ; fluorescence detection ; graphene ; gold nanoparticles ; leaching
Subject: Science & Technology - Other Topics; Materials Science
Rank: [Fu, Xiuli; Lou, Tingting; Chen, Zhaopeng; Lin, Meng; Feng, Weiwei; Chen, Lingxin] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc, Yantai 264003, Peoples R China; [Fu, Xiuli; Lou, Tingting; Chen, Zhaopeng; Lin, Meng; Feng, Weiwei; Chen, Lingxin] Yantai Inst Coastal Zone Res, Shandong Prov Key Lab Coastal Zone Environm Proc, Yantai 264003, Peoples R China; [Fu, Xiuli; Lou, Tingting] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Corresponding Author: Chen, LX (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc, Yantai 264003, Peoples R China. lxchen@yic.ac.cn
Department: 环境化学实验室 
Abstract: A novel, platform for effective "turn-on" fluorescence sensing of lead ions (Pb2+) in aqueous solution was developed based on gold nanoparticle (AuNP)-functionalized graphene. The AuNP-functionalized graphene exhibited minimal background fluorescence because of the extraordinarily high quenching ability of AuNPs. Interestingly, the AuNP-functionalized graphene underwent fluorescence restoration as well as significant enhancement upon adding Pb2+, which was attributed to the fact that Pb2+ could accelerate the leaching rate. of the AuNPs on graphene surfaces in the presence of both thiosulfate (S2O32-) and 2-mercaptoethanol (2 ME) Consequently, this could be utilized as the basis for selective defection of Pb2+. With the optimum conditions chosen the:relative fluorescence intensity showed good linearity versus logarithm concentration of Pb2+ in the range of 50-1000 nM (R = 0.9982), and a detection limit of 10 nM. High selectivity over common coexistent metal ions was also demonstrated: The practical application had been carried out for determination of Pb2+ in tap water and mineral water samples. The Pb2+-specific "turn-on" fluorescence sensor, based on Pb2+ accelerated leaching of AuNPs on the surface of graphene, provided new opportunities for highly sensitive and selective Pb2+ detection in aqueous media.
Indexed Type: SCI
Related URLs: 查看原文
Language: 英语
Content Type: 期刊论文
URI: http://ir.yic.ac.cn/handle/133337/5492
Appears in Collections:环境化学实验室_期刊论文

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Recommended Citation:
Fu, XL,Lou, TT,Chen, ZP,et al. “Turn-on” Fluorescence Detection of Lead Ions Based on Accelerated Leaching of Gold Nanoparticles on the Surface of Graphene[J]. ACS APPLIED MATERIALS & INTERFACES,2012,4(2):1080-1086.
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