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Thiacalixarene Covalently Functionalized Multiwalled Carbon Nanotubes as Chemically Modified Electrode Material for Detection of Ultratrace Pb2+ Ions
Wang, L; Wang, XY; Shi, GS(石国升); Peng, C(彭程); Ding, YH
2012
Source PublicationANALYTICAL CHEMISTRY
ISSN0003-2700
Volume84Issue:24
AbstractThis paper presents the preparation of novel thiacalixarene (TCA) covalently functionalized multiwalled carbon nanotubes (MVVCNTs) and an enhanced differential pulse anodic stripping voltammetric procedure for the determination of trace amounts of Pb2+ ions, which relies on the selective accumulation of the metals at a TCA-MWCNT-modified glassy carbon electrode. Through a combination of thiacalixerene's excellent selective recognition and the outstanding electronic properties of MWCNTs, this electrode material shows excellent selectivity and high sensitivity for electrochemical detection of Pb2+ ions. The stripping response is highly linear (R = 0.999) over a Pb2+ concentration range of 2 x 10(-10) to 1 x 10(-8) mol/L, and the limit of detection is 4 x 10(-11) mol/L. Furthermore, the determination of Pb2+ (10(-7) mol/L) in the presence of an equal amount of interfering Sn2+ ions yielded well-separated signals. To understand the molecular interaction mechanism between the TCA molecules and metal ions (Pb2+ and Sn2+), theoretical computations were performed. The results demonstrate that the Pb2+/Sn2+ ions could stably adsorb onto the TCA molecules, and there is significant electron delocalization between Pb2+/Sn2+ and sulfur atoms in the TCA molecule.
Language英语
Funding Project应物所项目组
WOS IDWOS:000312429800011
Citation statistics
Cited Times:59[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13326
Collection中科院上海应用物理研究所2011-2020年
Recommended Citation
GB/T 7714
Wang, L,Wang, XY,Shi, GS,et al. Thiacalixarene Covalently Functionalized Multiwalled Carbon Nanotubes as Chemically Modified Electrode Material for Detection of Ultratrace Pb2+ Ions[J]. ANALYTICAL CHEMISTRY,2012,84(24).
APA Wang, L,Wang, XY,Shi, GS,Peng, C,&Ding, YH.(2012).Thiacalixarene Covalently Functionalized Multiwalled Carbon Nanotubes as Chemically Modified Electrode Material for Detection of Ultratrace Pb2+ Ions.ANALYTICAL CHEMISTRY,84(24).
MLA Wang, L,et al."Thiacalixarene Covalently Functionalized Multiwalled Carbon Nanotubes as Chemically Modified Electrode Material for Detection of Ultratrace Pb2+ Ions".ANALYTICAL CHEMISTRY 84.24(2012).
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