Thiacalixarene Covalently Functionalized Multiwalled Carbon Nanotubes as Chemically Modified Electrode Material for Detection of Ultratrace Pb2+ Ions

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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
刊名	ANALYTICAL CHEMISTRY
	2012
卷号	84 期号:24
ISSN号	0003-2700
英文摘要	This 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.
语种	英语
WOS记录号	WOS:000312429800011
公开日期	2013-12-05
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/13326]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 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).