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Iron Oxide with Different Crystal Phases (alpha- and gamma-Fe2O3) in Electroanalysis and Uftrasensitive and Selective Detection of Lead(II): An Advancing Approach Using XPS and EXAFS
Li, SS; Li, WJ; Jiang, TJ; Liu, ZG; Chen, X; Cong, HP; Liu, JH; Huang, YY; Li, LN; Huang, XJ; Li, LN (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China.
2016
Source PublicationANALYTICAL CHEMISTRY
ISSN0003-2700
Volume88Issue:1Pages:906—914
Subtype期刊文献
AbstractIron oxide with different crystal phases (alpha- and gamma-Fe2O3) has been applied to electrode coatings and been demonstrated to ultrasensitive and selective electrochemical sensing toward heavy metal ions (e.g., Pb(II)). A range of Pb(II) contents in micromoles (0.1 to 1.0 mu M) at alpha-Fe2O3 nanoflowers with a sensitivity of 137.23 mu A mu M-1 cm(-2) and nanomoles (from 0.1 to 1.0 nM) at gamma-Fe2O3 nanoflowers with a sensitivity of 197.82 mu A nM(-1) cm(-2) have been investigated. Furthermore, an extended X-ray absorption fine structure (EXAFS) technique was applied to characterize the difference of local structural environment of the adsorbed Pb(II) on the surface of alpha- and gamma-Fe2O3. The results first showed that alpha- and gamma-Fe2O3 had diverse interaction between Pb(II) and iron (hydro)oxides, which were consistent with the difference of electrochemical performance. Determining the responses of Cu(II) and Hg(II) as the most appropriate choice for comparison, the stripping voltammetric quantification of Pb(II) with high sensitivity and selectivity at gamma-Fe2O3 nanoflower has been demonstrated. This work reveals that the stripping performances of a nanomodifier have to be directly connected with its intrinsic surface atom arrangement.
KeywordAnodic-stripping Voltammetry Bond-valence Determination Toxic Metal-ions Density-functional Theory Pb(Ii) Sorption Products Surface Complexation Carbon Nanotubes Water Interfaces Alpha-fe2o3 Nanostructures Electrochemical Detection
DOI10.1021/acs.analchem.5b03570
Indexed BySCI
Language英语
WOS IDWOS:000367866100075
Citation statistics
Cited Times:46[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/25763
Collection中科院上海应用物理研究所2011-2018年
Corresponding AuthorLi, LN (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China.
Recommended Citation
GB/T 7714
Li, SS,Li, WJ,Jiang, TJ,et al. Iron Oxide with Different Crystal Phases (alpha- and gamma-Fe2O3) in Electroanalysis and Uftrasensitive and Selective Detection of Lead(II): An Advancing Approach Using XPS and EXAFS[J]. ANALYTICAL CHEMISTRY,2016,88(1):906—914.
APA Li, SS.,Li, WJ.,Jiang, TJ.,Liu, ZG.,Chen, X.,...&Li, LN .(2016).Iron Oxide with Different Crystal Phases (alpha- and gamma-Fe2O3) in Electroanalysis and Uftrasensitive and Selective Detection of Lead(II): An Advancing Approach Using XPS and EXAFS.ANALYTICAL CHEMISTRY,88(1),906—914.
MLA Li, SS,et al."Iron Oxide with Different Crystal Phases (alpha- and gamma-Fe2O3) in Electroanalysis and Uftrasensitive and Selective Detection of Lead(II): An Advancing Approach Using XPS and EXAFS".ANALYTICAL CHEMISTRY 88.1(2016):906—914.
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