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
发表期刊ANALYTICAL CHEMISTRY
ISSN0003-2700
卷号88期号:1页码:906—914
文章类型期刊文献
摘要Iron 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.
关键词Anodic-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
收录类别SCI
语种英语
WOS记录号WOS:000367866100075
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/25763
专题中科院上海应用物理研究所2011-2018年
通讯作者Li, LN (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China.
推荐引用方式
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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