Enhancing selectivity in stripping voltammetry by different adsorption behaviors: the use of nanostructured Mg-Al-layered double hydroxides to detect Cd(II).

We report the use of nanostructured layered double hydroxides (LDHs) for the highly selective and sensitive detection of Cd(2+) using anodic stripping voltammetry (ASV). In particular, the modification of a glassy carbon electrode promotes the sensitivity and selectivity towards Cd(2+) in the presence of Pb(2+), Hg(2+), Cu(2+) and Zn(2+). The electrochemical characterization and anodic stripping voltammetric performance of Cd(2+) were evaluated using cyclic voltammetry (CV) and square wave anodic stripping voltammetry (SWASV) analysis. Operational parameters, including supporting electrolytes, pH value, deposition potential and deposition time were optimized. In addition, the selectivity, interference and stability were also investigated under the optimized conditions. The results showed that the fabricated electrode possessed good selectivity, stability and reproducibility. The proposed electrochemical sensing strategy is thus expected to open new opportunities to broaden the use of ASV in analysis for detecting heavy metal ions in the environment.

[1]  D. B. Hibbert,et al.  Sub-ppt detection limits for copper ions with Gly-Gly-His modified electrodes. , 2001, Chemical communications.

[2]  P. Dutta,et al.  Handbook of Layered Materials , 2004 .

[3]  M. Ulibarri,et al.  Adsorption of Cu2+, Cd2+ and Pb2+ ions by layered double hydroxides intercalated with the chelating agents diethylenetriaminepentaacetate and meso-2,3-dimercaptosuccinate , 2009 .

[4]  Zhiwei Zhu,et al.  Electrochemical DNAzyme sensor for lead based on amplification of DNA-Au bio-bar codes. , 2008, Analytical chemistry.

[5]  S. Komarneni,et al.  Reactions of Cu2+ and Pb2+ with Mg/Al layered double hydroxide , 2007 .

[6]  Jun Hu,et al.  The adsorption of Pb(II) on Mg2Al layered double hydroxide , 2011 .

[7]  Xianluo Hu,et al.  Stripping voltammetric detection of mercury(II) based on a bimetallic Au-Pt inorganic-organic hybrid nanocomposite modified glassy carbon electrode. , 2010, Analytical chemistry.

[8]  Juan Xu,et al.  A novel electrochemical DNAzyme sensor for the amplified detection of Pb2+ ions. , 2010, Chemical communications.

[9]  W. Qin,et al.  Nanomaterial/ionophore-based electrode for anodic stripping voltammetric determination of lead: an electrochemical sensing platform toward heavy metals. , 2009, Analytical chemistry.

[10]  S. Komarneni,et al.  Novel function for anionic clays: selective transition metal cation uptake by diadochy , 1998 .

[11]  Shi-Zhao Kang,et al.  High sensitivity to Cu2+ ions of electrodes coated with ethylenediamine-modified multi-walled carbon nanotubes , 2006 .

[12]  M. Esteban,et al.  Binding of Hg2+ with phytochelatins: study by differential pulse voltammetry on rotating Au-disk electrode, electrospray ionization mass-spectrometry, and isothermal titration calorimetry. , 2009, Environmental science & technology.

[13]  Juan Cornejo,et al.  Uptake of Cu2+, Cd2+ and Pb2+ on Zn–Al layered double hydroxide intercalated with edta , 2006 .

[14]  Yuehe Lin,et al.  Voltammetric detection of Cr(VI) with disposable screen-printed electrode modified with gold nanoparticles. , 2007, Environmental science & technology.

[15]  Kangbing Wu,et al.  Voltammetric determination of Cd2+ based on the bifunctionality of single-walled carbon nanotubes-Nafion film. , 2007, Analytica chimica acta.

[16]  Nongjian Tao,et al.  Detection of heavy metal ions in drinking water using a high-resolution differential surface plasmon resonance sensor. , 2005, Environmental science & technology.

[17]  A. Girlando,et al.  SERS spectra of TCNQ and TTF radical ions adsorbed on Ag and Au electrodes , 1985 .

[18]  Sedky H. A. Hassan,et al.  Detection of Cr6+ by the sulfur oxidizing bacteria biosensor: effect of different physical factors. , 2012, Environmental science & technology.

[19]  W. Qin,et al.  Fabrication and Characterization of Carbon Nanotube‐Hydroxyapatite Nanocomposite: Application to Anodic Stripping Voltammetric Determination of Cadmium , 2009 .

[20]  Xingjiu Huang,et al.  High adsorptive γ-AlOOH(boehmite)@SiO2/Fe3O4 porous magnetic microspheres for detection of toxic metal ions in drinking water. , 2011, Chemical communications.

[21]  Xingjiu Huang,et al.  Selective adsorption toward toxic metal ions results in selective response: electrochemical studies on a polypyrrole/reduced graphene oxide nanocomposite. , 2012, Chemical communications.

[22]  R. Yu,et al.  Ultrasensitive electrochemical sensor for mercury (II) based on target-induced structure-switching DNA. , 2010, Biosensors & bioelectronics.

[23]  L. P. Eksperiandova,et al.  Analysis of waste water by x‐ray fluorescence spectrometry , 2002 .

[24]  B. Dousova,et al.  Sorption of As(V) Species from Aqueous Systems , 2003 .

[25]  W. Hou,et al.  Sorption of lead ion by layered double hydroxide intercalated with diethylenetriaminepentaacetic acid , 2010 .

[26]  H. Nugteren,et al.  Purification of chromium(VI) finishing wastewaters using calcined and uncalcined Mg-Al-CO3-hydrotalcite. , 2005, Water research.

[27]  Xiaobo Ji,et al.  Electroanalytical Determination of Cadmium(II) and Lead(II) Using an in-situ Bismuth Film Modified Edge Plane Pyrolytic Graphite Electrode , 2007, Analytical sciences : the international journal of the Japan Society for Analytical Chemistry.

[28]  A. Mohadesi,et al.  Multiwalled carbon nanotube modified with 1-(2-pyridylazo)-2-naphthol for stripping voltammetric determination of Pb(II). , 2010, The Analyst.

[29]  D. Sparks,et al.  Arsenic speciation and reactivity in poultry litter. , 2003, Environmental science & technology.

[30]  D. Bannon,et al.  Anodic stripping voltammetry compared with graphite furnace atomic absorption spectrophotometry for blood lead analysis. , 2001, Clinical chemistry.

[31]  C. Banks,et al.  Anodic Stripping Voltammetry: An AFM Study of Some Problems and Limitations , 2004 .

[32]  Xianluo Hu,et al.  Efficient removal of heavy metal ions from aqueous systems with the assembly of anisotropic layered double hydroxide nanocrystals@carbon nanosphere. , 2011, Environmental science & technology.

[33]  Guohua Zhao,et al.  A simple, stable and picomole level lead sensor fabricated on DNA-based carbon hybridized TiO(2) nanotube arrays. , 2010, Environmental science & technology.

[34]  Shiuh-Jen Jiang,et al.  Determination of cadmium, mercury and lead in seawater by electrothermal vaporization isotope dilution inductively coupled plasma mass spectrometry , 1999 .

[35]  Xingjiu Huang,et al.  Three-dimensional hierarchical flower-like Mg-Al-layered double hydroxides: highly efficient adsorbents for As(V) and Cr(VI) removal. , 2012, Nanoscale.

[36]  S. Karna,et al.  Potentiometric stripping analysis of bismuth based on carbon paste electrode modified with cryptand (2.2.1) and multiwalled carbon nanotubes , 2010 .