A lead(II) sensor based on a glassy carbon electrode modified with Fe3O4 nanospheres and carbon nanotubes

作者：Yang, Yinglan; You, Yong; Liu, Yunchun; Yang, Zhousheng^*

来源：Microchimica Acta, 2013, 180(5-6): 379-385.

DOI：10.1007/s00604-013-0940-8

• Pb(II)
• Fe3O4 nanospheres
• Multi-walled carbon nanotubes
• Sensor

We have developed a highly sensitive and selective sensor for lead(II) ions. A glassy carbon electrode was modified with Fe3O4 nanospheres and multi-walled carbon nanotubes, and this material was characterized by scanning electron microscopy and X-ray diffraction. The electrode displays good electrochemical activity toward Pb(II) and gives anodic and cathodic peaks with potentials at -496 mV and -638 mV (vs. Ag/AgCl) in pH 6.0 solution. The sensor exhibits a sensitive and fairly selective response to Pb(II) ion, with a linear range between 20 pM and 1.6 nM, and a detection limit as low as 6.0 pM (at a signal-to noise ratio of 3). The sensor was successfully applied to monitor Pb(II) in spiked water samples.

• 出版日期2013-4
• 单位安徽师范大学