A highly sensitive hydrogen peroxide amperometric sensor based on MnO2-modified vertically aligned multiwalled carbon nanotubes

Analytica Chimica Acta
Bin XuWei-De Zhang

Abstract

In this report, a highly sensitive amperometric sensor based on MnO(2)-modified vertically aligned multiwalled carbon nanotubes (MnO(2)/VACNTs) for determination of hydrogen peroxide (H(2)O(2)) was fabricated by electrodeposition. The morphology of the nanocomposite was characterized by scanning electron microscopy, energy-dispersive X-ray spectrometer and X-ray diffraction. Cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy were applied to investigate the electrochemical properties of the MnO(2)/VACNTs nanocomposite electrode. The mechanism for the electrochemical reaction of H(2)O(2) at the MnO(2)/VACNTs nanocomposite electrode was also discussed. In borate buffer (pH 7.8, 0.20 M), the MnO(2)/VACNTs nanocomposite electrode exhibits a linear dependence (R=0.998) on the concentration of H(2)O(2) from 1.2 x 10(-6)M to 1.8 x 10(-3)M, a high sensitivity of 1.08 x 10(6) microA M(-1) cm(-2) and a detection limit of 8.0 x 10(-7) M (signal/noise=3). Meanwhile, the MnO(2)/VACNTs nanocomposite electrode is also highly resistant towards typical inorganic salts and some biomolecules such as acetic acid, citric acid, uric acid and D-(+)-glucose, etc. In addition, the sensor based on the MnO(2)/VACNTs nanocompo...Continue Reading

Citations

Nov 3, 2011·Analytical Chemistry·Danielle W KimmelDavid E Cliffel
Dec 11, 2014·Materials Science & Engineering. C, Materials for Biological Applications·Ali A EnsafiB Rezaei
Dec 4, 2014·Analytica Chimica Acta·Meng-Che TuBo Liedberg
Jul 29, 2016·Scientific Reports·Md Abu AbrarWoo Soo Kim
Jun 28, 2016·Chemistry : a European Journal·Kuan-Ting LeeShih-Yuan Lu
Feb 13, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Chaiti RayTarasankar Pal
Jul 28, 2016·Chemical Society Reviews·Khurram ShehzadXiangfeng Duan
Jan 7, 2013·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Peng SiDong-Hwan Kim
Jun 14, 2017·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Qi WangChun Mao
Mar 30, 2018·Mikrochimica Acta·Keerthy Dhara, Debiprosad Roy Mahapatra
Jan 27, 2021·Emergent Materials·Özgecan ErdemFatih Inci
Aug 10, 2021·Cell Reports. Physical Science·Long ChenJu Li

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