Abstract
We report on a non-enzymatic electrochemical sensing strategy for ultrasensitive detection of hydrogen peroxide (H2O2) at nanomolar levels. A glassy carbon electrode (GCE) was modified with a hybrid material consisting of multiwalled carbon nanotubes (CNT) and molybdenum disulfide (MoS2). Transmission electron microscopy and Raman spectroscopy were employed to characterize the hybrid nanostructures. GCEs modified with carbon nanotubes, or nanoscaled MoS2, or with the CNT-MoS2 hybrid were investigated with respect to sensing H2O2, and this revealed that the GCE modified with the CNT-MoS2 hybrid performed best and resulted in a limit of detection as low as 5.0 nM. A repeatability and intermediate precision of 9 % was accomplished. The method was applied to determine H2O2 in spiked sterilized milk and gave satisfactory results.
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Acknowledgments
Support by the National Natural Science Foundation of China (41176079, 21305016 & 21475025), the National Science Foundation of Fujian Province (2014 J07001), and the Program for Changjiang Scholars and Innovative Research Team in University (IRT1116) is gratefully acknowledged.
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Lin, Y., Chen, X., Lin, Y. et al. Non-enzymatic sensing of hydrogen peroxide using a glassy carbon electrode modified with a nanocomposite made from carbon nanotubes and molybdenum disulfide. Microchim Acta 182, 1803–1809 (2015). https://doi.org/10.1007/s00604-015-1517-5
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DOI: https://doi.org/10.1007/s00604-015-1517-5