Journal
MICROCHIMICA ACTA
Volume 182, Issue 9-10, Pages 1803-1809Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-015-1517-5
Keywords
Electrochemical sensor; Hydrogen peroxide; Carbon nanotube-MoS2 hybrids; Non-enzymatic sensor
Categories
Funding
- National Natural Science Foundation of China [41176079, 21305016, 21475025]
- National Science Foundation of Fujian Province [2014 J07001]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT1116]
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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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