Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 50, Pages 43343-43351Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b11741
Keywords
MXenes; MXene/graphite composite; cyclic voltammetry; adrenaline; detection limit
Funding
- KSCSTE, Govt. of Kerala
- Ramanujan Fellowship, Department of Science and Technology (DST), Govt. of India
- CSIR-NIIST Thiruvananthapuram, India
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MXene/graphite composite paste electrode (MXene/GCPE)-based electrochemical sensor has been fabricated for the detection of adrenaline. The electrode exhibits a sensitive response to adrenaline in phosphate buffer solution of pH 7.4, and its catalytic activity is much higher than that of the bare graphite paste electrode. The electron transfer reaction of MXene/GCPE is a diffusion controlled process. The graph of concentration of adrenaline with the peak current exhibits two linearities, one in the lower and other in the higher concentration range with a detection limit of 9.5 nM. The simultaneous analyses of adrenaline, ascorbic acid, and serotonin reveal that the fabricated electrode could separate the overlapped cyclic voltammetric peaks of these ternary mixtures. This electrode has been further employed in the detection of adrenaline in pharmaceutical samples with 99.2-100.8% recoveries.
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