Fig 1.
Schematic representation of growth mechanism of Fe3O4.CNTs NCs by a wet-chemical process.
Fig 2.
(a-c) UV/Vis spectra and (b-d) Band-gap energy plot of Fe3O4 NPs and Fe3O4.CNT NCs.
Fig 3.
(a) FT-IR spectra, and (b) XRD patterns of CNT, Fe3O4 NPs and Fe3O4.CNT NCs.
Fig 4.
Magnified FESEM images (a) CNT, (b) Fe3O4 NPs, and (c-d) Fe3O4.CNT NCs.
Fig 5.
Elemental analysis (a) CNT, (b) Fe3O4 NPs, and (c-d) Fe3O4.CNT NCs.
Fig 6.
XPS study of CNT, Fe3O4 NPs, and Fe3O4.CNT NCs (a) Full spectrum, (b) C1s level, (c) O1s, and (d) Fe2+ 2p3/2 and Fe2+ 2p1/2 level.
Table 1.
Binding energies of NMs.
Fig 7.
TEM analysis of Fe3O4.CNT nanocomposites (a-b) Low-to-high magnified images.
Fig 8.
Schematic view (a) Coated rod-shape round disc-GCE, (b) Expected I-V curve, (c) Observed I-V response, (d) Proposed detection mechanism of 3-MP by Fe3O4.CNT NCs/GCE.
Fig 9.
Current-voltage responses of Fe3O4.CNT NCs (a) Bare and coated electrode, (b) Absence and presence of 3-MP, (c) Concentration variation of the 3-MP and (d) Calibration curve.
Fig 10.
(a) Response time, (b) Selectivity, (c) Reproducibility study, and (d) Control experiment.
Table 2.
Detection of phenols using different electrochemical approach.
Table 3.
Measurement of 3-MP using modified Fe3O4.CNT NCs/GCE.