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DINESH CHANDRA TIWARI
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Volume 45 All articles Published: 16 May 2022 Article ID 0087
Hydrothermally synthesized polycrystalline Ce-TiO$_2$@rGO compound for sensing of para-nitroaniline
NEERAJ KUMAR ARTI SHARMA DINESH CHANDRA TIWARI RADHA TOMAR
Polycrystalline Ce-TiO$_2$@rGO compound has been successfully synthesized by hydrothermal method. The synthesized compound was characterized by powder X-ray diffraction (XRD), Fourier transform-infrared spectrophotometer,field-emission scanning electron microscopy, transmission electron microscopy and thermogravimetric analysis to confirm its crystallinity, morphology and thermal stability. From XRD results, crystallite size of the Ce-TiO$_2$@rGO compound was found between 9–15.2 nm, and SEM images confirm the needle-like structure of Ce-TiO$_2$ particles distributed over the reduced graphene oxide (rGO) layer. Further, the electrochemical behaviour of the Ce-TiO$_2$@rGO compound was examined by cyclic voltammetry and differential pulse voltammetry (DPV) techniques for the electrochemical detection of para-nitroaniline. The surface of the glassy carbon electrode was modified by the drop-castingtechnique. The scan rate effect showed that the electrode process is diffusion controlled. T he modified glassy carbon electrode (MGCE) exhibited the 0.347 ${\mu}$M limit of detection, satisfactory sensitivity of 49.12 ${\mu}$A ${\mu}$M$^{-1}$ m$^{-2}$ and linearrange between 0.1 and 1.5 ${\mu}$M. DPV interference studies results confirmed the selectivity of MGCE. The developed MGCE electrochemical sensor thus implemented is also advantageous for its good selectivity, stability, cost-effectiveness, portability and reproducibility.
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Bulletin of Materials Science
Volume 46, 2023
All articles
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