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Porous Tal Palm Carbon Nanosheet: Preparation, Characterization and Application for Simultaneous Determination of Dopamine and Uric Acid

Abstract

Novel porous tal palm carbon nanosheet (PTPCN) material was synthesized from the leaves of Borassus flabellifer (tal palm) and used for developing an electrochemical sensor through modifying glassy carbon electrodes (GCEs) simply by drop casting for sensitive simultaneous detection of dopamine (DA) and uric acid (UA) in presence of interfering species. The drop casting solution was prepared by simply dispersing PTPCNs material in ethanol without using any other binding materials (e.g. nafion). Surface morphologies of the PTPCNs were studied through field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and high resolution TEM (HRTEM). Energy dispersive X-ray spectroscopic (EDS) and X-ray diffraction spectroscopic (XPS) studies revealed the chemical composition of the PTPCNs surface. Structural properties were studied using X-ray diffraction (XRD) and Raman spectrometer. Brunauer–Emmett–Teller (BET) analysis confirmed the surface area and pore volume to be 1094.53 m²/g and 0.74 cm3/g, respectively while Barrett-Joyner-Halenda (BJH) pore-size distribution showed average pore size to be 22 nm. The sufficiently large surface area and pore size distribution promised to have better electro-catalytic properties compared to average modifying materials. The modified electrode (PTPCNs/GCE) was characterized through impedimetric and CV techniques in standard potassium ferricyanide solution for evaluating its charge transfer resistance and electrochemical properties. Limit of detection (S/N=3) were 0.17 µM and 0.078 µM and sensitivities were 1.2057 µA µM-1 cm-2 and 2.693 µA µM-1 cm-2 for UA and DA, respectively. The possible interactions that took place between PTPCNs and the analytes which aided in the enhancement of electroanalytical performance of the PTPCNs/GCE have been discussed based on experimental findings and established theoretical concepts. The PTPCNs/GCE was successfully employed for analyzing real samples like dopamine injection and urine.

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Publication details

The article was received on 14 Jul 2018, accepted on 03 Oct 2018 and first published on 04 Oct 2018


Article type: Paper
DOI: 10.1039/C8NA00090E
Citation: Nanoscale Adv., 2019, Accepted Manuscript
  • Open access: Creative Commons BY-NC license
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    Porous Tal Palm Carbon Nanosheet: Preparation, Characterization and Application for Simultaneous Determination of Dopamine and Uric Acid

    A. J. S. Ahammad, N. Odhikari, S. S. Shah, Md. M. Hasan, T. Islam, P. R. Pal , M. A. A. Qasem and Md. A. Aziz, Nanoscale Adv., 2019, Accepted Manuscript , DOI: 10.1039/C8NA00090E

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