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Development of 3-methoxyanaline sensor probe based on thin Ag2O@La2O3 nanosheets for environmental safety

Abstract

Herein, a facile wet chemical method was used to synthesize the doped semiconductor Ag2O@La2O3 nanosheets (NSs) in alkaline medium. Characterization tools such as Ultraviolet/Visible Spectroscopy (UV/Vis.), Fourier Transform Infrared Spectroscopy (FTIR), Powder X-ray Diffractometer (XRD), X-ray photoelectron spectroscopy (XPS) in addition to Field Emission Scanning Electron Microscope (FESEM) equipped with X-ray Energy Dispersive Spectroscopy (XEDS) were used for the optical, elemental, morphological, and structural characterization of Ag2O@La2O3 NSs. Glassy carbon electrode (GCE) was modified by the fabrication of thin layer of Ag2O@La2O3 NSs with 5% ethanolic conducting binder onto its flat surface for the development of selective as well as ultra-sensitive 3-methoxyanaline (3-MA) electrochemical sensor. A simple electrochemical technique was used for the first time to detect the 3-MA in an electrochemical approach by using the newly designed Ag2O@La2O3 NSs/Nafion/GCE as a selective 3-MA electrochemical sensor in an aqueous system. So, Electrochemical responses along with higher sensitivity, large-dynamic range and long-term stability towards 3-MA were observed by electrochemical approach. The calibration curve was found linear over a wide linear dynamic range (LDR) of 3-MA concentration (0.1 nM – 0.1 mM). Limit of detection (LOD) at signal to noise ratio of 3 (S/N 3), limit of quantitation (LOQ) and sensitivity were found to be 0.085 ± 0.002 nM, 0.28 ± 0.02 nM and 0.0110 µAµM-1cm-2, respectively, from the gradient of the calibration plot. Hence, it is a new and well organized way for the development of 3-MA electrochemical sensor based on Ag2O@La2O3 NSs modified GCE and significantly can be applied for the real sample analysis for the safety of green environment. As far as we know, this report is the maiden study on the development of highly sensitive 3-MA sensor based on Ag2O@La2O3 NSs/Nafion/GCE by using reliable electrochemical technique.

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Publication details

The article was received on 23 Jan 2019, accepted on 13 Feb 2019 and first published on 13 Feb 2019


Article type: Paper
DOI: 10.1039/C9NJ00415G
Citation: New J. Chem., 2019, Accepted Manuscript

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    Development of 3-methoxyanaline sensor probe based on thin Ag2O@La2O3 nanosheets for environmental safety

    M. M. Rahman, T. A. Sheikh, A. M. Asiri and M. R. Awual, New J. Chem., 2019, Accepted Manuscript , DOI: 10.1039/C9NJ00415G

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