Surfactant-assisted graphene oxide/methylaniline nanocomposites for lead ionic sensor development for the environmental remediation in real sample matrices

  • A. A. P. KhanEmail author
  • A. Khan
  • A. M. Asiri
  • M. M. Alam
  • M. M. Rahman
  • M. Shaban
Original Paper


Graphene oxide/methylaniline (GO/MA) nanocomposites (NCs) were synthesized by an in situ inverse microemulsion polymerization method. The characterization of nanocomposites is done by scanning electron microscope (SEM), X-ray diffraction (XRD) and thermogravimetric analysis (TGA) methods. In addition, an efficient chemical sensor probe was fabricated with flat glassy carbon electrode (GCE) by coating with thin layer of synthesized GO/MA NCs. Then the sensor was applied for the selective detection of lead (Pb+2) ion in an aqueous phase. The sensor performance such as sensitivity (20.56 µA mM−1 cm−2) was calculated from the slope of the calibration curve. The linear dynamic range (LDR: 0.1 nM–0.01 M) was calculated on the maximum linearity line from the calibration plot. The detection limit (DL: 50.0 ± 2.5 pM) was also calculated from the slope of the calibration plot by considering of 3 N/S (signal-to-noise ratio of 3). This novel electrochemical approach introduced a reliable and efficient route to detect the heavy metal ions as selective sensor for the safety of medical, biochemical and environmental fields in broad scales.


GO/MA nanocomposites Electrochemical method Sensitivity Pb+2 cationic sensor Environmental remediation 



The authors wish to thank all who assisted in conducting this work.


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Copyright information

© Islamic Azad University (IAU) 2019

Authors and Affiliations

  1. 1.Center of Excellence for Advanced Materials Research and Chemistry Department, Faculty of ScienceKing Abdulaziz UniversityJeddahSaudi Arabia
  2. 2.Department of Chemical Engineering and Polymer ScienceShahjalal University of Science and TechnologySylhetBangladesh
  3. 3.Nanophotonics and Applications Lab, Physics Department, Faculty of ScienceBeni-Suef UniversityBeni-SuefEgypt

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