Preparation Electroanalysis Based on Sensor Nanosheets G-C3N4/CPE for Determination of Amount Hg2+ ion in Water Samples by Square Wave Anodic Stripping Voltammetry (SWASV) Method

Document Type : Research Paper

Authors

Department of Chemistry, Omidiyeh Branch, Islamic Azad University, Omidiyeh, Iran.

Abstract

This  study  describes  the  construction of  a  new  electrochemical  sensor  and  applies  it  for  the determination  of  Hg2+ ion.  This  sensor  was  prepared  using  new  nanographene  on  G-C3N4 nanosheets.  Although  the  other  methods  (gas  or  liquid  chromatographic,  electrophoresis,  flow injection) for measuring Hg2+ ion have advantages such as excellent accuracy and reproducibility, it has  limitations  such  as  long-time  measure,  high  equipment  cost.  Here,  we  report  the  use  of  an electrochemical approach for analytical determination of Hg2+ ion that takes 120 s. The calibration curve was linear in the range of (0.03 to 33.0 nM). The current response was linearly proportional to the Hg2+
ion concentration with a R2~ 0.999. We demonstrated a sensitivity a limit of detection of (0.093  nM).  Finally,  Sensor  nanosheets  G-C3N4/CPE  has  been  successfully  applied  for  the determination of Hg2+ ion in different kind of water samples. The method introduced to measure Hg2+ ion in real samples such as water samples was used and can be used for other samples. 

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