Graphene based nanomaterials have shown interesting applications in electrochemical sensors due to its superb electron transfer properties and excellent electrochemical catalytic activity. Thiourea derivative is known to serve as heavy metal extractants because of their complexation capacity with various metals. Based on the unique electronic properties of reduced graphene oxide (rGO) as well as the selective interaction between bis-thiourea (BT) derivative with Cu(II) ions, a novel electrochemical sensor for the detection of Cu(II) ions using poly(n-butyl acrylate)-graphene-(bis)thiourea [poly(nBA)-rGO-BT] modified electrode was proposed. The response current of the prepared electrochemical Cu(II) ions sensor was measured by differential pulse voltammetry(DPV). The effects of the composition of bis-thiourea derivative, accumulation potential, and accumulation time on the Cu(II) ions sensing properties (response) of the sensors were investigated to determine the optimal conditions for detecting Cu(II) ions in water. Other parameters such as pH, linear range, repeatability, stability and interference studies which influence the response of the measurement were optimized for the copper determination. The utilization of poly(nBA)-rGO-BT composite film has enhanced the performance of the electrochemical copper sensor in terms of broader detection range, lower detection limit, and favorable long-term stability. The modified electrode was successfully applied for the determination of Cu(II) ions in water samples.<br/>

Electrochemical determination of copper ions in water using polyacrylic-graphene-thiourea modified electrode

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.