Abstract
In this paper, we report the application of Bougainvillea glabra flower extract as a green-reducing agent for the reduction of chemically prepared graphene oxide (GO). The removal of oxygen-containing functional groups after reduction of GO was due to the presence of phenolic compounds in the flower extract of Bougainvillea glabra. Towards the sensing of Pb2+, a simple drop-casting technique was adopted to fabricate the sensing element by modifying the surface of screen-printed carbon electrode (SPCE) with rGO-nafion nanocomposite. Differential pulse voltammetry was employed as an electroanalytical technique to study the sensing capability of the proposed electrode for different concentrations of Pb2+. The fabricated SPCE exhibited a low limit of detection of 0.05 nM toward Pb2+ with an improved sensitivity of 25.273 µA nM−1 over a linear range of 0.05–8.67 nM.
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