Preparation of polyaniline grafted graphene oxide–WO₃nanocomposite and its application as a chromium(<scp>iii</scp>) chemi-sensor

Polyaniline-grafted-GO@WO₃was prepared and deposited on a Ag electrode with conducting binders to give a sensor with a fast selective response for Cr³⁺in the liquid phase. The sensitivity and detection limit are ∼4.4251 mA mM⁻¹cm⁻²and 0.031 ± 0.010 nM.