Preparation of polyaniline grafted graphene oxide–WO 3 nanocomposite and its application as a chromium( iii ) chemi-sensor

Polyaniline-grafted-GO@WO 3 was prepared and deposited on a Ag electrode with conducting binders to give a sensor with a fast selective response for Cr 3+ in the liquid phase. The sensitivity and detection limit are ∼4.4251 mA mM −1 cm −2 and 0.031 ± 0.010 nM.