Scheelite type Barium Tungstate Nanoparticles Decorated on Graphitic Carbon Nitride Nanocomposite for the Detection of Diphenylamine in Apple juice

Herein, a Barium tungstate (BaWO4) and Graphitic carbon nitride (GCN) based a new electrochemical sensor (BaWO4/GCN/GCE), for the detection of diphenylamine (DPA). Nearly oval-shaped BaWO4 was anchored on the GCN sheets by a worthwhile and simple hydrothermal route. Cyclic voltammetry (CV) and Differential pulse voltammetry (DPV) were used to scrutinize the electrochemical performance of DPA on BaWO4/GCN/GCE. The prepared sensor exhibited phenomenal electrocatalytic action towards the detection of DPA. Moreover, the BaWO4/GCN sensor exhibiting good sensitivity of 1.51267 mu A mu M-1 cm(-2) with the low detection limit (LOD) of 1 nM and a broader linear range from 0.001 to 533 mu M for DPA detection under the improved experimental conditions. Furthermore, the effect of storage duration on the BaWO4/GCN sensor's CV response reveals the improved stability. Owing to these extraordinary analytical advantages, the as-produced sensor was applied to analyse the DPA level in apple juice with satisfactory results.

Automated summary

A new electrochemical sensor (BaWO4/GCN/GCE) based on Barium tungstate and Graphitic carbon nitride was developed for the detection of diphenylamine (DPA). The sensor exhibited remarkable electrocatalytic activity and sensitivity, allowing for accurate detection of DPA in apple juice.