Excellent Enzymeless Anti-Oxidant Sensor for Fruit Juice and Wine Using Nano Gold/Metal Selenide Urchins Decorated 2d-Composite

Schematic illustration of fabrication of Mo 3 Se 4 /β-Ni(OH) 2 /AuNSs electrode exhibits excellent electrocatalytic activity towards the phenolic sensor of GA in real samples (such as grapes juice and wine matrixs) • Metal content in Mo 3 Se 4 /β-Ni(OH) 2 /AuNS S acted as catalyst for phenol sensitivity. • Electrocatalyst has been constructed for trace phenol content in fruits. • LOD of the model phenol content ie., gallic acid (GA) reaches 5 nM level. • The engineered electrocatalyst shows excellent stability, which boost the signal amplification of GA. • Satisfactory accuracy of GA determination was achieved in real samples. There is a growing interest to develop electrochemical sensor for the quick detection of constituent especially the antioxidants in fruits. Here for the first time gold nanoparticles decorated on capacitance material like 2D-β-Ni(OH) 2 supported Mo 3 Se 4 urchins were prepared for selective phenol detection in the real sample like fruit juice and wine matrixes. Under optimal condition the Mo 3 Se 4 /β-Ni(OH) 2 /AuNSs modified electrode displays a wide linear range of 0.05 µM to 3 mM (R 2 = 0.9854) for gallic acid. Besides, this sensor exhibits the lowest detection limit of 5 nM (S/N = 3). Because of its ever-increasing requirement and simplicity, the present sensor can be commercialized and deployed for monitoring gallic acid in wine matrixes and fruit juices.