Ag Functionalized In(2)O(3) Derived From MIL-68(In) as an Efficient Electrochemical Glucose Sensor

In this study, Ag@In(2)O(3) modified nickel foam (NF) was reported for its role as a non-enzymatic glucose sensor. Ag@In(2)O(3) was prepared by a simple two-step method; preparation of a metal-organic framework (MOF) MIL-68(In) by solvothermal method, entrapment of Ag + by adding AgNO(3) then drying it for 2 h to complete the entrapment process and subsequent calcination at 650°C for 3 h. The Ag@In(2)O(3) modified NF was employed as a non-enzymatic glucose sensor to determine glucose concentrations in an alkaline medium. Two linear ranges were obtained from Ag@In(2)O(3) modified electrode, i.e., 10 μM to 0.8 mM and 0.8–2.16 mM with a sensitivity of 3.31 mA mM(−1) cm(−2) and 1.51 mA mM(−1) cm(−2) respectively, with a detection limit of 0.49 µM. Ag@In(2)O(3) modified NF exhibited high selectivity for glucose, among other interfering agents.