In-situ Immobilization of a Polyoxometalate Metal-Organic Framework (NENU-3) on Functionalized Reduced Graphene Oxide for Hydrazine Sensing

Main observation and conclusion Detection of hydrazine originated from electrochemical media has recently gained considerable attention in the sensing field. Herein, to improve electron transfer capacity, a polyoxometalate metal-organic framework (POMOF, NENU-3) is in-situ nucleated onto the carboxyl functionalized reduced graphene oxide (CFG) (NENU-3/CFG, abbreviation N3/CFG). The N3/CFG supported onto carbon cloth electrodes (CCEs) has been investigated for hydrazine detection. The amperometric results display that the POMOF/CFG to hydrazine has a broad linear range (0.09—362.5 μmol/L) and low detection limit (24 nmol/L). In addition, the POMOF/CFG-based sensors possess good anti-interference capability, boosted stability and feasibility. Furthermore, when applied to the detection of practical samples, acceptable relative recoveries of 96.26%—107.30% are obtained.