Hydrothermal Synthesis of Zr‐Amino Terephthalate and its Composite with MWCNTs as a Novel Electrode Material in Nitrite Quantification

Abstract

A simple and greener electrochemical sensing platform towards nitrite measurement using amine modified Zr‐terephthalate and MWCNTs has been demonstrated. The characterization of the composite material has been carried out using spectroscopic and voltammetric techniques. The composite material overcomes the inherent drawbacks of MOFs like lower conductivity and stability in aqueous medium. The MWCNTs/Zr−ATA composite modified electrode showed better electrocatalytic activity in nitrite quantification with good linearity in the concentration range 2–440 μM with detection limit 0.22 μM and sensitivity of 0.657 μA μM−1 cm−2. The fabricated electrode has been applied to quantify nitrite from root nodule samples.

Intergradation of UiO‐66 Nanoparticles with Expanded Graphite for Electrocatalytic Determination of Nitrite and L‐Cysteine

“…As nitrite concentrations exceed 13.15 m m , the sensitivity for nitrite detection deteriorates, probably due to the adsorption of intermediates on the active sites of a UiO‐66/EG/GCE during the nitrite oxidation process. The observed LOD and linear range for nitrite detection at UiO‐66/EG/GCE was superior than that of other reported modified electrodes ( Table 1 [ 48–53 ] ).…”