Metal‐Organic Gel‐Derived Co/CoO/Co₃O₄ Composite for the Electrochemical Detection of Diethylstilbestrol

Abstract

A novel three‐phase composite of Co/CoO/Co3O4 is synthesized through straightforward calcination treatment towards cobalt‐based metal‐organic gel (Co MOG) precursor, which is constructed with the metal source of cobalt chloride and organic ligand of 4, 4', 4”‐((1, 3, 5‐triazine‐2, 4, 6‐triyl) tris (azanediyl)) tribenzoic acid at room temperature. The morphology, structure and composition of the derived Co/CoO/Co3O4 is confirmed through scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder X‐ray diffraction (XRD) and X‐ray photoelectron spectrums (XPS). Furthermore, the composite of Co/CoO/Co3O4 is employed as electrode modified material with the excellent electrochemical performances of accelerating the electron transfer and boosting the electrode interface reaction. As a proof of concept, the electrochemical redox behaviors of diethylstilbestrol (DES) have been systemically investigated at the modified electrode interface and the established analytical approach for DES with the broad linear range and satisfied recovery. This work not only provided a facile approach to obtain electrode material with excellent electrochemical performance but also enriched the application of MOG materials in the electrochemical field.

Synergistic effect of adsorption and electrocatalysis of CoO/NiO heterostructure nanosheet assembled nanocages for high-performance lithium–sulfur batteries

“…The Co and Ni elements of CoO/NiO@C-NC have two valence states of +2 and +3. The Co 2p 3/2 spectrum of CoO/NiO@C-NC exhibits two peaks at 781.8 and 780.2 eV attributed to the peaks of Co 2+ and Co 3+ , respectively 57,58 (Fig. 3b).…”

Metal–organic gels and their derived materials for electrochemical applications

“…Additionally, MOG-based electrodes provide a unique platform for enhancing the sensitivity and selectivity for specific target analytes. The use of MOGs for electrochemical sensing has been applied to metal ions 201,202 and small molecules such as diethylstilbestrol, 203 glucose, 204 and cholesterol. 204 Considering good mass transfer in the hierarchical porosity of MOGs, MOGs are promising electrode materials for detecting large molecules.…”

Hierarchical porous metal–organic gels and derived materials: from fundamentals to potential applications

“…The transformation into MOG-derived materials to improve their conductivity and electrocatalytic properties while retaining their textural properties is often found in the literature. 408,409…”