ZIF-67/Co3O4/TiO2 Electrode Materials for Highly Sensitive Nonenzymatic Lactic Acid Sensors and High Performance Supercapacitors

High-performance electrode materials play an important role in the development of electrochemical sensors and supercapacitors. The photoelectric chemical sensor has good sensitivity and specificity and can be used for microdetection. It has a wide measuring range, simple structure, and low cost, and can be used for continuous online analysis. In this study, a composite electrode composed of Co3O4 and TiO2 attached to a metal frame composed of cobalt oxides was prepared by a simple hydrothermal method. Transition metal oxides have a variety of valence states, have the characteristics of high conductivity and multiple active sites, and have excellent electrochemical activity and performance. The ZIF-67/Co3O4/TiO2 sensor selectively detects lactate with a sensitivity of
$3210 \mu $
AmM
$^{-{1}}$
cm
$^{-{2}}$
. The ZIF-67/Co3O4/TiO2 electrode material structure is also suitable for supercapacitors, which can achieve high energy density, high power density, low noise, and high reliability. These excellent properties validate the reliability of the material design, and the ZIF-67/Co3O4/TiO2 structure has great potential as a multifunctional material for electrochemical sensing and energy storage.