Cobalt oxide-based nanomaterial for electrochemical sensor applications: A mini review

Amongst the extended list of metal oxides, Co3O4 has gained envisioned attention in various technological fields. It has a proven record of promising material in optical, optoelectronics, sciences, engineering, medicines and biological fields of studies. Co3O4 is a promising candidate due to its large surface-to-volume ratio, simple preparation methods, higher well-defined electrochemical redox activity, high theoretical capacity, low cost, and stable chemical states. Co3O4 has been used in various applications such as fuel cells, photoelectrochemical water splitting, solar cells, supercapacitors, batteries and electrochemical sensors due to its applicability in various fields. It has shown promising outcomes as an electrochemical sensor in various areas such as in the detection of water contamination, as physiological molecule detectors etc. this mini-review summarizes the fields of contaminated water, as fuel and also in the physiological system.