ABSTRACT
The cerium oxide nanoparticles (CNPs) synthesis has gained interest as the nanoparticles (NPs) exhibit properties such as catalytic activity, environment friendliness, stability, the transition of states property, etc. These properties make CNP to be a potent applicant in sensing purposes along with other applications like industrial, material science, etc. In controlling the parameters like shape and dimension of the NPs, physical and chemical methods remain helpful, but the green synthesis of the NPs is preferable in comparison to other physical and chemical synthesis methods due to its low-cost, nonuse of toxic materials, etc. Henceforth, this chapter reviews recent green synthesis methods of CNPs such as plant-mediated, nutrient-mediated, fungus-mediated, and polymer-mediated methodologies. The CNP NPs characterize the redox reaction sites with oxygen deficiencies that result in it being highly conductive and making it to be suitably used in an electrochemical sensor. Hence, as a potent nanomaterial in the field of electrochemical sensing, this chapter briefs on their recent applications to electrochemical sensing of glucose, hydrogen peroxide, lactone, formalin, dopamine, cholesterol, uric acid, etc.
