Reduced Graphene Oxide-Supported Hybrid Composites for Electrochemical-Sensing Applications

This chapter reviews the recent progress and future perspectives in the detection of nitrite. The nitrite ions (NO2−) are widely employed as a highly efficient preservative in food and drink industries. The NO2− discharged in environment could have venturous impact on the human health as well as ecosystem. Thus the sensitive and selective detection of NO2− is of a great significance due to its potential toxicity. Although conventional methods have been applied for the detection of NO2−, electrochemical approach has received greater attention. The detection performance in the electrochemical approach can be influenced by the presence of electrode modifiers. In previous years, numerous electrode materials such as polymers, metal oxides, metal carbides/nitrides, reduced graphene oxide, and hybrid composite have been employed for electrochemical sensing applications. In this chapter, we described the surface modification of working electrode and recent progress in the electrode modifiers, especially reduced graphene oxide-supported hybrid composites, for the sensing of NO2−.