The curious case of polyaniline-graphene nanocomposites: a review on their application as exceptionally conductive and gas sensitive materials

This review presents a brief overview of the electrical and gas-sensor properties of polyaniline (PANI) and graphene-based nanocomposites, their application as gas detection materials, and their underlying sensing mechanisms. Several studies have shown that graphene-based PANI gas sensors perform remarkably well at ambient temperatures, are energy efficient, and are inexpensive. The electrical and gas sensing properties of PANI/graphene nanocomposites offer improved responsiveness, durability, and other detection capabilities in sensor-based devices at room temperature. Moreover, the electrical conductivity and gas sensor properties may be controlled by the synthesis methods and the form and type of graphene. This review provides a new framework for the development of new nanomaterials based on PANI/graphene, which will advance their development and industrialization in the environment.