Reduced graphene oxide coated poly-methyl methacrylate beads based thermoplastic polyurethane nanocomposites for gas sensing applications

We have fabricated, reduced graphene oxide (rGO) coated poly methyl methacrylate (PMMA) based thermoplastic polyurethane (TPU) nanocomposites for NO2 gas sensing. The rGO-coated PMMA beads and MWCNTs were incorporated into the TPU matrix in different concentrations by melt mixing. The characterization was done to confirm the preparation of the nanocomposites. The rGO-coated PMMA-TPU nanocomposites exhibit excellent electrical conductivities and efficient NO2 gas sensing. The developed sensor can sense NO2 at room temperature with the highest response time of 19 s and an average response time of 23.67 s. The sensor is recovered within 31.4 s and has a limit of detection of 9.51 ppm.