High performance room temperature NO2 sensors based on reduced graphene oxide-multiwalled carbon nanotubes-tin oxide nanoparticles hybrids

Abstract

A facile and effective strategy has been successfully developed to synthesize reduced graphene oxide-multiwalled carbon nanotubes-tin oxide nanoparticles (rGO-CNT-SnO2) hybrids by hydrothermal method. The combined characterizations of X-ray diffraction, Raman spectrum and Transmission electron microscopy were used to characterize the samples thus obtained, indicating the successful preparation of rGO-CNT-SnO2 hybrids. A room temperature NO2 sensor was fabricated by dropping the dispersion of rGO-CNT-SnO2 hybrids on the surface of ceramic substrate previously printed Au electrodes. Most importantly, the sensor based on rGO-CNT-SnO2 hybrids shows high response, fast response and recovery rate, high selectivity and good stability, which are much better than NO2 sensors based on pure rGO and rGO-SnO2 hybrids.