Porous reduced graphene oxide (rGO)/WO₃ nanocomposites for the enhanced detection of NH₃ at room temperature

Abstract

Incorporation of reduced graphene oxide (rGO) modifies the properties of semiconducting metal oxide nanoparticles and makes it possible to tune the surface area and pore size to optimum values, which in turn improves their gas sensing properties.

Controlled synthesis of ultrathin MoS2nanoflowers for highly enhanced NO2sensing at room temperature

“…8(c). 52,53 Namely, we took 15 experimental data points at the transient response baseline before exposing to NO 2 gas. The h-order polynomial t of the 15 data points, as shown in Fig.…”

Applications of Ceramic/Graphene Composites and Hybrids

“…The gas sensor was fabricated by coating a ceramic tube with the composite and corresponding wiring. By simple sonication and using spin coating methods, the fabricated WO 3 /rGO nanocomposite sensor (with 5 wt.% rGO) showed excellent sensing characteristics for NH 3 detection as compared to the single WO 3 sensor, attributed to the pore distribution achieved, the higher specific surface area and the occurrence of multiple p-n heterojunctions [ 164 ]. Nanocomposites of WO 3 /rGO obtained by hydrothermal synthesis and spin coating on interdigitated alumina substrates have also shown very good capabilities for the sensing of acetylene, particularly for the GO concentration of 1 wt.% [ 165 ] that showed a low detection limit of 1 ppm, stability and lower working temperature.…”

A Review on Functionalized Graphene Sensors for Detection of Ammonia

“…This results in a complex fabrication process, high power consumption, high cost, and the size increase in the overall device. It is interesting that the hybrid of metal oxides with graphene can significantly improve the sensing performance, particularly, the selectivity and response/recovery times at room temperature [ 93 , 94 ].…”