Ozone detection in the ppt-level with rGO-ZnO based sensor
Abstract: Although several studies have explored the rGO-ZnO nanocomposites gas sensing properties towards many gases, only a few are devoted to ozone detection. This paper explores a novel synthesis procedure of rGO-ZnO nanocomposites based upon a two-step physical process. Namely, a reduction process of GO carried out using UV laser radiation followed by a deposition of ZnO nanoparticles on the rGO surface by RF-magnetron Sputtering. Our results demonstrate that the deposition of ZnO on the surface of the rGO film produces a stable and conductive material with a larger surface area. Consequently, this material is able to operate at high temperatures and exhibited a limit of detection (LOD) in the range of 100 ppt, while pure ZnO exhibited LOD in the vicinity of 1 ppb.
Author(s): de Lima, B.S.; Komorizono, A.A.; Silva, W.A.S.; Ndiaye, A.L.; Brunet, J.; Bernardi;, M.I.B.; Mastelaro, V.R.
Sensors and Actuators B: Chemical
Published: 1 July 2021, Volume 338, 129779
