Band gap engineering of graphene oxide for ultrasensitive NO2 gas sensing. (15th April 2020)

• Record Type: Journal Article
• Authors: Park, Jisoo; Kim, Yeonhoo; Park, Seo Yun; Sung, Sae Jin; Jang, Ho Won; Park, Chong Rae
• Is Part Of: Carbon. Volume 159(2020)
• Page Start: 175
• Page End: 184
• Publication Date: 2020-04-15
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2019.11.063
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: We produced a graphene oxide (GO) based nitrogen dioxide (NO2 ) gas sensor with extremely low limit of detection (LOD), which is far below the WHO and EU annual standards. Based on the derived correlation among the band gap, adsorption energy, and sensing performance, we prepared semiconductive reduced GO (HGO) with simply modified acid washing process of traditional Hummers' method. HGO, prepared with dispersed state enables easy fabrication of sensing device by a simple drop casting process and showed great sensing performance when HGO showed band gap of semiconductor. This research is considered that opened a new route to preparing extremely sensitive NO2 gas sensors through very facile and cost effective processes. Graphical abstract: Image 1