Chemically modified graphene films for high-performance optical NO2 sensors

• DOI: 10.1039/c6an00552g
• Publication Date: 2016-05-19T21:27:19Z
• Authors: Fei Xing; Shan Zhang; Yong Yang; Wenshuai Jiang; Zhibo Liu; Siwei Zhu; Xiaocong Yuan
• Keywords: 02 engineering and technology; 0210 nano-technology

Various graphene-based gas sensors that operate based on the electrical properties of graphene have been developed for accurate detection components. However, electronic are unsafe under explosive atmospheres and sensitive to electromagnetic interference. Here, a novel optical sensor NO2 is established surface chemical modification high-temperature-reduced oxide (h-rGO) films with sulfo groups. Sulfo group-modified h-rGO (S-h-rGO) thickness several nanometers exhibit excellent performance in at room temperature atmospheric pressure polarization absorption effect graphene. Initial slope analysis S-h-rGO indicates it has limit 0.28 ppm response time 300 s sensing. Furthermore, also possesses advantages good linearity, reversibility, selectivity, non-contact operation, low cost safety. This potential serve as general platform selective variety gases high performance.