High Sensitivity, Humidity-Independent, Flexible NO2 and NH3 Gas Sensors Based on SnS2 Hybrid Functional Graphene Ink

Yifan Huang; Weicheng Jiao; Zhenming Chu; Siyong Wang; Liuyang Chen; Xinmiao Nie; Rongguo Wang; Xiaodong He

doi:10.1021/acsami.9b14952

High Sensitivity, Humidity-Independent, Flexible NO₂ and NH₃ Gas Sensors Based on SnS₂ Hybrid Functional Graphene Ink

ACS Appl Mater Interfaces. 2020 Jan 8;12(1):997-1004. doi: 10.1021/acsami.9b14952. Epub 2019 Dec 26.

Authors

Yifan Huang¹, Weicheng Jiao¹, Zhenming Chu¹, Siyong Wang¹, Liuyang Chen¹, Xinmiao Nie¹, Rongguo Wang¹, Xiaodong He^{1

2}

Affiliations

¹ National Key Laboratory of Science and Technology for National Defence on Advanced Composites in Special Environments , Harbin Institute of Technology , Harbin 150086 , China.
² Shenzhen STRONG Advanced Materials Research Institute Co., Ltd , Shenzhen , Guangdong 518000 , China.

PMID: 31825202
DOI: 10.1021/acsami.9b14952

Abstract

Here, a high sensitivity gas sensing ink based on sulfonated rGO (S-rGO) decorated with SnS₂ is synthesized for room temperature NO₂ and NH₃ detection. This sensing ink demonstrated an excellent sensitivity to ppb-level NO₂ (17% response to 125 ppb) and sub-ppm-level NH₃ (11% response to 1 ppm). The unique absorption properties of SnS₂ improve the sensitivity of S-rGO 4.2 and 55 times to NO₂ and NH₃, respectively. Besides, the superhydrophobicity of the SnS₂ endows the sensor with exceptional immunity to high relative humidity (RH). Furthermore, the sensors exhibit negligible degradation to NO₂ and less than 15% degradation to NH₃ in a wide range of RH from 30 (ambient humidity) to 90%. More importantly, the obtained full-written ink can be applied to common substrates, such as glass, clothes, and paper, and maintain excellent performance after being bent and twisted by 180°.

Keywords: NH3 detection; NO2 detection; SnS2; flexible sensors; functional graphene; gas sensing ink; humidity-independent.