Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 1, Pages 997-1004Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b14952
Keywords
SnS2; gas sensing ink; humidity-independent; flexible sensors; NH3 detection; NO2 detection; functional graphene
Funding
- National Natural Science Foundation of China [U1837203, 51872065]
- National Key Research and Development Program of China [2018YFA0702802]
- Natural Science Foundation of Heilongjiang Province of China [E2018030]
- Fundamental Research Funds for the Central Universities
- Shenzhen Science and Technology Program
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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.
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