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A Multi-functional NO2 gas monitor and Self-Alarm based on Laser-Induced graphene.
- Source :
-
Chemical Engineering Journal . Jan2022, Vol. 428, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
-
Abstract
- Laser engraving is carried out on the both sides of PI film to achieve constant temperature gas monitor and early automatic self-alarm. [Display omitted] • The LIG IDEs serve gas sensor, and rectangular LIG is usable in dual-working mode. • The rectangular LIG provides a constant working temperature under a DC voltage. • The NO 2 monitor with heating condition overcomes the inability to desorb at RT. • Let the device emit an acoustic alarm once NO 2 concentration is beyond threshold. The increasingly serious air pollution problem makes the development of high-performance gas monitoring system extremely urgent. Especially for nitrogen dioxide (NO 2), which is harmful to both people and the environment. The combination of reliable real-time monitoring and early warning is of great significance yet less study. Here, we designed a laser-induced graphene (LIG)-based multi-functional NO 2 monitor and self-alarm (MMSA), in which a rectangle area is used as a dual-functional module to realize high-performance temperature condition and acoustic alarm by applying direct/alternating current voltage excitation source. The molybdenum disulfide (MoS 2) sensitive material works in concert with the LIG interdigital electrodes (IDEs), and the gas monitor achieves high sensitivity (86.81% for 5 ppm, and 22.90% for 250 ppb) and excellent recoverability, aided by the good electrothermal property of LIG, overcoming the dilemma of poor sensing performance of MoS 2 at room temperature (RT). To top it off, the thermoacoustic effect of the LIG could bring about an intuitional sound signal, and a proof-of-concept demonstrates the timely acoustic warning response of the MMSA to exceeded NO 2 concentrations. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13858947
- Volume :
- 428
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Journal
- Publication Type :
- Academic Journal
- Accession number :
- 153866537
- Full Text :
- https://doi.org/10.1016/j.cej.2021.131079