• 文献标题:   A Multi-functional NO2 gas monitor and Self-Alarm based on Laser-Induced graphene
  • 文献类型:   Article
  • 作  者:   PENG ZR, TAO LQ, ZOU SM, ZHU CC, WANG GY, SUN H, REN TL
  • 作者关键词:   laserinduced graphene, mos2, gas sensor, no2 monitor, acoustic alarm, multifunctional integration device
  • 出版物名称:   CHEMICAL ENGINEERING JOURNAL
  • ISSN:   1385-8947 EI 1873-3212
  • 通讯作者地址:  
  • 被引频次:   19
  • DOI:   10.1016/j.cej.2021.131079 EA JUL 2021
  • 出版年:   2022

▎ 摘  要

The increasingly serious air pollution problem makes the development of high-performance gas monitoring system extremely urgent. Especially for nitrogen dioxide (NO2), 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 NO2 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 (MoS2) 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 MoS2 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 NO2 concentrations.