Flexible Low-Temperature Ammonia Gas Sensor Based on Reduced Graphene Oxide and Molybdenum Disulfide

Chemosensors

Xiaoyu Yu¹  Zhe Ren²  Tianming Song²  Haodong Niu²  Yunbo Shi²  Tian Wang²  Bolun Tang² 

[1] School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou 519000, China;The Higher Educational Key Laboratory for Measuring & Control Technology and Instrumentations of Heilongjiang Province, Harbin University of Science and Technology, Harbin 150080, China;

关键词: flexible electronics;    micro-electro-mechanical system;    reduced graphene oxide;    NH₃ gas sensor;    molybdenum disulfide;   

DOI  :  10.3390/chemosensors9120345

来源: DOAJ

【 摘 要 】

Owing to harsh working environments and complex industrial requirements, traditional gas sensors are prone to deformation damage, possess a limited detection range, require a high working temperature, and display low reliability, thereby necessitating the development of flexible and low-temperature gas sensors. In this study, we developed a low-temperature polyimide (PI)-based flexible gas sensor comprising a reduced graphene oxide (rGO)/MoS₂ composite. The micro-electro-mechanical system technology was used to fabricate Au electrodes on a flexible PI sheet to form a “sandwiched” sensor structure. The rGO/MoS₂ composites were synthesized via a one-step hydrothermal method. The gas-sensing response was the highest for the composite comprising 10% rGO. The structure of this material was characterized, and a PI-based flexible gas sensor comprising rGO/MoS₂ was fabricated. The optimal working temperature of the sensor was 141 °C, and its response-recovery time was significantly short upon exposure to 50–1500 ppm NH₃. Thus, this sensor exhibited high selectivity and a wide NH₃ detection range. Furthermore, it possessed the advantages of low power consumption, a short response-recovery time, a low working temperature, flexibility, and variability. Our findings provide a new framework for the development of pollutant sensors that can be utilized in an industrial environment.

【 授权许可】

Unknown