{"title":"Self-powered, highly selective and fast response time ammonia gas sensors based on an rGO/SnO2 nanocomposite","authors":"","doi":"10.1016/j.sna.2024.115963","DOIUrl":null,"url":null,"abstract":"<div><div>Improving the sensitivity and selectivity of ammonia gas sensors at room temperature is essential for the development of self-powered sensors to expand their operational range in various environments. The strategy employed in this study to achieve this goal involves combining reduced graphene oxide (rGO), known for its excellent electrical properties, with SnO<sub>2</sub>, which has been reported to have ammonia-sensing capabilities. For this purpose, the rGO-SnO<sub>2</sub> nanocomposite was synthesized using a two-step pyrolysis and chemical deposition method, and its ammonia gas sensing performance was evaluated. Structural characterization of the synthesized sample was conducted using XRD, BET, SEM, PL, EDX and FTIR techniques. The sensor's response to different concentrations of ammonia gas at room temperature was investigated, and the results showed a 5.2% response at 800 ppm and a low detection limit of 1.43 ppm for this gas. In addition to its high selectivity for ammonia gas, the sensor also demonstrated stability and repeatability.</div></div>","PeriodicalId":21689,"journal":{"name":"Sensors and Actuators A-physical","volume":null,"pages":null},"PeriodicalIF":4.1000,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sensors and Actuators A-physical","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0924424724009579","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
Improving the sensitivity and selectivity of ammonia gas sensors at room temperature is essential for the development of self-powered sensors to expand their operational range in various environments. The strategy employed in this study to achieve this goal involves combining reduced graphene oxide (rGO), known for its excellent electrical properties, with SnO2, which has been reported to have ammonia-sensing capabilities. For this purpose, the rGO-SnO2 nanocomposite was synthesized using a two-step pyrolysis and chemical deposition method, and its ammonia gas sensing performance was evaluated. Structural characterization of the synthesized sample was conducted using XRD, BET, SEM, PL, EDX and FTIR techniques. The sensor's response to different concentrations of ammonia gas at room temperature was investigated, and the results showed a 5.2% response at 800 ppm and a low detection limit of 1.43 ppm for this gas. In addition to its high selectivity for ammonia gas, the sensor also demonstrated stability and repeatability.
期刊介绍:
Sensors and Actuators A: Physical brings together multidisciplinary interests in one journal entirely devoted to disseminating information on all aspects of research and development of solid-state devices for transducing physical signals. Sensors and Actuators A: Physical regularly publishes original papers, letters to the Editors and from time to time invited review articles within the following device areas:
• Fundamentals and Physics, such as: classification of effects, physical effects, measurement theory, modelling of sensors, measurement standards, measurement errors, units and constants, time and frequency measurement. Modeling papers should bring new modeling techniques to the field and be supported by experimental results.
• Materials and their Processing, such as: piezoelectric materials, polymers, metal oxides, III-V and II-VI semiconductors, thick and thin films, optical glass fibres, amorphous, polycrystalline and monocrystalline silicon.
• Optoelectronic sensors, such as: photovoltaic diodes, photoconductors, photodiodes, phototransistors, positron-sensitive photodetectors, optoisolators, photodiode arrays, charge-coupled devices, light-emitting diodes, injection lasers and liquid-crystal displays.
• Mechanical sensors, such as: metallic, thin-film and semiconductor strain gauges, diffused silicon pressure sensors, silicon accelerometers, solid-state displacement transducers, piezo junction devices, piezoelectric field-effect transducers (PiFETs), tunnel-diode strain sensors, surface acoustic wave devices, silicon micromechanical switches, solid-state flow meters and electronic flow controllers.
Etc...