Portable device for acetone detection based on cataluminescence sensor utilizing wireless communication technique

• Published in: Sensors and actuators. B, Chemical Vol. 257; pp. 451 - 459
• Main Authors: Shi, Guolong, He, Yigang, Luo, Qiwu, Li, Bing, Zhang, Chaolong
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.03.2018; Elsevier Science Ltd
• Subjects: Acetone; Cataluminescence; Communications systems; Contaminants; Data collection software; Embedded technique; Hydrogen sulfide; Linearity; Microspheres; Noise intensity; Pattern recognition; Portable equipment; Recovery time; Response time; Sensor; Sensors; Wireless communication; Wireless communications; Wireless communication; Embedded technique; Data collection software; Pattern recognition; Cataluminescence; Sensor
• ISSN: 0925-4005; 1873-3077
• DOI: 10.1016/j.snb.2017.10.154

•In our study, sensor system based on CTL has been selected as powerful tool for harmful gas detection. Ag-coated Fe3O4@TiO2 microspheres were successfully synthesized which would improve the contact opportunity with gas analytes. Ag deposited on Fe3O4@TiO2 surfaces enhanced the photocatalytic activity of Fe3O4@TiO2. The excellent material was used as CTL sensing material for acetone vapor detection during our study.•Moreover, when other materials such as coral-like TiO2/SnO2 nanoparticles materials were used, the same sensor system was selective to benzene and toluene gas, when Zn-doped SnO2 composite were used, the sensor system was selective to sulfur hexafluoride. The excellent sensing properties including improved sensitivity, selectivity and stability proved this sensor system to be a promising candidate for detecting gas contaminants.•Except for the computer server, other physical devices are located in the detection site. The weight of the detection equipment is not more than 15kg, the volume was about 0.6m3, and it can be moved to different test site conveniently.•In Fig. 12(b), the CTL signal of H2S changed with reaction temperature was investigated. It was believed that 220°C should be the optimal reaction temperature for H2S detection which was lower than Zhenyu Zhang and co-workers' work [39]. Portable sensor system was constructed for detection of acetone vapor based on the cataluminescence (CTL) theory. Excellent microspheres were prepared successfully which increased the contact probability with vapors. The instrument architecture, optimal experiment conditions and measurement characteristics were discussed in detail. The results showed the CTL sensor instrument exhibited excellent CTL properties including visible intensity, high signal/noise (S/N) values, short response time (within 2s) and recovery time (within 3s). The sensor instrument covered a linear test range from 5ppm to 2500ppm, while the sensor showed non-linearity when concentration ranged from 2500ppm to 8000ppm. Furthermore, the sensor system showed outstanding selectivity to acetone compared with other ten kinds of common vapors. Moreover, the CTL sensor also showed an excellent response for H2S, the CTL performance of H2S under different wavelength and temperature was also discussed. The excellent sensing and online detecting properties proved this sensor instrument to be an excellent candidate for real-time gas contaminant detection. Finally, the sensing control processes and monitoring software interface was also presented.