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Pure and 0.5, 1, 2, 5, and 10 at% of Mo-doped Co3O4 yolk-shell spheres were synthesized by ultrasonic spray pyrolysis of droplets containing Co nitrate, ammonium molybdate, and sucrose and their gas sensing characteristics to 5 ppm trimethylamine (TMA), ethanol, p-xylene, toluene, ammonia, carbon monoxide, and benzene were measured at 225-325℃. The sensor using pure Co3O4 yolk-shell spheres showed the highest response to p-xylene and very low response to TMA at 250℃, while the doping of Mo into Co3O4 tended to increase the overall responses of gas sensors. In particular, the sensor using 5 at% Mo-doped Co3O4 yolk-shell spheres exhibited the high response to TMA with low cross-responses to other interfering gases. The high response and selectivity of Mo-doped Co3O4 yolkshell spheres to TMA are attributed to the electronic sensitization by higher valent Mo doping and acid-base interaction between TMA and Mo components.
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참고문헌 (18)
참고문헌 신청
S. Sadok / 1996 / Determination of trimethylamine in fish by flow injection analysis / Anal. Chim. Acta 321:69~74
G. M. Bota / 2006 / Direct detection of trimethylamine in meat food products using ion mobility spectrometry / Talanta 68(3):629~635
H. U. Rehman / 2011 / Fish odour syndrome / Postgrad. Med. J. 32:115~130
Z. H. Endre / 2011 / Breath ammonia and trimethylamine allow real-time monitoring of haemodialysis efficacy / Physiol. Meas. 32(1):115~130
서준민 / 2018 / Synthesis of Nanoporous Metal Oxide Films Using Anodic Oxidation and Their Gas Sensing Properties / 센서학회지 27(1):13~20
G. M. Bota / 2006 / Direct detection of trimethylamine in meat food products using ion mobility spectrometry / Talanta 68(3):629~635
H. U. Rehman / 2011 / Fish odour syndrome / Postgrad. Med. J. 32:115~130
Z. H. Endre / 2011 / Breath ammonia and trimethylamine allow real-time monitoring of haemodialysis efficacy / Physiol. Meas. 32(1):115~130
서준민 / 2018 / Synthesis of Nanoporous Metal Oxide Films Using Anodic Oxidation and Their Gas Sensing Properties / 센서학회지 27(1):13~20
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