期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 254, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2020.123540
关键词
Ethylene sensor; Cerium oxide; Tin oxide; Fruit ripeness monitoring
资金
- National Science and Technology Department Agency (NSTDA)
- Thailand Graduate Institute of Science and Technology (TGIST) [TG-44-23-61-073M]
- National Research Council of Thailand (NRCT)
- Nanoscience and Nanotechnology program, Faculty of Science, Maejo University
- Graduate School, Maejo University, Thailand
- Materials Science Research Center, Faculty of Science, Chiang Mai University, Thailand
- Thailand Research Fund [RTA6180004]
CeOx-SnO2 nanocomposites (NCs) with different Ce:Sn compositions of 0:100, 20:80, 25:75, 33:67, 50:50 and 100:0 were synthesized via a two-reactant co-precipitation method. The phase, morphology, particles size, elemental composition and chemical state of as-prepared CeOx-SnO2 nanoparticles (NPs) were characterized by X-ray diffraction, nitrogen adsorption, electron microscopy and X-ray spectroscopy. The results revealed that the highly crystalline solid solution phases structure of CeOx-SnO2 were formed exhibiting approximately round morphologies with average particles sizes of similar to 5-20 nm. The sensor properties towards ethylene gas were characterized in terms of response, response times, stability and selectivity. The gas-sensing data showed that the addition of CeOx to SnO2 provided significant enhancement of ethylene response and the CeOx-SnO2 NPs (Ce:Sn = 33:67) offered the highest response of 5.18 with a short response time of 12 s to 10 ppm ethylene at 350 degrees C. Additionally, the sensor exhibited a low minimum detectable ethylene concentration of 0.3 ppm, high ethylene selectivity and good stability. Therefore, the sensor based on coprecipitated CeOx-SnO2 NPs could ce a promising candidate for detection of ethylene in fruit-ripeness monitoring applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据