Majumder, Deblina and Roy, Somenath
(2018)
Development of Low-ppm CO Sensors Using Pristine CeO2Nanospheres with High Surface Area.
ACS Omega, 3 (4).
pp. 4433-4440.
ISSN 2470-1343
Abstract
Mesoporous CeO2nanospheres with appreciably highsurface area are prepared using reversed micelles by a water-in-oilmicroemulsion method. The structural morphology and semiconduct-ing properties of the nanoparticles are thoroughly investigated using X-ray diffraction,field effect scanning electron microscopy, transmissionelectron microscopy, and UV−visible spectroscopic techniques. Evenafter high-temperature calcination, the morphological retention of thematerial is apparent by electron microscopy. The deployment ofundoped CeO2nanospheres for the detection of low-ppm CO yieldssuperior performances in terms of sensitivity, response−recovery times,and selectivity compared to those of other sensors of the same genre.These CO sensors exhibit∼52% sensitivity with a response time ofonly 13 s. The sensor parameters are analyzed as a function of bothtemperature and gas concentration. In addition to that on the cost-effective and scalable synthesis of CeO2nanospheres, this article also reports on the fabrication of packaged CO sensors, whichcan be potentially utilized for industrial and environmental monitoring purposes.
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