Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 247, Issue -, Pages 664-672Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.03.099
Keywords
Solvothermal; Mesoporous SnO2 microtubes; Formaldehyde; Remarkable selectivity; Large specific surface area
Funding
- National Natural Science Foundation of China [61271126, 21547012, 21305033]
- International Science & Technology Cooperation Program of China [2016YFE0115100]
- Science and Technology Project of Heilongjiang province [B2015008]
- Heilongjiang Educational Department [2013TD002]
- Youth Foundation of Harbin [2015RQQXJ047]
- Heilongjiang Postdoctoral Scientific Developmental [LBH-Q15118, LBH-16198]
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Distinctive mesoporous SnO2 microtubes were synthesized via a facile and environmentally friendly solvothermal method. The gas sensor based on such SnO2 microtubes exhibited not only the lower detection limit to detect formaldehyde and remarkable selectivity comparison with other various gases when operating within 92 degrees C, but also good linear relationship under concentration ranges of ppm level (1-100 ppm) and ppb level (10-100 ppb). The sensing properties of such SnO2 microtubes have been greatly improved compared to previously reported hollow structures. This might be attributed to their large specific surface area and porous structure, which can promote the diffusion of gas molecules and their adsorption on the surface of the sensing material. (C) 2017 Elsevier B.V. All rights reserved.
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