Gas sensor based on samarium oxide loaded mulberry-shaped tin oxide for highly selective and sub ppm-level acetone detection.

Author(s) Zhang, Y.; Zhou, L.; Liu, Y.; Liu, D.; Liu, F.; Liu, F.; Yan, X.; Liang, X.; Gao, Y.; Lu, G.
Journal J Colloid Interface Sci
Date Published 2018 Dec 01

Mulberry-shaped tin oxide (SnO) hierarchical architectures and samarium oxide (SmO) loaded tin oxide with different amounts (0.5, 1, 2.5, and 4 mol% SmO) were successfully synthesized by facile hydrothermal synthesis method and simple isometric impregnation method. The gas sensing performance of the sensors based on pure SnO and SmO loaded SnO materials were systematically investigated. The results indicated that SmO loading considerably affected the improvement of the sensing performance of the SnO sensor. The 2.5 mol% SmO/SnO exhibited the highest response (41.14) to 100 ppm acetone, the response was 2.29 times higher than that of pure SnO (18). In addition, with 2.5 mol% SmO loading, the low detection threshold of the sensor dropped from 500 ppb to 100 ppb. The enhanced gas sensing performance was mainly bacause of the increased oxygen vacancies created by the substitution of samarium in the SnO lattice, which enhanced the adsorption of oxygen and the exceptional catalytic effect of SmO.

DOI 10.1016/j.jcis.2018.07.052
ISSN 1095-7103
Citation J Colloid Interface Sci. 2018;531:7482.

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