In:
Journal of Advanced Ceramics, Tsinghua University Press, Vol. 9, No. 1 ( 2020-02), p. 17-26
Abstract:
Hierarchical WO 3 nanomesh, assembled from single-crystalline WO 3 nanowires, is prepared via a hydrothermal method using thiourea (Tu) as the morphology-controlling agent. Formation of the hierarchical architecture comprising of WO 3 nanowires takes place via Ostwald ripening mechanism with the growth orientation. The sensor based on WO 3 nanomesh has good electrical conductivity and is therefore suitable as NO 2 sensing material. The WO 3 nanomesh sensor exhibited high response, short response and recovery time, and excellent selectivity towards ppb-level NO 2 at low temperature of 160 ℃. The superior gas performance of the sensor was attributed to the high-purity hexagonal WO 3 with high specific surface area, which gives rise to enhanced surface adsorption sites for gas adsorption. The electron depletion theory was used for explaining the NO 2 -sensing mechanism by the gas adsorption/desorption and charge transfer happened on the surface of WO 3 nanomesh.
Type of Medium:
Online Resource
ISSN:
2226-4108
,
2227-8508
DOI:
10.1007/s40145-019-0343-3
Language:
English
Publisher:
Tsinghua University Press
Publication Date:
2020
detail.hit.zdb_id:
2682430-9
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