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Highly sensitive response of solution-processed bismuth sulfide nanobelts for room-temperature nitrogen dioxide detection.
- Source :
-
Journal of Colloid & Interface Science . Nov2017, Vol. 506, p102-110. 9p. - Publication Year :
- 2017
-
Abstract
- Low dimensional nanomaterials have emerged as candidates for gas sensors owing to their unique size-dependent properties. In this paper, Bi 2 S 3 nanobelts were synthesized via a facile solvothermal process and spin-coated onto alumina substrates at room temperature. The conductometric devices can even sensitively response to the relatively low concentrations of NO 2 at room temperature, and their sensing performance can be effectively enhanced by the ligand exchange treatment with inorganic salts. The Pb(NO 3 ) 2 -treated device exhibited superior sensing performance of 58.8 under 5 ppm NO 2 at room-temperature, with the response and recovery time of 28 and 106 s. The competitive adsorption of NO 2 against O 2 on Bi 2 S 3 nanobelts, with the enhancement both in gas adsorption and charge transfer caused by the porous network of the very thin Bi 2 S 3 nanobelts, can be a reasonable explanation for the improved performance at room temperature. Their sensitive room-temperature response behaviors combined with the excellent solution processability, made Bi 2 S 3 nanobelts very attractive for the construction of low-cost gas sensors with lower power consumption. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NITROGEN dioxide
*BISMUTH
*NANOBELTS
*LIGAND exchange reactions
*CHARGE transfer
Subjects
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 506
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 124795399
- Full Text :
- https://doi.org/10.1016/j.jcis.2017.07.012