Gas sensor based on three dimensional Bi2S3 nanowires network for ammonia detection at room temperature

Journal Article · Thu Mar 15 00:00:00 EDT 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2017.11.038· OSTI ID:22805468

Fu, Tie-Xiang ^[1]

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1. Department of Chemistry and Biological Engineering, Changsha University of Science & Technology, Wanjiali Road, Changsha, 410004, Hunan (China)

Highlights: • Three dimensional Bi{sub 2}S{sub 3} nanowires networks. • High response to NH{sub 3} gas. • Good selectivity. • Wide linear range. • Work at room temperature. - Abstract: A film containing three dimensional Bi{sub 2}S{sub 3} nanowires network was obtained using Bi(NO{sub 3}){sub 3} and thioacetamide as starting materials through three steps, namely the chemical synthesis of Bi{sub 2}S{sub 3}, preparation of its sol under ultrasonic condition and crystal self-assembly at 25 °C. The nanowires had diameters of 20–100 nm. The formation mechanism of the 3D nanowires network is the anisotropic growth of Bi{sub 2}S{sub 3}. The sensor based on 3D Bi{sub 2}S{sub 3} nanowires network with an excellent response to ammonia at 30 °C. The response mechanism of the sensor for ammonia is a weak coordination adsorption of ammonia molecule on the Bi{sub 2}S{sub 3} nanowires and the electron is partially transferred from ammonia molecule to bismuth (III) ion. The maximum response of the sensor to ammonia was up to 82.3 and had a good linear range from 30 to 350 ppm concentration, indicating its potential applications in the determination and leak alarm of ammonia.

• OSTI ID: 22805468
• Journal Information: Materials Research Bulletin, Vol. 99; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACETAMIDE
ADSORPTION
AMMONIA
BISMUTH IONS
BISMUTH NITRATES
BISMUTH SULFIDES
CONCENTRATION RATIO
CRYSTALS
DETECTION
ELECTRONS
GRAIN GROWTH
NANOWIRES
SENSORS
SOLS
SYNTHESIS
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
THREE-DIMENSIONAL LATTICES
ULTRASONIC WAVES