Behavior of sheet-like crystalline ammonium trivanadate hemihydrate (NH{sub 4}V{sub 3}O{sub 8}×0.5H{sub 2}O) as a novel ammonia sensing material
This work reports the use of ammonium trivanadate hemihydrate (NH{sub 4}V{sub 3}O{sub 8}×0.5H{sub 2}O) as a novel sensing material for ammonia resistive sensors. It was prepared by a simple and fast hydrothermal method from V{sub 2}O{sub 5} as a precursor and characterized by SEM, FT-IR, XRD and TG techniques. The as-synthesized material showed a sheet-like morphology and was found thermally stable up to 250–280 °C. It reacted promptly and irreversibly when exposed to ammonia at room temperature. A full reversibility was instead registered undergoing the formed ammonia adduct at a temperature higher than 200 °C. A NH{sub 4}V{sub 3}O{sub 8}×0.5H{sub 2}O-based resistive gas sensor was fabricated and its sensing properties were evaluated. Experimental results obtained have given a preliminary demonstration of the feasibility of using NH{sub 4}V{sub 3}O{sub 8}×0.5H{sub 2}O as a novel ammonia sensing material since it yields several advantages including easy synthesis of the sensing layer, good sensitivity and reproducibility and fast response. - Graphical abstract: Sheet-like morphology of the synthesized trivanadate hemihydrate (NH{sub 4}V{sub 3}O{sub 8}×0.5H{sub 2}O). Inset: Its electrical response to different ammonia concentrations in air. - Highlights: • A simple hydrothermal method for the fast synthesis of trivanadate hemihydrate (NH{sub 4}V{sub 3}O{sub 8}×0.5H{sub 2}O) is reported. • Sheet particles could be obtained. • A preliminary demonstration of the feasibility of using NH{sub 4}V{sub 3}O{sub 8}×0.5H{sub 2}O as a novel ammonia sensing material is presented.
- OSTI ID:
- 22306321
- Journal Information:
- Journal of Solid State Chemistry, Vol. 202; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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