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Humidity sensing properties of bismuth phosphates


Sheng, Min; Gu, Leilei; Kontic, Roman; Zhou, Ying; Zheng, Kaibo; Chen, Guorong; Mo, Xiaoliang; Patzke, Greta R (2012). Humidity sensing properties of bismuth phosphates. Sensors and Actuators B: Chemical, 166-167:642-649.

Abstract

Cubic sillenite-type and monoclinic bismuth phosphates were synthesized via hydrothermal methods. Structure and morphology of cubic Bi13.1POδ and monoclinic BiPO4 were characterized with a variety of analytical methods including powder X-ray diffraction, electron microscopy methods and surface area measurements. The humidity sensing properties of both bismuth phosphate types were investigated with respect to their capacitance characteristics. Sillenite-type cubic bismuth phosphate exhibits better response behavior than monoclinic BiPO4. Cubic bismuth phosphate displays a capacitance change of up to 4 orders of magnitude over a relative humidity (RH) range from 11% to 95% together with a linear adsorption/desorption relationship. This promising humidity sensing behavior is related to the presence of a framework structure containing polarizable Bi3+ cations in combination with moderate phosphate doping.

Abstract

Cubic sillenite-type and monoclinic bismuth phosphates were synthesized via hydrothermal methods. Structure and morphology of cubic Bi13.1POδ and monoclinic BiPO4 were characterized with a variety of analytical methods including powder X-ray diffraction, electron microscopy methods and surface area measurements. The humidity sensing properties of both bismuth phosphate types were investigated with respect to their capacitance characteristics. Sillenite-type cubic bismuth phosphate exhibits better response behavior than monoclinic BiPO4. Cubic bismuth phosphate displays a capacitance change of up to 4 orders of magnitude over a relative humidity (RH) range from 11% to 95% together with a linear adsorption/desorption relationship. This promising humidity sensing behavior is related to the presence of a framework structure containing polarizable Bi3+ cations in combination with moderate phosphate doping.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Scopus Subject Areas:Physical Sciences > Electronic, Optical and Magnetic Materials
Physical Sciences > Instrumentation
Physical Sciences > Condensed Matter Physics
Physical Sciences > Surfaces, Coatings and Films
Physical Sciences > Metals and Alloys
Physical Sciences > Electrical and Electronic Engineering
Physical Sciences > Materials Chemistry
Language:English
Date:2012
Deposited On:05 Mar 2013 12:10
Last Modified:30 Jul 2020 08:12
Publisher:Elsevier
ISSN:0925-4005
OA Status:Closed
Publisher DOI:https://doi.org/10.1016/j.snb.2012.03.030

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