Humidity sensing properties of bismuth phosphates

被引：38

作者：

Sheng, Min ^{[1
]}

Gu, Leilei ^{[2
]}

Kontic, Roman ^{[1
]}

Zhou, Ying ^{[3
]}

Zheng, Kaibo ^{[2
,4
]}

Chen, Guorong ^{[2
]}

Mo, Xiaoliang ^{[2
]}

Patzke, Greta R. ^{[1
]}

机构：

[1] Univ Zurich, Inst Inorgan Chem, CH-8057 Zurich, Switzerland

[2] Fudan Univ, Dept Mat Sci, Shanghai 200443, Peoples R China

[3] SW Petr Univ, State Key Lab Oil & Gas Reservoir & Exploitat, Chengdu 610500, Peoples R China

[4] Lund Univ, Dept Chem Phys, SE-22100 Lund, Sweden

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2012年 / 166卷

基金：

瑞士国家科学基金会;

关键词：

Humidity sensors; Bismuth phosphate; Sillenite type; Hydrothermal synthesis; SENSOR; NANORODS; FILM;

D O I：

10.1016/j.snb.2012.03.030

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Cubic sillenite-type and monoclinic bismuth phosphates were synthesized via hydrothermal methods. Structure and morphology of cubic Bi13.1PO delta 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. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：642 / 649

页数：8

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