纳米γ-Fe2O3/SiO2复合氧化物的制备及气敏性质

CIESC Journal

• PROCESS AND PRODUCT TECHNOLOGY • 上一篇下一篇

纳米γ-Fe₂O₃/SiO₂复合氧化物的制备及气敏性质

马丽景^a; 闫涛^a; 白守礼; 黄小葳^a; 宋永吉^b; 陈霭璠^a; LIUChungChium^c

^a College of Science, Beijing University of Chemical Technoiogy, Beijing 100029, China
^b College of Material and Chemical Engineering, Beijing Institute of Petrochemical
Technology, Beijing 102617, China
^c Department of Chemical Engineering, Case Western Reserve University, Cleveland, OH44106,
USA

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2004-04-28 发布日期:2004-04-28
通讯作者: 马丽景

The Preparation and Gas-sensing Property of Nanosize γ-Fe₂O₃／SiO₂

MA Lijing^a; YAN Tao^a; BAI Shouli; HUANG Xiaowei^a; SONG Yongji^b; CHEN Aifan^a; LIUChungChium^c

^a College of Science, Beijing University of Chemical Technoiogy, Beijing 100029, China
^b College of Material and Chemical Engineering, Beijing Institute of Petrochemical
Technology, Beijing 102617, China
^c Department of Chemical Engineering, Case Western Reserve University, Cleveland, OH44106,
USA

Received:1900-01-01 Revised:1900-01-01 Online:2004-04-28 Published:2004-04-28
Contact: MA Lijing

摘要/Abstract

摘要： Nanostructured γ-Fe2O3/SiO2 complex oxide was prepared by sol-gel method with
tetraethoxysilane and iron nitrate as precursors. The particle size distribution, thermal
and phase stabilities and gas sensing properties were systematically characterized by TEM,
granularity distribution, TG-DTA, XRD and gas sensitivity measurements. The particle size
is about 10 nm and size distribution is very narrow. The sensitivity of the sensing element
to CO, H2, C2H4, C6H6 and the effects of calcination temperature on the sensitivity and
conductance of gases were examined. The combination of excellent thermal stability and
tunable gas sensing properties through careful control of the preparation and judicious
selection of material compositions gives rise to novel nanocomposites, which is attractive
for the sensitive and selective detection of reducing gases and some hydrocarbon gases.

关键词: 气敏性质;γ-Fe₂O₃;SiO₂;化合物;氧化物;硝酸钾;接触反应;氧化反应

Abstract: Nanostructured γ-Fe2O3/SiO2 complex oxide was prepared by sol-gel method with
tetraethoxysilane and iron nitrate as precursors. The particle size distribution, thermal
and phase stabilities and gas sensing properties were systematically characterized by TEM,
granularity distribution, TG-DTA, XRD and gas sensitivity measurements. The particle size
is about 10 nm and size distribution is very narrow. The sensitivity of the sensing element
to CO, H2, C2H4, C6H6 and the effects of calcination temperature on the sensitivity and
conductance of gases were examined. The combination of excellent thermal stability and
tunable gas sensing properties through careful control of the preparation and judicious
selection of material compositions gives rise to novel nanocomposites, which is attractive
for the sensitive and selective detection of reducing gases and some hydrocarbon gases.

Key words: nanostructural composites, Fe₂O₃, SiO₂, gas-sensing properties

马丽景, 闫涛, 白守礼, 黄小葳, 宋永吉, 陈霭璠, LIUChungChium. 纳米γ-Fe₂O₃/SiO₂复合氧化物的制备及气敏性质[J]. CIESC Journal.

MA Lijing, YAN Tao, BAI Shouli, HUANG Xiaowei, SONG Yongji, CHEN Aifan, LIUChungChium. The Preparation and Gas-sensing Property of Nanosize γ-Fe₂O₃／SiO₂[J]. .

纳米γ-Fe₂O₃/SiO₂复合氧化物的制备及气敏性质

The Preparation and Gas-sensing Property of Nanosize γ-Fe₂O₃／SiO₂

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