Gas-sensitive properties of thin and thick film sensors based on Fe2O3-SnO2 nanocomposites

被引：75

作者：

Kotsikau, D

Ivanovskaya, M

Orlik, D

Falasconi, M

机构：

[1] Belarusian State Univ, Phys Chem Problems Res Inst, Minsk 220050, BELARUS

[2] Univ Brescia, INFM, Gas Sensor Lab, I-25133 Brescia, Italy

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2004年 / 101卷 / 1-2期

关键词：

Fe2O3-SnO2; nanocomposites; structural characteristics; gas sensitivity;

D O I：

10.1016/j.snb.2004.02.051

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Influence of phase composition, structural peculiarities and grain size of Fe2O3-SnO, nanocomposites prepared by sol-gel technology on gas-sensitive properties of the corresponding gas sensors has been studied in the paper. The characteristics of thin film sensors were obtained with regards to NO2 and C2H5OH. Behaviour of thick film sensors was estimated in humid C2H5OH ambient. High sensitivity of Fe2O3-SnO2 samples containing highly dispersive Fe2O3 phase has been revealed. The composites consisting of poorly crystallised alpha-Fe2O3 along with Sn(IV)-alpha-Fe2O3 solid solution demonstrate maximum sensitivity to ethanol. Structural and functional distinctions of the Fe2O3-SnO2 composites obtained by using different Fe-precursors (Fe3+ and Fe2+ inorganic salts) have been revealed. Mechanisms of the processes. which determine gas-sensitive behaviour of the composites, are considered. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：199 / 206

页数：8

共 22 条

[1] Synthesis and characterisation of tin-doped iron oxides [J].