ANALYSIS OF HYDROGEN-FLUORIDE WITH SNO2 GAS SENSORS

被引：5

作者：

GODOVSKI, DY ^{[1
]}

VASILIEV, AA ^{[1
]}

DOROFEEV, EV ^{[1
]}

机构：

[1] SENSOR SYST LTD,123060 MOSCOW,RUSSIA

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1994年 / 19卷 / 1-3期

关键词：

D O I：

10.1016/0925-4005(93)01049-A

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The study of the sensitivity of semiconductor tin dioxide sensors towards hydrogen fluoride in air and noble gases has been carried out. The signal of sensor was found to be of the donor type and essential (relative conductivity change was DELTAsigma/sigma(o) = 0.1 for C(HF) = 8 ppm in air). Addition of catalytic compounds, such as Al2O3 and Fe2O3, enhanced sensor's sensitivity as much as ten times. The effect seems to be caused by acid-base interaction of hydrogen fluoride with base Bronsted centres on the surface of SnO2. The addition of base centres (Al2O3, Fe2O3) enhances the sensor's signal drastically.

引用

页码：483 / 485

页数：3

共 5 条

[1]

MORRISON SR, 1977, CHEM PHYSICS SURFACE

[2]

PISLIAKOV AV, 1993, EUROSENSORS, V7, P346

[3] ACID-BASE CONCEPT AND CATALYTIC ACTIVITY OF OXIDES [J].