Metal-Organic Frameworks for Sensing Applications in the Gas Phase

被引：425

作者：

Achmann, Sabine ^{[1
]}

Hagen, Gunter ^{[1
]}

Kita, Jaroslaw ^{[1
]}

Malkowsky, Itamar M. ^{[2
]}

Kiener, Christoph ^{[2
]}

Moos, Ralf ^{[1
]}

机构：

[1] Univ Bayreuth, D-95440 Bayreuth, Germany

[2] BASF SE, Ludwigshafen, Germany

来源：

SENSORS | 2009年 / 9卷 / 03期

关键词：

Metal-organic framework; MOF; impedance spectroscopy; humidity; gas sensor; HUMIDITY SENSORS;

D O I：

10.3390/s90301574

中图分类号：

O65 [分析化学];

学科分类号：

070302 [分析化学];

摘要：

Several metal-organic framework (MOF) materials were under investigated to test their applicability as sensor materials for impedimetric gas sensors. The materials were tested in a temperature range of 120 degrees C -240 degrees C with varying concentrations of O-2, CO2, C3H8, NO, H-2, ethanol and methanol in the gas atmosphere and under different test gas humidity conditions. Different sensor configurations were studied in a frequency range of 1 Hz -1 MHz and time-continuous measurements were performed at 1 Hz. The materials did not show any impedance response to O-2, CO2, C3H8, NO, or H-2 in the gas atmospheres, although for some materials a significant impedance decrease was induced by a change of the ethanol or methanol concentration in the gas phase. Moreover, pronounced promising and reversible changes in the electric properties of a special MOF material were monitored under varying humidity, with a linear response curve at 120 degrees C. Further investigations were carried out with differently doped MOF materials of this class, to evaluate the influence of special dopants on the sensor effect.

引用

页码：1574 / 1589

页数：16

共 28 条

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Amperometric enzyme-based gas sensor for formaldehyde:: Impact of possible interferences [J].