A planar catalytic combustion sensor using nano-crystalline F-doped SnO2 as a supporting material for hydrogen detection

Abstract

A planar catalytic combustion gas sensor based on Pd/Pt catalyst supported on F-doped SnO 2 nano-crystalline materials has been designed and fabricated for hydrogen detection. The sensor consists of platinum heaters on an alumina plate coated with a catalytic layer and compensating layer. This sensor exhibited better performance than that of the sensors employing sensing material of Pd/Pt catalyst on -Al 2 O 3 and of Pd/Pt catalyst on nano-crystalline SnO 2 . The detection limit of the sensor at 370 o C is in the concentration range of 0.5-5% (v/v), with an excellent linearity of signal voltage to the hydrogen gas concentration.

Influence of fluorine doping on the microstructure, optical and electrical properties of SnO2 nanoparticles

“…The optical band gap value of tin oxide decreases from 3.88 to 3.44 eV with the increase of fluorine content. Impedance spectroscopy results indicate that the electrical properties are strongly dependent on presented as good material due to its superior physical and chemical properties for a large range of applications like gas sensors [11][12][13], photocatalysts [14] and solar cells [15,16]. Indeed, the properties of FTO powder are affected by the preparation process.…”

Properties of fluorine-doped SnO2 thin films by a green sol–gel method

“…Nowadays, FTO films have been extensively used as a substitute for traditional indium tin oxide (ITO) [19], which been extensively used in gas sensor devices [24][25][26], solar cells [27,28], touch panels [29], light emitting diodes [30], substrates for electro-deposition [31], and other transparent electrical contacts in optoelectronic devices.…”

Nanocrystalline SnO2:F Thin Films for Liquid Petroleum Gas Sensors

“…Fluorine (F) doped SnO 2 coated on glasses are now widely developed as transparent and conduction substrates for use in optical and electronic applications [12]. According to the literature survey, however, there are very few reports available [13–15] on the developing SnO 2 :F thin-film based gas sensors. Several deposition techniques have been used to grow un-doped and doped SnO 2 films, including sputtering [7], E-beam evaporation [4], spray pyrolysis [8,9] and sol-gel [6].…”