Gas sensing selectivity of hexagonal and monoclinic WO3 to H2S

Szilágyi, Imre Miklós; Saukko, Sami; Mizsei, J.; Tóth, A.L.; Madarász, János; Pokol, György

doi:10.1016/j.solidstatesciences.2010.01.019

Cited by 105 publications

(59 citation statements)

References 16 publications

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“…One of their major applications is that tungsten oxides, metal tungstates, tungsten carbides or tungsten metal can be prepared from them, all of which are significant for various industries. Tungsten oxides can be used as catalysts [2][3][4][5], photocatalysts [6][7][8][9][10], gas sensors [11][12][13][14][15][16][17][18], chromogenic materials [19][20][21]; metal tungstates can be used among others as catalysts [22], pigments [23,24]; tungsten carbides are the hard components in cutting, drilling, tools [25][26][27] and they are also used as catalysts [28,29]; while tungsten metal is a key element in lighting industry [1,[30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Structure and thermal decomposition of ammonium metatungstate

Hunyadi

Sajó

Szilágyi

2013

J Therm Anal Calorim

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The structure, morphology of ammonium metatungstate (AMT), (NH 4 formed between 380-500 °C, (iv) which then transformed into the more stable m-WO 3 between 500-600 °C. As a difference in air, the as-formed NH 3 ignited with an exothermic heat effect, and nitrous oxides formed as combustion products. The thermal behavior of AMT was similar to ammonium paratungstate (APT), (NH 4 ) 10 [H 2 W 12 O 42 ]•4H 2 O, the only main difference being the lack of dry NH 3 evolution between 170-240 °C in the case of AMT.)

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Section: Introductionmentioning

confidence: 99%

Structure and thermal decomposition of ammonium metatungstate

Hunyadi

Sajó

Szilágyi

2013

J Therm Anal Calorim

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“…WO 3 grown as thin film can be used for various applications, such as electrochromic devices (in displays, smart windows and optical switching coatings) [1][2][3], sensing numerous toxic and inflammable gases [4][5][6][7], photocatalysis [8][9], solar energy conversion [2], water splitting [10], and many others.…”

Section: Introductionmentioning

confidence: 99%

Characterization of PLD grown WO 3 thin films for gas sensing

Boyadjiev

Георгиева

Stefan

et al. 2017

Applied Surface Science

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Tungsten trioxide (WO 3 ) thin films were grown by pulsed laser deposition (PLD) with the aim to be applied in gas sensors. The films were studied by atomic force microscopy (AFM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and profilometry. To study the gas sensing behavior of these WO 3 films, they were deposited on quartz resonators and the quartz crystal microbalance (QCM) method was applied to analyze their gas sensitivity. Synthesis of tetragonal-WO 3 films starting from a target with predominantly monoclinic WO 3 phase was observed. The films deposited at 300 °C presented a surface topology favorable for the sorption properties, consisting of a film matrix with protruding craters/cavities. QCM prototype sensors with such films were tested for NO 2 sensing. The PLD grown WO 3 thin films show good sensitivity and fast reaction at -3/20 -room temperature, even in as-deposited state. With the presented technology, the manufacturing of QCM gas sensors is simple, fast and cost-effective, and it is also suitable for energy-effective portable equipment for on-line monitoring of environmental changes.

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“…It has wide potential of technological applications in various electrochromic devices as displays, smart windows and optical switching coatings [1][2][3]. Also, WO 3 is one of the most promising photocatalysts [4][5][6], and it can be also used in gas sensing [7][8][9][10], solar energy conversion [3], water splitting [11], memory devices [12], etc.…”

Section: Introductionmentioning

confidence: 99%