Aerosol-Assisted CVD-Grown PdO Nanoparticle-Decorated Tungsten Oxide Nanoneedles Extremely Sensitive and Selective to Hydrogen
Status PubMed-not-MEDLINE Jazyk angličtina Země Spojené státy americké Médium print-electronic
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
27043301
DOI
10.1021/acsami.6b00773
Knihovny.cz E-zdroje
- Klíčová slova
- aerosol-assisted CVD, gas sensor, nanoneedles, nanoparticles,
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
We report for the first time the successful synthesis of palladium (Pd) nanoparticle (NP)-decorated tungsten trioxide (WO3) nanoneedles (NNs) via a two-step aerosol-assisted chemical vapor deposition approach. Morphological, structural, and elemental composition analysis revealed that a Pd(acac)2 precursor was very suitable to decorate WO3 NNs with uniform and well-dispersed PdO NPs. Gas-sensing results revealed that decoration with PdO NPs led to an ultrasensitive and selective hydrogen (H2) gas sensor (sensor response peaks at 1670 at 500 ppm of H2) with low operating temperature (150 °C). The response of decorated NNs is 755 times higher than that of bare WO3 NNs. Additionally, at a temperature near that of the ambient temperature (50 °C), the response of this sensor toward the same concentration of H2 was 23, which is higher than that of some promising sensors reported in the literature. Finally, humidity measurements showed that PdO/WO3 sensors displayed low-cross-sensitivity toward water vapor, compared to bare WO3 sensors. The addition of PdO NPs helps to minimize the effect of ambient humidity on the sensor response.
Department of Chemistry University College London 20 Gordon Street London WC1H 0AJ United Kingdom
Department of Solid State Physics Jožef Stefan Institute Jamova cesta 39 1000 Ljubljana Slovenia
GC University Katchery Road Lahore 54000 Pakistan
Materia Nova Univeristé de Mons Parc Initialis Avenue N Copernic 1 B 7000 Mons Belgium
MINOS EMaS Universitat Rovira i Virgili Avenida Països Catalans 26 43007 Tarragona Spain
SIX Research Centre Brno University of Technology Technická 10 Brno CZ 61600 Czech Republic
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