Detail publikačního výsledku

p-Type PdO nanoparticles supported on n-type WO3 nanoneedles for hydrogen sensing

VALLEJOS VARGAS, S.

Originální název

p-Type PdO nanoparticles supported on n-type WO3 nanoneedles for hydrogen sensing

Anglický název

p-Type PdO nanoparticles supported on n-type WO3 nanoneedles for hydrogen sensing

Druh

Článek WoS

Originální abstrakt

We report the synthesis of palladium nanopartide (NP) decorated WO3 nanoneedles (NNs) employing a singlestep, aerosol assisted chemical vapor deposition approach. Two different Pd precursors were investigated in view of optimizing the morphology and the gas sensing performance of the resulting nanostructured films. In particular, palladium acetylacetonate was found to be more suitable than ammonium hexachloropalladate for obtaining n-type WO3 NNs uniformly decorated with well dispersed p-type PdO NPs. The active films could be directly deposited on the electrode area of microelectromechanical system-based resistive transducers. The morphology and chemical composition of the films was investigated by scanning electron microscopy, high-resolution transmission electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy analysis. PdO-decorated WO3 NNs show a response toward hydrogen that is about 680 times higher than that of bare WO3 NNs. Finally, PdO-loaded sensors display extremely low-cross sensitivity to water vapor, which makes them remarkably immune to changes in the background humidity.

Anglický abstrakt

We report the synthesis of palladium nanopartide (NP) decorated WO3 nanoneedles (NNs) employing a singlestep, aerosol assisted chemical vapor deposition approach. Two different Pd precursors were investigated in view of optimizing the morphology and the gas sensing performance of the resulting nanostructured films. In particular, palladium acetylacetonate was found to be more suitable than ammonium hexachloropalladate for obtaining n-type WO3 NNs uniformly decorated with well dispersed p-type PdO NPs. The active films could be directly deposited on the electrode area of microelectromechanical system-based resistive transducers. The morphology and chemical composition of the films was investigated by scanning electron microscopy, high-resolution transmission electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy analysis. PdO-decorated WO3 NNs show a response toward hydrogen that is about 680 times higher than that of bare WO3 NNs. Finally, PdO-loaded sensors display extremely low-cross sensitivity to water vapor, which makes them remarkably immune to changes in the background humidity.

Klíčová slova

Aerosol-assisted chemical vapor desposition; Hydrogen sensor; Palladium oxide; Tungsten oxide; Nanoneedles

Klíčová slova v angličtině

Aerosol-assisted chemical vapor desposition; Hydrogen sensor; Palladium oxide; Tungsten oxide; Nanoneedles

Autoři

VALLEJOS VARGAS, S.

Rok RIV

2021

Vydáno

26.08.2016

ISSN

0040-6090

Periodikum

Thin Solid Films

Svazek

618

Číslo

special issue

Stát

Nizozemsko

Strany od

238

Strany do

245

Strany počet

8

URL

https://doi.org/10.1016/j.tsf.2016.08.053

BibTex

@article{BUT170139,
  author="Stella {Vallejos Vargas}",
  title="p-Type PdO nanoparticles supported on n-type WO3 nanoneedles for hydrogen sensing",
  journal="Thin Solid Films",
  year="2016",
  volume="618",
  number="special issue",
  pages="238--245",
  doi="10.1016/j.tsf.2016.08.053",
  issn="0040-6090",
  url="https://doi.org/10.1016/j.tsf.2016.08.053"
}