Ni0.9Zn0.1O/ZnO nanocomposite prepared by malonate coprecipitation route for gas sensing

Lontio Fomekong, Roussin;Lahem, D.;Debliquy, M.;Yunus, Sami;Delcorte, Arnaud;et.al.
(2016) Sensors and Actuators B: Chemical : international journal devoted to research and development of physical and chemical transducers — Vol. 231, p. 520-528 (2016)

Files

430-lontioFomekong-Delcorte-2016sensors-and-actuators.pdf
  • Open Access
  • Adobe PDF
  • 2.83 MB
Download

Details

Authors
Show more
Abstract
A nanocomposite material, Ni0.9Zn0.1O/ZnO, was synthesized by controlled thermal treatment of the corresponding nickel zinc malonate previously prepared by coprecipitation in aqueous solution. The co-existence, structure and morphology of the Zn-doped nickel oxide, Ni0.9Zn0.1O and zinc oxide, ZnO, nanoparticles was confirmed by a set of instrumental techniques such as XRD, SEM and ToF-SIMS. The gas-sensing properties of the as-synthesized nanocomposites have been evaluated for CO, NO2, H2 and the results show that the gas sensors based on the Ni0.9Zn0.1O/ZnO nanocomposites exhibit a good selectivity to NO2 at low temperature (225 °C) and, comparing to ZnO and Ni0.9Zn0.1O individually, an increase in the response to CO gas at a high temperature (300 °C). The significant enhancement of the sensing performance of the Ni0.9Zn0.1O/ZnO nanocomposite is attributed to the formation of p-n junctions (metal oxide heterojunctions) between Ni0.9Zn0.1O (p-type semiconductor) and ZnO (n-type semiconductor) and to the catalytic activity of these metal oxides.
Affiliations

Citations

  • APA
  • Chicago
  • FWB

Lontio Fomekong, R., Lahem, D., Debliquy, M., Yunus, S., Lambi Ngolui, J., & Delcorte, A. (2016). Ni0.9Zn0.1O/ZnO nanocomposite prepared by malonate coprecipitation route for gas sensing. Sensors and Actuators B: Chemical : international journal devoted to research and development of physical and chemical transducers, 231, 520-528. https://doi.org/10.1016/j.snb.2016.03.099 (Original work published 2016)