High Sensing Properties of 3 wt % Pd-Doped SmFe1–xMgxO3 Nanocrystalline Powders to Acetone Vapor with Ultralow Concentrations under Light Illumination
journal contributionposted on 19.04.2018 by Heng Zhang, Hongwei Qin, Panpan Zhang, Jifan Hu
Any type of content formally published in an academic journal, usually following a peer-review process.
Nanocrystalline powders of 3 wt % Pd-doped SmFe1–xMgxO3 (x = 0, 0.1, 0.2, and 0.3) were prepared by a sol–gel method and annealed at 750 °C. Pd:SmFe0.9Mg0.1O3 has a maximum response at 220 °C. When exposed to 0.5 ppm acetone vapor, the response of undoped SmFeO3 is 2.26 and the response of Pd:SmFe0.9Mg0.1O3 is 7.16. Under light illumination, Pd:SmFe0.9Mg0.1O3 has a better sensing performance and lower optimal operating temperature. The sensor shows good selectivity and stability for acetone vapor. The high response and good selectivity of Pd:SmFe0.9Mg0.1O3 to ultralow concentrations of acetone vapor indicate its potential for applications in many areas.