< Back to previous page

Publication

Sub-ppm $H_{2}S$ sensing by tubular $ZnO-Co_{3}O_{4}$ nanofibers

Journal Contribution - e-publication

Tubular ZnO – Co3O4 nanofibers were co-electrospun from polymer solution containing zinc and cobalt acetates. Phase composition, cobalt electronic state and element distribution in the fibers were investigated by XRD, SEM, HRTEM, HAADF-STEM with EDX mapping, and XPS. Bare ZnO has high selective sensitivity to NO and NO2, while ZnO-Co3O4 composites demonstrate selective sensitivity to H2S in dry and humid air. This effect is discussed in terms of transformation of cobalt oxides into cobalt sulfides and change in the acidity of ZnO oxide surface upon cobalt doping. Reduction in response and recovery time is attributed to the formation of a tubular structure facilitating gas transport through the sensitive layer.
Journal: Sensors and actuators : B : chemical
ISSN: 0925-4005
Volume: 307
Publication year:2020
Keywords:A1 Journal article
BOF-keylabel:yes
BOF-publication weight:6
CSS-citation score:2
Authors:International
Authors from:Higher Education
Accessibility:Closed