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Gas-sensing properties of hollow and hierarchical copper oxide microspheres

Authors
Journal
Sensors and Actuators B Chemical
0925-4005
Publisher
Elsevier
Publication Date
Volume
128
Issue
1
Identifiers
DOI: 10.1016/j.snb.2007.06.013
Keywords
  • Hollow
  • Hierarchical
  • Copper Oxide
  • Microspheres
  • Gas-Sensing Properties

Abstract

Abstract Novel microgas sensors based on hollow and hierarchical copper oxide microspheres are fabricated and their gas-sensing properties are researched. The copper oxide microspheres are characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) after being annealed at 300 °C, 500 °C and 700 °C. The experimental results show that the microspheres have large response, fast response/recovery rate and good stability. The detection limits toward CO and C 2H 5OH of the microspheres annealed at 700 °C are below 1 ppm and 100 ppb, respectively. There is no obvious change in resistance and response within 1 month.

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