Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 112, Issue -, Pages 43-49Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2017.08.039
Keywords
Cd doped ZnO; Nanoparticles; Surfactant-mediated method; Gas sensing performances; Sensing mechanism
Funding
- Department of Science and Technology of Yunnan Province via the Key Project for the Science and Technology [2017FA025]
- National Natural Science Foundation of China [61761047]
- Program for Excellent Young Talents, Yunnan University [XT412003]
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Zinc oxide nanoparticles with the different Cd doping contents were prepared by with a surfactant-mediated method in this paper. The effects of Cd doping on the gas sensing properties of the ZnO nanoparticles were studied. The morphology and microstructure of as-prepared samples were characterized by X-ray diffraction (XRD); scanning electron microscopy (SEM), transmission electron microscopy (TEM), and high-resolution TEM (HRTEM), respectively. The results reveal that all the products are the high crystalline hexagonal wurtzite ZnO crystal structure. The gas-sensing characteristics of the Cd doped ZnO nanoparticles for volatile organiccompounds (VOCs) were investigated. At its optimal operation temperature of 300 degrees C, the sensing properties of the Cd doped ZnO nanoparticles for n-butanol gas exhibit a high-performance gas sensing performances including high gas response, good selectivity, response/recovery time, and repeatability as well as stability. Especially, its response reaches 130 for 100 ppm n-butanol of ZnO nanoparticles with 2.5% Cd doping. Those values demonstrate the potential of using as-prepared Cd doped ZnO nanoparticles for n-butanol gas detection, making them to be promising candidates for practical detectors to n-butanol gas. Apart from these, the mechanism related to the advanced properties was also investigated and presented.
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