4.6 Article

UV-enhanced NO2 sensor using ZnO quantum dots sensitized SnO2 porous nanowires

期刊

NANOTECHNOLOGY
卷 33, 期 18, 页码 -

出版社

IOP Publishing Ltd
DOI: 10.1088/1361-6528/ac49c1

关键词

SnO2 porous nanowires; ZnO quantum dots sensitized; UV irradiation; NO2 gas sensor

资金

  1. Heilongjiang Province Science Foundation [YQ2019F013]
  2. Natural Science Foundation of China [52102164]

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ZnO quantum dots sensitized SnO2 porous nanowires were fabricated and designed for UV excitation gas sensor. The ZnO/SnO2 composite (SZQ1%) showed excellent sensing properties to NO2 gas under UV irradiation, with a detection limit of 100 ppb. The humidity stability of SZQ1% was also measured and discussed.
ZnO quantum dots sensitized SnO2 porous nanowires were fabricated and designed for UV excitation gas sensor. The ZnO/SnO2 composite (SZQ1%) with the molar proportion of 1:100 exhibits excellent sensing properties to NO2 gas under UV irradiation at 40 degrees C. The limits of detection of the SZQ1% sensor is 100 ppb. The humidity stability of SZQ1% was also measured and discussed by DC reversed circuit and complex impedance curves. The gas sensing mechanism is well discussed and illustrated to the ZnO quantum dots sensitized and the increased photo-generated carriers under UV irradiation.

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