期刊
APPLIED SURFACE SCIENCE
卷 478, 期 -, 页码 347-354出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2019.01.197
关键词
ZnCoO; Spray pyrolysis; Chemiresistor; Ozone, gas sensor, selectivity
类别
资金
- FAPESP [2013/07296-2, 2016/10973-4, 2017/12437-5]
- CNPq
- CAPES
- Brazilian Nanotechnology National Laboratory (LNNano) in Campinas, SP, Brazil [LMF-18580, XPS-22923, AFM-23724]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [16/10973-4] Funding Source: FAPESP
Chemiresistors are highly important for monitoring and detection of harmful gases produced from industrial processes and vehicle emissions. We report herein an experimental investigation of the gas-sensing properties of Zn0.95Co0.05O thin film deposited by spray pyrolysis technique. The X-ray photoelectron spectroscopy indicated the presence of Co2+ ions into de ZnO lattice. The gas-sensing measurements revealed the sensitivity of Zn0.95Co0.05O film towards ozone gas in a wide range of concentrations from 20 to 1040 ppb, exhibiting good repeatability and total reversibility after consecutive exposures. Selectivity for ozone is observed in comparison to NO2, NH3, and CO gases even at low levels. This manuscript reports the effectiveness of spray-pyrolysis method for obtaining nanostructured Zn1-xCoxO thin films for practical applications as an ozone gas sensor.
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