期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 280, 期 -, 页码 46-53出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.10.058
关键词
Mesoporous; Cobalt oxyhydroxide; Humidity sensing; Sensing mechanism
资金
- Fundamental Research Funds for the Central Universities [3102017jc01001]
- Seed Foundation of Innovation and Creation for Graduate Students in NPU [ZZ2018030]
- National Natural Science Foundation of China [51503116]
A humidity-responsive material of mesoporous CoO(OH) was synthesized successfully via one-pot hydrothermal method and the influence of CoO(OH) precursor concentration on humidity sensitive performance was studied. The structure and morphology of mesoprous CoO(OH) was characterized by X-ray Diffraction, Infrared spectra, Nitrogen adsorption and desorption, Scanning electron microscope, Transmission electron microscope and so on. The optimized mesoporous CoO(OH) based sensor showed the best linearity and high humidity sensitivity over a wide range of the humidity range (11-95% RH). Its impedance changed nearly four orders of magnitude and the response time was about 1.6 s. Humidity sensing mechanism was discussed in detail.
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