Citation: HU Rui-Jin, WANG Jing, ZHU Hui-Chao. Preparation and Gas Sensing Properties of PdO, Au, CdO Coatings on SnO₂ Nanofibers[J]. Acta Physico-Chimica Sinica, ;2015, 31(10): 1997-2004. doi: 10.3866/PKU.WHXB201508241 shu

Preparation and Gas Sensing Properties of PdO, Au, CdO Coatings on SnO₂ Nanofibers

1.
School of Electronic Science and Technology, Dalian University of Technology, Dalian 116023, Liaoning Province, P. R. China

Received Date: 25 May 2015
Available Online: 24 August 2015
Fund Project: 国家自然科学基金(61176068, 61131004, 61107028)资助项目 (61176068, 61131004, 61107028)

SnO₂ nanofibers fabricated by electrospinning were coated with PdO, Au, and CdO. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDX), X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET) tests were used to characterize the nanofibers. The diameters of bare and coated SnO₂ nanofibers were approximately 200 nm, and had 15-nm diameter grains. The gas-sensing properties of all the nanofibers were characterized under static gas conditions. The results indicated that the bare SnO₂ nanofibers were sensitive to formaldehyde; however the sensitivity of the coated nanofibers was better. In particular, the CdO-coated SnO₂ exhibited the highest sensitivity to formaldehyde, the shortest response and recovery times, and od selectivity. The operating temperature of the Au-coated SnO₂ decreased from 300 to 200 ℃, while the PdO-coated SnO₂ exhibited the highest sensitivity to toluene. The sensing mechanism of the coated SnO₂ nanofibers was investigated.
- Gas sensor,
- SnO₂,
- Coating,
- Electrospinning,
- Gas sensing mechanism
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Preparation and Gas Sensing Properties of PdO, Au, CdO Coatings on SnO2 Nanofibers

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通讯作者: 陈斌, bchen63@163.com

Preparation and Gas Sensing Properties of PdO, Au, CdO Coatings on SnO₂ Nanofibers