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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 873A Formaldehyde Gas Sensor Based on Zinc Doped...

A Formaldehyde Gas Sensor Based on Zinc Doped Lanthanum Ferrite

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Abstract:

The gas-sensing properties of zinc doped lanthanum ferrite (Zn-LaFeO₃) compounds for formaldehyde were investigated in this paper. Zn-LaFeO₃ powders were prepared using sol-gel method combined with microwave chemical synthesis. The powders were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM), respectively. The formaldehyde gas-sensing characteristics for the sample were examined. The experimental results indicate that the sensor based on the sample Zn-LaFeO₃ shows excellent gas-sensing properties to formaldehyde gas. At the optimal operating temperature of 250°C, the sensitivity of the sensor based on LaFe_0.7Zn_0.3O₃ to 100ppm formaldehyde is 38, while to other test gases, the sensitivity is all lower than 20. The response and recovery times for the sample to formaldehyde gas are 100s and 100s, respectively.

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The Eighth China National Conference on Functional Materials and Applications

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Periodical:

Advanced Materials Research (Volume 873)

Pages:

304-310

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.873.304

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Online since:

December 2013

Authors:

Jin Zhang*, Yu Min Zhang, Chang Yi Hu, Zhong Qi Zhu, Qing Ju Liu

Keywords:

Formaldehyde, Gas Sensor, High Sensitivity, Zn-LaFeO₃

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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