pp. 277-282
S&M649 Research Paper Published: 2006 Preparation of Ultrafine ZnFe2O4 and Its Gas-Sensing Properties for Cl2 [PDF] Jianzhou Zhang, Donghui Chen and Liang Chen Keywords: Cl2 sensor, ZnFe2O4, microemulsion, semiconductor, spinel-type oxide
Ultrafine ZnFe2O4, a Cl2 gas-sensing material has been successfully fabricated by a novel polyoxyethylene lauryl ether + n-hexanol/n-heptance/water (zinc nitrate + ferrum nitrate) W/O microemulsion method. The composition and structure of the powder have been detected by X-ray diffraction analysis (XRD) and transmission electron microscopy (TEM). The results show that the as-made ZnFe2O4 has a spinel-type structure, and the size of each spherical particle is 30 nm with good dispersiveness. The effect of temperature on the sensitivity of sensors, gas sensor's selectivity, the effect of gas concentration, and response and recovery characteristics are investigated at the optimum working temperature of 270℃. The measurement of gas-sensing properties of the ZnFe2O4 sensors indicates that these sensors have high sensitivity, excellent selectivity and quick-response behavior to Cl2 gas. The gas-sensing mechanism is also discussed.
Corresponding author: Jianzhou ZhangCite this article Jianzhou Zhang, Donghui Chen and Liang Chen, Preparation of Ultrafine ZnFe2O4 and Its Gas-Sensing Properties for Cl2, Sens. Mater., Vol. 18, No. 5, 2006, p. 277-282. |