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Nanocrystalline Ce doped CoFe_2O_4 as an acetone gas sensor

机译：纳米铈掺杂CoFe_2O_4作为丙酮气体传感器

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摘要

Nanocrystalline CoFe_(2-x)Ce_xO_4 ferrites (x=0, 0.04, 0.08) were synthesized by using the inexpensive, simple and eco-friendly molten-salt (M-S) method. Effects of Ce doping on the structural, morphological and gas sensing properties of the CoFe_2O_4 ferrite were investigated. X-ray diffraction (XRD) analysis revealed the formation of spinel CoFe_2O_4. Transmission electron microscopy (TEM) investigations showed that the synthesized ferrite is made up of very fine spherical nanoparticles. Furthermore, the gas response of nanocrystalline ferrite materials was investigated in the temperature range of 200-450 °C toward the reducing gases like liquefied petroleum gas (LPG), acetone, ethanol and ammonia. The sensor response was found to be sensitive and selective toward acetone as compared to other reducing gases. It is observed that the addition of Ce (4 wt%) strongly influenced the response and the operating temperature of the sensor material and thus can serve as acetone-sensing sensors.
机译：利用廉价，简单且环保的熔融盐法（M-S）合成了纳米晶CoFe_（2-x）Ce_xO_4铁氧体（x = 0、0.04、0.08）。研究了铈掺杂对CoFe_2O_4铁氧体结构，形貌和气敏性能的影响。 X射线衍射（XRD）分析表明尖晶石CoFe_2O_4的形成。透射电子显微镜（TEM）研究表明，合成的铁氧体由非常细的球形纳米颗粒组成。此外，在200-450°C的温度范围内研究了纳米晶铁氧体材料对还原气（如液化石油气（LPG），丙酮，乙醇和氨气）的气体响应。与其他还原气体相比，发现传感器响应对丙酮敏感且具有选择性。观察到，添加Ce（4 wt％）强烈影响传感器材料的响应和工作温度，因此可以用作丙酮传感传感器。

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