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首页> 外文期刊>Physica, B. Condensed Matter >Synthesis and sensing properties of zirconium-doped hematite nanoparticles
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Synthesis and sensing properties of zirconium-doped hematite nanoparticles

机译：掺锆赤铁矿纳米粒子的合成与传感性能

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摘要

Zirconium-doped hematite particles of the type xZrO(2)-(1-x)alpha-Fe2O3 (x = 0.1, 0.5) were synthesized using mechanochemical activation and characterized by X-ray diffraction (XRD) and Mossbauer spectroscopy. For x = 0.1 all zirconia was dissolved in the hematite lattice after 12 h of ball milling and a particle size of 9 nm was obtained. We obtained the recoilless fraction as function of the ball milling time for each value of the molar concentration x. The appearance of nanoparticles in the system was demonstrated based on these plots. We further correlated the structural properties of the zirconium-doped hematite system with the sensing properties of the best candidate in the series. These were measured as function of temperature, gas concentration (carbon monoxide and methane) and variable humidity of air. The material system was found to be sensitive over the entire range of CO concentrations and the linearity of the sensor signal was not affected by the relative humidity of air, qualities which make it the ideal system for gas sensing.
机译：使用机械化学活化法合成了xZrO（2）-（1-x）α-Fe2O3（x = 0.1，0.5）类型的掺锆赤铁矿颗粒，并通过X射线衍射（XRD）和Mossbauer光谱进行了表征。对于x = 0.1，球磨12小时后，所有氧化锆都溶解在赤铁矿晶格中，并且获得9 nm的粒径。对于摩尔浓度x的每个值，我们获得了无回弹分数与球磨时间的关系。根据这些图可以证明系统中纳米粒子的外观。我们进一步将掺锆赤铁矿体系的结构性质与该系列中最佳候选物的感测性质相关联。根据温度，气体浓度（一氧化碳和甲烷）和可变的空气湿度来测量这些值。发现该材料系统在整个CO浓度范围内都很灵敏，并且传感器信号的线性不受空气相对湿度的影响，其质量使其成为气体传感的理想系统。

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