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Surface Structure Engineering of Nanosheet-Assembled NiFe

机译:纳米片组装NiFe的表面结构工程

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摘要

In this work, we present a strategy to improve the gas-sensing performance of NiFe2O4 via a controllable annealing Ni/Fe precursor to fluffy NiFe2O4 nanosheet flowers. X-ray diffraction (XRD), a scanning electron microscope (SEM), nitrogen adsorption–desorption measurements and X-ray photoelectron spectroscopy (XPS) were used to characterize the crystal structure, morphology, specific surface area and surface structure. The gas-sensing performance was tested and the results demonstrate that the response was strongly influenced by the specific surface area and surface structure. The resultant NiFe2O4 nanosheet flowers with a heating rate of 8 °C min−1, which have a fluffier morphology and more oxygen vacancies in the surface, exhibited enhanced response and shortened response time toward ethanol. The easy approach facilitates the mass production of gas sensors based on bimetallic ferrites with high sensing performance via controlling the morphology and surface structure.
机译:在这项工作中,我们展示了一种通过可控退火的Ni / Fe前体来提高NiFe2O4的气体感测性能的策略,以蓬松的NiFe2O4纳米晶片花。 X射线衍射(XRD),扫描电子显微镜(SEM),氮吸附 - 解吸测量和X射线光电子能谱(XPS)用于表征晶体结构,形态,比表面积和表面结构。测试气体传感性能,结果表明,响应受特定表面积和表面结构的强烈影响。所得的NiFe2O4纳米柱的加热速率为8°C min-1,在表面上具有蓬松的形态和更多氧空位,表现出增强的响应和缩短往乙醇的响应时间。简单的方法促进了基于双金属铁氧体的气体传感器的批量生产,通过控制形态和表面结构,具有高感测性能。

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