Preparation and gas sensing characteristics of nanoparticulate p-type semiconducting LnFeO3 and LnCrO3 materials
Preparation and gas sensing characteristics of nanoparticulate p-type semiconducting LnFeO3 and LnCrO3 materials
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DOI：
10.1002/adfm.200600454
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发表时间：
2007-09-03
影响因子：
19
通讯作者：
Simon, Ulrich
中科院分区：
文献类型：
--
作者：
Siemons, Maike;Leifert, Annika;Simon, Ulrich
采用多元醇法合成了纳米钙钛矿型LnBO（3）（Ln = La，Pr，Nd，Sm，Eu，Gd，Tb，Dy，Ho，Er，Tin，Y B，Lu; B = Cr，Fe）氧化物。X射线衍射用于确认材料的结构，扫描电子显微镜用于成像样品的形貌。该粉末用于制备悬浮液，该悬浮液作为厚膜沉积在氧化铝基底上的梳型Pt电极上。通过使用高通量阻抗谱进行电气表征。该材料表现出p型半导体行为，并分析了它们在200至500摄氏度的温度范围内对H-2，CO，NO，NO2和丙烯的敏感性。此外，研究了LnFeO（3）材料的时间分辨响应。观察到的Ln-O的结合能和传感性能之间的相关性。
Nanoparticulate perovskite-type LnBO(3) (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tin, Yb, Lu; B = Cr, Fe) oxides are prepared by polyol-mediated synthesis. X-ray diffraction is used to confirm the structure of the materials, and scanning electron microscopy is applied to image the sample morphology. The powders are used for the preparation of suspensions that are deposited as thick films on comb-type Pt electrodes on alumina substrates. Electrical characterization is performed by using high-throughput impedance spectroscopy. The materials exhibit p-type semiconductor behavior, and their sensitivity towards H-2, CO, NO, NO2, and propylene in a temperature range from 200 to 500 degrees C is analyzed. In addition, the time-resolved response of the LnFeO(3) materials is investigated. A correlation between the Ln-O binding energy and the sensing properties is observed.