Preparation and characterization of La1−xSrxFeO3 materials and their formaldehyde gas-sensing properties
Preparation and characterization of La1−xSrxFeO3 materials and their formaldehyde gas-sensing properties
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DOI：
10.1007/s10853-012-6758-7
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发表时间：
2012
影响因子：
4.5
通讯作者：
PengJun Yao;Jing Wang;Wenfei Chu;Yuwen Hao
中科院分区：
文献类型：
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作者：
PengJun Yao;Jing Wang;Wenfei Chu;Yuwen Hao
采用溶胶-凝胶法合成了La 1 − xSrxFeO 3（x= 0.0-1.0）纳米粒子。采用热重/差热分析（TG/DTA）、X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对样品进行表征。La 1 − xSrxFeO 3（x= 0.0-1.0）材料在650 °C下烧结。通过XRD数据的分析，给出了La 1 − xSrxFeO 3的结构特性和随Sr含量增加的相变。研究了La 1 − xSrxFeO 3的甲醛气敏特性。实验结果表明，La 1 − xSrxFeO 3的最佳工作温度随x中Sr含量的变化而变化。在所有的样品中，La0.7Sr0.3FeO3表现出最大的响应甲醛。最后对甲醛气敏机理进行了探讨。
La1−xSrxFeO3(x= 0.0–1.0) nanoparticles have been synthesized by a sol–gel method. The samples are characterized by thermogravimetric/differential thermal analysis (TG/DTA), X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The La1−xSrxFeO3(x= 0.0–1.0) materials have been sintered at 650 °C. Both the structural properties and phase transitions with increasing strontium content in La1−xSrxFeO3are presented by analysis of XRD data. Formaldehyde gas-sensing properties of La1−xSrxFeO3have been investigated. The experimental results show that the optimum operating temperatures of La1−xSrxFeO3varies with Sr content ofx. Among all the samples, La0.7Sr0.3FeO3shows a maximum response to formaldehyde. Finally, the formaldehyde gas-sensing mechanism has been presented.