Formaldehyde-sensing properties of LaFeO3 particles synthesized by citrate sol–gel method
Formaldehyde-sensing properties of LaFeO3 particles synthesized by citrate sol–gel method
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DOI：
10.1007/s10971-016-4025-0
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发表时间：
2016-03
影响因子：
2.5
通讯作者：
Yong Zhang;B. Jiang;Mengjia Yuan;Peiwen Li;Wei Li-;Xuejun Zheng
中科院分区：
文献类型：
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作者：
Yong Zhang;B. Jiang;Mengjia Yuan;Peiwen Li;Wei Li-;Xuejun Zheng
采用柠檬酸盐溶胶-凝胶法合成了LaFeO_3(LFO)粒子，并用X射线衍射仪、场发射扫描电子显微镜、透射电子显微镜、X射线光电子能谱、比表面和孔径分析仪对其进行了表征。为了研究甲醛(HCHO)的气敏特性，制作了基于LFO颗粒的侧热式气敏元件。在100℃的工作温度下，LFO颗粒气敏元件对甲醛具有较高的响应性和良好的选择性。在1-50ppm的甲醛浓度范围内，LFO颗粒气敏元件对甲醛的响应呈近似线性关系，线性相关系数为0.99。S的响应时间和恢复时间分别约为33和27。结果表明，用柠檬酸盐溶胶-凝胶法合成的LiFO粒子在制作高性能、低功耗的甲醛气敏元件方面具有潜在的应用前景。
AbstractLaFeO3(LFO) particles were synthesized by citrate sol–gel method and characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and specific surface and pore size analysis instrument. To investigate the formaldehyde (HCHO)-sensing properties, the side-heating gas sensor based on LFO particles was fabricated. The LFO particle-based gas sensor presented high response and good selectivity to HCHO at an operating temperature of 100 °C. At the range of 1–50 ppm HCHO, the LFO particle-based gas sensor exhibits a nearly linear response, and the linear correlation coefficient is 0.99. The response time and recovery time are about 33 and 27 s, respectively. The results indicate that LFO particles synthesized by citrate sol–gel method have potential applications for fabricating high-performance and low power consumption HCHO gas sensor.Graphical Abstract