A selective NH3 gas sensor based on Fe2O3-ZnO nanocomposites at room temperature
A selective NH3 gas sensor based on Fe2O3-ZnO nanocomposites at room temperature
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DOI：
10.1016/j.snb.2005.08.010
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发表时间：
2006-04-26
影响因子：
8.4
通讯作者：
Yang, DR
中科院分区：
文献类型：
--
作者：
Tang, HX;Yan, M;Yang, DR
采用溶胶-凝胶法和旋涂法制备了不同Fe：Zn含量的Fe 2 O3-ZnO纳米复合材料气敏元件。采用透射电子显微镜（TEM）、X射线衍射（XRD，D/max-rA）和能量色散X射线分析（EDX）对Fe 2 O3-ZnO纳米复合材料的形貌进行了表征。电学和传感测试结果表明，Fe：Zn=2%的传感器在室温下对NH3具有较好的灵敏度和选择性。传感器的响应时间和恢复时间均小于20 s。最后，对提高气敏性能的机理进行了探讨。(c)2005 Elsevier B. V.保留所有权利。
Gas sensors based on the Fe2O3-ZnO nanocomposites with different compositions of Fe:Zn was prepared by a sol-gel and spin-coating method. Morphology of the Fe2O3-ZnO nanocomposites was characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD, D/max-rA) and energy dispersive X-ray analysis (EDX). The results of electrical and sensing measurement indicated that the sensor with Fe:Zn=2% exhibited fairly excellent sensitivity and selectivity to NH3 at room temperature. The response and recovery time of the sensor were both less than 20 s. Finally, the mechanism for the improvement in the gas sensing properties was discussed. (c) 2005 Elsevier B.V. All rights reserved.