Heterostructure of CuO microspheres modified with CuFe2O4 nanoparticles for highly sensitive H2S gas sensor
Heterostructure of CuO microspheres modified with CuFe2O4 nanoparticles for highly sensitive H2S gas sensor
复制标题
CuFe2O4纳米粒子修饰的CuO微球异质结构用于高灵敏H2S气体传感器
DOI：
10.1016/j.snb.2018.02.110
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发表时间：
2018-07-01
影响因子：
8.4
通讯作者：
Zheng, Liaoying
中科院分区：
文献类型：
--
作者：
Hu, Xiaobing;Zhu, Zhigang;Zheng, Liaoying
利用CuO微球表面修饰CuFe 2 O 4纳米颗粒的半导体异质结构，研制了高灵敏度的H2S气体传感器。CuO微球的制备利用一个简单的加热路线进行了水浴，而CuFe 2 O 4改性的CuO进行了一个简单的两步法。通过X射线衍射、扫描电子显微镜、透射电子显微镜、能量色散X射线光谱和电感耦合等离子体原子发射光谱对样品的形貌和特征进行了研究。在不同的工作温度下，H2S气敏性能进行了研究，其依赖于CuFe 2 O 4与CuO的摩尔比也进行了研究。结果表明，优化的CuFe 2 O 4-改性的CuO异质结构的响应，以10 ppm的H2S气体是约20倍高于初始的CuO微球在最佳操作温度（240 ℃）。此外，还注意到了快速的响应/恢复，并深入讨论了这种异质结构增强传感性能的机制。(C)2018 Elsevier B. V.版权所有。
Highly sensitive hydrogen sulfide (H2S) gas sensors were developed from a semiconducting heterostructure composed of CuO microspheres whose surface was modified with CuFe2O4 nanoparticles. The CuO microspheres were fabricated utilizing a simple heating route carried out in a water bath, while CuFe2O4 modification of CuO was carried out by a facile two-step method. The morphology and characteristics of the samples were examined by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, and inductively coupled plasma atomic emission spectrometry. The H2S gas sensing properties were examined at different operating temperatures, and their dependence on molar ratio of CuFe2O4 to CuO was also investigated. Results showed that the response of the optimized CuFe2O4-modified CuO heterostructures to 10 ppm H2S gas was approximately 20 times higher than that of the initial CuO microspheres at the optimal operating temperature (240 degrees C). Moreover, a fast response/recovery was also noticed, and the mechanism for enhanced sensing properties of such heterostructures was thoroughly discussed. (C) 2018 Elsevier B.V. All rights reserved.