Enhanced BTEX gas-sensing performance of CuO/SnO2 composite
Enhanced BTEX gas-sensing performance of CuO/SnO2 composite
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CuO/SnO2 复合材料增强 BTEX 气敏性能
DOI：
10.1016/j.snb.2015.09.140
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发表时间：
2016-02-01
影响因子：
8.4
通讯作者：
Xu, Jiaqiang
中科院分区：
文献类型：
--
作者：
Ren, Fumin;Gao, Liping;Xu, Jiaqiang
利用催化氧化原理设计了一系列CuO/SnO 2复合材料，用于选择性地对苯系物（苯、甲苯、二甲苯、甲苯）进行传感。传感材料的制备通过一个简单的微波辅助的方法。采用X射线衍射（XRD）、场发射扫描电子显微镜（FESEM）、透射电子显微镜（TEM）和高分辨透射电子显微镜（HRTEM）对复合材料进行了表征。TEM结果表明，所制备的SnO 2为纳米级多孔粒子。对于3mol%CuO/SnO 2复合材料，EDS和HRTEM证实了CuO纳米粒子的存在。侧热式传感器的气敏实验结果表明，CuO/SnO 2复合传感器对苯系物的响应优于SnO 2传感器，而对乙醇、丙酮、甲醇、甲醛和氨等VOCs的响应则优于SnO 2传感器。在这些CuO/SnO_2复合材料中，基于3mol%CuO/SnO_2复合材料的传感器对苯系物具有最好的选择性和灵敏度。在280 ℃的最佳工作温度下，传感器对50 ppm苯系物的响应值超过6倍。3mol%CuO/SnO_2基苯系物气敏元件对苯系物的优良气敏性能主要归因于催化剂CuO的加入。(C)2015 Elsevier B. V.版权所有。
Series CuO/SnO2 composites for selectively sensing BTEX (benzene, toluene, ethylbenzene, and xylol) designed by a principle of catalytic oxidation were synthesized. The sensing materials were prepared by a facile microwave-assisted approach. The composites were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM). TEM results reveal that the as-prepared SnO2 are nanoscaled porous particles. For 3 mol% CuO/SnO2 composite, the existence of CuO nanoparticles is proved by EDS and HRTEM. Gas sensing results of side-heating sensors display that the CuO/SnO2 composites sensors compared with pristine SnO2 sensor have much better responses to BTEX rather than other VOCs such as ethanol, acetone, methanol, formaldehyde and ammonia. Among these CuO/SnO2 composites, the sensor based on 3 mol% CuO/SnO2 composite has the best selectivity and sensitivity for BTEX. At the optimal working temperature of 280 degrees C, the response value of the sensor to 50 ppm BTEX are more than 6 times. Excellent gas sensitive performance of 3 mol% CuO/SnO2 based sensor to BTEX belongs to the addition of catalyst CuO. (C) 2015 Elsevier B.V. All rights reserved.