一种多孔电极氨气传感器的制备方法及性能检测
发布时间:2018-04-24 22:33
本文选题:氨气 + 传感器 ; 参考:《仪表技术与传感器》2017年11期
【摘要】:为了提高传感器的灵敏度和使用寿命,利用化学还原法制备了钌催化剂并对其进行了X射线衍射(XRD)表征。在电极制备过程中,钌催化剂与造孔剂硝酸钾的质量比为2∶1,利用丝网印刷技术制备出多孔电极。将未加造孔剂和加造孔剂的电极分别进行了扫描电镜(SEM)表征并组装成传感器,在同等条件下对氨气进行检测,分别通入不同浓度氨气标准气体,测得其灵敏度分别为230μA和450μA,响应时间分别为103 s和40 s,恢复时间分别为115 s和60 s。加入造孔剂后,灵敏度提高了49%,响应时间和恢复时间分别缩短了63 s和55 s,显著提高了氨气传感器的性能。
[Abstract]:In order to improve the sensitivity and service life of the sensor, ruthenium catalyst was prepared by chemical reduction method and characterized by X-ray diffraction (XRD). In the process of electrode preparation, the mass ratio of ruthenium catalyst and pore-making agent potassium nitrate was 2: 1. The porous electrode was prepared by screen printing technology. The electrodes without pore-making agent and pore-making agent were characterized by scanning electron microscope (SEM) and assembled into a sensor. Ammonia gas was detected under the same conditions and passed into different concentrations of ammonia gas. The sensitivity is 230 渭 A and 450 渭 A, the response time is 103 s and 40 s, and the recovery time is 115 s and 60 s, respectively. After the addition of pore-forming agent, the sensitivity was increased by 49, the response time and recovery time were shortened by 63 s and 55 s, respectively, and the performance of ammonia gas sensor was improved significantly.
【作者单位】: 吉林省电力科学研究院有限公司;中国科学院长春应用化学研究所;
【分类号】:TP212
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