| 基于CuO-Co3O4的催化燃烧型一氧化碳传感器 |
| Catalytic Combustion Type Carbon Monoxide Sensor Based on CuO-Co3O4 Catalyst |
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| 摘要: 采用共沉淀法制备了CuO-Co3O4复合材料,并以其为催化剂,负温度系数热敏电阻(NTCT)为加热电阻,制备了一种催化燃烧型CO传感器,该传感器对CO的定量限为0.034 9 mg·L-1。利用X射线衍射(XRD)和场发射扫描电子显微镜(FESEM)对复合材料的物相和表面形貌进行表征。当CuO-Co3O4的煅烧温度为400 ℃时,传感器对CO的灵敏度最高。在桥电压为9 V,CO的浓度为0.034 9～0.582 mg·L-1时,传感器的响应信号与CO浓度之间呈现良好的线性关系,线性相关系数为0.979。90%的响应和恢复时间分别为24 s和68 s。 |
| 关键词: 传感器 空气污染和工业卫生 铜 钴 CuO-Co3O4 负温度系数热敏电阻 催化燃烧型 |
| 基金项目: |
| Abstract: Composite material CuO-Co3O4 was prepared by a co-precipitation method. A catalytic combustion CO sensor was fabricated by using CuO-Co3O4 as the sensing material and NTCT (Negative Temperature Coefficient Thermistor) as the heating resistance. The limit of quantification for the sensor is 0.034 9 mg·L-1. The phase composition and surface morphology of the composite material were characterized by X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM). When the calcination temperature of CuO-Co3O4 is 400 ℃, the sensor' s sensitivity to CO reaches maximum. The sensor shows good linear relationship between response signals and CO concentration from 0.034 9 to 0.582 mg·L-1 at the operating voltage of 9 V and the linear correlation coefficient is 0.979. The 90% response and recovery time to 0.582 mg·L-1 CO is 24 s and 68 s, respectively. |
| Keywords: sensors air pollution and industrial hygiene copper cobalt CuO-Co3O4 negative temperature coefficient thermistor catalytic combustion |
| 投稿时间：2012-12-07 修订日期：2013-02-28 |
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| 黄彩霞,高国强.基于CuO-Co3O4的催化燃烧型一氧化碳传感器[J].无机化学学报,2013,29(6):1135-1140. |
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