一种基于铜离子掺杂聚苯胺/氧化钨纳米复合材料的室温一氧化氮气体传感器。

A room temperature nitric oxide gas sensor based on a copper-ion-doped polyaniline/tungsten oxide nanocomposite.

作者信息

Wang Shih-Han, Shen Chi-Yen, Su Jian-Ming, Chang Shiang-Wen

机构信息

Department of Chemical Engineering, I-Shou University, Kaohsiung 84001, Taiwan.

Department of Electrical Engineering, I-Shou University, Kaohsiung 84001, Taiwan.

出版信息

Sensors (Basel). 2015 Mar 24;15(4):7084-95. doi: 10.3390/s150407084.

DOI:10.3390/s150407084

PMID:25811223

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4431308/

Abstract

The parts-per-billion-level nitric oxide (NO) gas sensing capability of a copper-ion-doped polyaniline/tungsten oxide nanocomposite (Cu(2+)/PANI/WO3) film coated on a Rayleigh surface acoustic wave device was investigated. The sensor developed in this study was sensitive to NO gas at room temperature in dry nitrogen. The surface morphology, dopant distribution, and electric properties were characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy mapping, and Hall effect measurements, respectively. The Cu(2+)/PANI/WO3 film exhibited high NO gas sensitivity and selectivity as well as long-term stability. At 1 ppb of NO, a signal with a frequency shift of 4.3 ppm and a signal-to-noise ratio of 17 was observed. The sensor exhibited distinct selectivity toward NO gas with no substantial response to O2, NH3 and CO2 gases.

摘要

研究了涂覆在瑞利表面声波器件上的铜离子掺杂聚苯胺/氧化钨纳米复合材料（Cu(2+)/PANI/WO3）薄膜对十亿分之一级一氧化氮（NO）气体的传感能力。本研究开发的传感器在室温下于干燥氮气中对NO气体敏感。分别使用扫描电子显微镜、能量色散X射线光谱映射和霍尔效应测量对表面形态、掺杂剂分布和电学性质进行了表征。Cu(2+)/PANI/WO3薄膜表现出高NO气体灵敏度、选择性以及长期稳定性。在1 ppb的NO浓度下，观察到频率偏移为4.3 ppm且信噪比为17的信号。该传感器对NO气体表现出明显的选择性，对O2、NH3和CO2气体无明显响应。