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Poly(4-styrenesulfonic acid) doped polypyrrole/tungsten oxide/reduced graphene oxide nanocomposite films based surface acoustic wave sensors for NO sensing behavior
Organic Electronics ( IF 3.2 ) Pub Date : 2020-11-04 , DOI: 10.1016/j.orgel.2020.106006
Tien-Tsan Hung , Mei-Hui Chung , Jing-Jie Chiu , Min-Wen Yang , Ting-Nan Tien , Chi-Yen Shen

Poly(4-styrenesulfonic acid) (PSSA) doped polypyrrole (PPy)/tungsten oxide (WO3)/reduced graphene oxide (rGO) hybrid nanocomposite have been successfully synthesized using appropriate amounts of PSSA, pyrrole monomer, WO3, and rGO dispersed in aqueous solution through in situ chemical oxidation polymerization. Here, a simple spin coating method was used to fabricate a nitric oxide (NO) gas sensor composed of the aforementioned nanocomposite on a surface acoustic wave (SAW) resonator. This sensor can detect NO gas at concentrations of 1–110 parts per billion (ppb) at room temperature in dry air, with a sensitivity of 12 Hz/ppb and response and recovery times of <2 min. Moreover, its limit of detection (LOD) is 0.31 ppb for a signal to noise ratio of 3. It demonstrates repeatability, fast response, and recovery at room temperature. Moreover, its sensory performance remains highly stable over 30 days with only a 6.3% decrease in sensitivity. In addition, the sensor is highly selective for NO, even when nitrogen dioxide, ammonia, and carbon dioxide are applied as interfering gases. The inclusion of rGO (with large specific surface area) and the synergic effect of n-type WO3 nanoparticles in the p-type PPy matrix (leading to p-n heterojunction region formation) possibly underlie the efficient sensing performance of our sensor.



中文翻译:

基于聚(4-苯乙烯磺酸)的聚吡咯/氧化钨/氧化石墨烯纳米复合薄膜的表面声波传感器对NO的传感行为

已使用适当量的PSSA,吡咯单体,WO 3成功地合成了聚(4-苯乙烯磺酸)(PSSA)掺杂的聚吡咯(PPy)/氧化钨(WO 3)/还原氧化石墨烯(rGO)杂化纳米复合材料。和rGO通过原位化学氧化聚合分散在水溶液中。在此,使用简单的旋涂方法在表面声波(SAW)谐振器上制造由上述纳米复合材料组成的一氧化氮(NO)气体传感器。该传感器可以在室温下的干燥空气中检测出浓度为1–110十亿分之一(ppb)的NO气体,灵敏度为12 Hz / ppb,响应和恢复时间小于2分钟。此外,其信噪比为3时,其检出限(LOD)为0.31 ppb。它显示出可重复性,快速响应和在室温下的恢复。此外,其感官性能在30天内保持高度稳定,灵敏度仅下降6.3%。此外,即使二氧化氮,氨,和二氧化碳被用作干扰气体。rGO(具有大的比表面积)的包含和n型WO的协同作用p型PPy矩阵中的3个纳米粒子(导致pn异质结区域的形成)可能是我们传感器高效传感性能的基础。

更新日期:2020-11-09
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