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UV-enhanced NO2 gas sensing properties of polystyrene sulfonate functionalized ZnO nanowires at room temperature
Inorganic Chemistry Frontiers ( IF 7 ) Pub Date : 2018-11-15 00:00:00 , DOI: 10.1039/c8qi01110a
Jing Wang 1, 2, 3, 4, 5 , Mingying Yu 1, 2, 3, 4, 5 , Xian Li 6, 7, 8, 9, 10 , Yi Xia 10, 11, 12, 13
Affiliation  

Polystyrene sulfonate (PSS) functionalized ZnO nanowires were hydrothermally synthesized and assembled into a UV-activated optoelectronic NO2 sensor for the first time. In situ PSS functionalization during hydrothermal synthesis not only facilitated the formation of high-quality ZnO nanowires with small diameters and high aspect ratios, but also significantly improved the UV photoconductance of ZnO nanowires through photo-induced electron injection, leading to the enhanced optoelectronic properties of ZnO nanowires. The optoelectronic NO2 sensors based on PSS-functionalized ZnO nanowires showed much higher responses and faster response rates under UV illumination at room temperature (25 °C). The responses ranged from 60% to 690% toward NO2 concentrations of 50 ppb to 2 ppm. Moreover, the optoelectronic sensors exhibited excellent reversibility, good stability and a low detection limit (5 ppb), making the efficient, optically controlled sensing of ppb-level NO2 gas possible.

中文翻译:

室温下聚苯乙烯磺酸盐官能化的ZnO纳米线的 UV增强NO 2气敏特性

水热合成聚苯乙烯磺酸盐(PSS)功能化的ZnO纳米线,并首次将其组装到UV激活的光电NO 2传感器中。水热合成过程中的原位PSS功能化不仅促进了小直径高纵横比的高质量ZnO纳米线的形成,而且还通过光致电子注入显着提高了ZnO纳米线的紫外光电导,从而增强了ZnO纳米线的光电性能。 ZnO纳米线。基于PSS功能化ZnO纳米线的光电NO 2传感器在室温(25°C)的紫外线照射下显示出更高的响应速度和更快的响应速度。对NO 2的响应范围从60%到690%浓度为50 ppb至2 ppm。此外,光电传感器具有出色的可逆性,良好的稳定性和较低的检测极限(5 ppb),从而可以对ppb级NO 2气体进行有效的光学控制感测。
更新日期:2018-11-15
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