Song Yaping, Xia Yihan, Zhang Wei, Yu Yunlong, Cui Yanyu, Liu Lichao, Zhang Tong, Liu Sen, Zhao Hongran, Fei Teng
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.
College of Naval Architecture and Ocean Engineering, Naval University of Engineering, P.O. Box No. 076, Wuhan 430033, China.
Sensors (Basel). 2024 Dec 20;24(24):8154. doi: 10.3390/s24248154.
Owing to its extensive use and intrinsic toxicity, NH detection is very crucial. Moisture can cause significant interference in the performance of sensors, and detecting NH in high humidity is still a challenge. In this work, a humidity-activated NH sensor was prepared by urocanic acid (URA) modifying poly (ethylene glycol) diacrylate (PEGDA) via a thiol-ene click cross-linking reaction. The optimized sensor achieved a response of 70% to 50 ppm NH at 80% RH, with a response time of 105.6 s and a recovery time of 346.8 s. The sensor was improved for response and recovery speed. In addition, the prepared sensor showed excellent selectivity to NH in high-humidity environments, making it suitable for use in some areas with high humidity all the year round or in high-humidity areas such as the detection of respiratory gas. A detailed investigation of the humidity-activated NH-sensing mechanism was conducted using complex impedance plot (CIP) measurements.
由于氨气的广泛使用及其内在毒性，氨气检测至关重要。水分会对传感器性能造成显著干扰，在高湿度环境下检测氨气仍是一项挑战。在本工作中，通过尿刊酸（URA）经由硫醇-烯点击交联反应修饰聚（乙二醇）二丙烯酸酯（PEGDA）制备了一种湿度激活的氨气传感器。优化后的传感器在80%相对湿度下对50 ppm氨气的响应为70%，响应时间为105.6秒，恢复时间为346.8秒。该传感器在响应和恢复速度方面得到了改进。此外，所制备的传感器在高湿度环境下对氨气表现出优异的选择性，使其适用于常年高湿度的一些地区或高湿度区域，如呼吸气体检测。利用复阻抗谱（CIP）测量对湿度激活氨气传感机制进行了详细研究。
