Wang Dongyue, Zhang Dongzhi, Yang Yan, Mi Qian, Zhang Jianhua, Yu Liandong
College of Control Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China.
ACS Nano. 2021 Feb 23;15(2):2911-2919. doi: 10.1021/acsnano.0c09015. Epub 2021 Feb 7.
Self-powered sensors are crucial in the field of wearable devices and the Internet of Things (IoT). In this paper, an organ-like TiCT MXene/metal-organic framework-derived copper oxide (CuO) gas sensor was powered by a triboelectric nanogenerator (TENG) based on latex and polytetrafluoroethylene for the detection of ammonia (NH) at room temperature. The peak-to-peak value of open-circuit voltage and short-circuit current generated by the prepared TENG can reach up to 810 V and 34 μA, respectively. The TENG can support a maximum peak power density of 10.84 W·m and light at least 480 LEDs. Moreover, a flexible TENG under a single-electrode working mode was demonstrated for human movement stimulation, which exhibits great potential in wearable devices. The self-powered NH sensor driven by TENG has an excellent response (/ = 24.8 @ 100 ppm) at room temperature and exhibits a great potential in monitoring pork quality. TiCT MXene and CuO were characterized by SEM, TEM, EDS, XRD, and XPS to analyze the properties of the materials. The NH sensing performance of the self-powered sensor based on MXene/CuO was greatly improved, and the mechanism of the enhanced sensing properties was systematically discussed.
自供电传感器在可穿戴设备和物联网（IoT）领域至关重要。本文中，一种类似器官的TiCT MXene/金属有机框架衍生的氧化铜（CuO）气体传感器由基于乳胶和聚四氟乙烯的摩擦纳米发电机（TENG）供电，用于在室温下检测氨气（NH）。所制备的TENG产生的开路电压峰峰值和短路电流分别可达810 V和34 μA。该TENG可支持的最大峰值功率密度为10.84 W·m ，并能点亮至少480个发光二极管。此外，还展示了一种单电极工作模式下的柔性TENG用于人体运动刺激，其在可穿戴设备中具有巨大潜力。由TENG驱动的自供电NH传感器在室温下具有出色的响应（/ = 24.8 @ 100 ppm），并且在监测猪肉质量方面具有巨大潜力。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）、能谱仪（EDS）、X射线衍射仪（XRD）和X射线光电子能谱仪（XPS）对TiCT MXene和CuO进行了表征，以分析材料的性能。基于MXene/CuO的自供电传感器的NH传感性能得到了极大提高，并系统地讨论了传感性能增强的机制。
