Liu Li, Zhou Linglin, Liu Di, Yuan Wei, Chen Shengyang, Li Hexing, Bian Zhenfeng, Wang Jie, Wang Zhong Lin
Education Ministry Key and International Joint Lab of Resource Chemistry and Shanghai Key Lab of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China.
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China.
ACS Nano. 2021 Mar 23;15(3):5478-5485. doi: 10.1021/acsnano.1c00233. Epub 2021 Feb 18.
With the excellent structural design, rotary triboelectric nanogenerator (R-TENG) is suitable for harvesting mechanical energy such as wind energy and water energy to build a self-powered electrochemical system for environmental science. The electrochemical performance has been greatly improved by using the pulsed direct-current (PDC) output of a TENG; however, a full-wave PDC (FW-PDC) is hardly realized in R-TENG devices due to existence of phase superposition. Here, a R-TENG with FW-PDC output is reported to perform a self-powered electro-Fenton system for enhancing the removal efficiency of levofloxacin (OFL). By adjusting the rotation center angle ratio between each rotator and stator unit, the phase superposition of R-TENG caused by multiple parallel electrodes can be effectively eliminated, thus achieving the desired FW-PDC output. Because of the reduced electrode passivation effect, the removal efficiency of OFL is improved by 30% under equal electric charges through using the designed R-TENG with FW-PDC output compared to traditional R-TENG. This study provides a promising methodology to improve the performance of self-powered electrochemical process for treating environment pollutions.
凭借出色的结构设计，旋转摩擦纳米发电机（R-TENG）适用于收集风能和水能等机械能，以构建用于环境科学的自供电电化学系统。通过使用摩擦纳米发电机的脉冲直流（PDC）输出，电化学性能得到了极大提高；然而，由于相位叠加的存在，在R-TENG装置中很难实现全波PDC（FW-PDC）。在此，报道了一种具有FW-PDC输出的R-TENG，用于执行自供电电芬顿系统，以提高左氧氟沙星（OFL）的去除效率。通过调整每个转子和定子单元之间的旋转中心角比，可以有效消除由多个平行电极引起的R-TENG的相位叠加，从而实现所需的FW-PDC输出。由于电极钝化效应的降低，与传统R-TENG相比，使用具有FW-PDC输出的设计R-TENG在相同电荷量下，OFL的去除效率提高了30%。本研究为提高自供电电化学过程处理环境污染的性能提供了一种有前景的方法。
