Liu Shizhe, Liu Yang, Chen Ye, Wang Shuaitong, Men Chuanbin, Gao Shuyan
School of Materials Science and Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China.
School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China.
ACS Appl Mater Interfaces. 2022 Apr 20;14(15):17426-17433. doi: 10.1021/acsami.2c01750. Epub 2022 Apr 8.
It is an ideal way to use triboelectric nanogenerators (TENGs) to capture energy from the environment for the degradation of organic contaminants in water as a zero-carbon pathway. However, there is an urgent need to further develop TENGs with a simple structure and high output power. Herein, a novel TENG with a vortex-like flexible self-recovery blades of inner stator (denoted as VFR-TENG) is designed and manufactured with the assistance of a fused deposition modeling 3D printing technology. With the rotation of the outer rotor, a facile rotating contact-separation mode is achieved by the alternating arrangement of the flexible self-recovery blades. The contact tightness of the friction layer, a key factor for the transfer of charge density, can be easily adjusted by the thickness and arrangement style of the flexible self-recovery blades. The regulation of material elasticity and rotational frequency on the output characteristics is further investigated based on the special flexible structure. The VFR-TENG exhibits an instantaneous short-circuit current of 350 μA, an open-circuit voltage of 650 V, a transferred charge of 1.1 μC, and an optimum output power density of 4.4 W·m. This high-performance VFR-TENG is used for electrochemical degradation systems, which achieves excellent degradation efficiencies of 88.9, 91.7, and 94.1% for methylene blue, methyl orange, and malachite green within 150 min, respectively. This work provides a new idea for the design of flexible self-recovery contact-separation TENGs, which is of great inspiration for the exploitation of TENGs with both the high peak current and high-frequency characteristics for efficient water treatment.
利用摩擦纳米发电机（TENGs）从环境中捕获能量以降解水中有机污染物作为零碳途径是一种理想方式。然而，迫切需要进一步开发结构简单且输出功率高的TENGs。在此，借助熔融沉积建模3D打印技术设计并制造了一种具有内定子涡状柔性自恢复叶片的新型TENG（表示为VFR-TENG）。随着外转子的旋转，通过柔性自恢复叶片的交替排列实现了一种简便的旋转接触-分离模式。电荷密度转移的关键因素——摩擦层的接触紧密性，可通过柔性自恢复叶片的厚度和排列方式轻松调节。基于这种特殊的柔性结构，进一步研究了材料弹性和旋转频率对输出特性的影响。VFR-TENG表现出350 μA的瞬时短路电流、650 V的开路电压、1.1 μC的转移电荷以及4.4 W·m的最佳输出功率密度。这种高性能的VFR-TENG用于电化学降解系统，在150分钟内分别对亚甲基蓝、甲基橙和孔雀石绿实现了88.9%、91.7%和94.1%的优异降解效率。这项工作为柔性自恢复接触-分离TENGs的设计提供了新思路，对开发具有高峰值电流和高频特性的TENGs用于高效水处理具有很大的启发意义。
