Dielectric polymer materials are indispensable for the fabrication of self-powered nanosystem and electronic skin. However, the performance of the device is often seriously degraded due to the contamination of the surface. It is very important to keep the clean of the surface of the device, especially for the application of wearable devices. In this work, triboelectric nanogenerator (TENG) integrated with TiO₂ photocatalysis is developed for realizing the dual functions of energy generation and self-cleaning interface. The friction layer of TENG is sponged polydimethylsiloxane (PDMS) film which is prepared by sacrificial template method with the pore size varied from hundreds of microns to several millimeters. When the interface of TENG is contaminated by organic pollutants, the open circuit voltage (V_OC) of the device decrease from 125 V to 88 V. Under the solar illumination for 35 min, the self-cleaning interface can degrade the contaminants attached on the tribo-surface, while V_OC raises from 88 V to 115 V after illumination, indicating that 92% of the TENG’s output performance can be fully recovered. The photocatalysis-based self-cleaning effect on polymer tribo-material can contribute to the application of TENG towards e-skin and wearable devices.

介电聚合物材料对于制造自供电的纳米系统和电子皮肤是必不可少的。但是，由于表面的污染，该设备的性能通常会严重降低。保持设备表面的清洁非常重要，尤其是对于可穿戴设备的应用而言。在这项工作中，开发了集成有TiO ₂光催化的摩擦电纳米发生器（TENG），以实现能量产生和自清洁界面的双重功能。TENG的摩擦层是海绵海绵二甲基硅氧烷（PDMS）膜，它是通过牺牲模板法制备的，其孔径从几百微米到几毫米不等。当TENG的界面被有机污染物污染时，开路电压（设备的V _OC）从125 V降低到88V。在日光照射下35分钟，自清洁界面可以使附着在摩擦表面的污染物降解，而V _OC在光照后从88 V升高到115 V ，表明TENG的92％的输出性能可以完全恢复。对聚合物摩擦材料的基于光催化的自清洁作用可有助于TENG在电子皮肤和可穿戴设备上的应用。