Fluidic nanogenerators have attracted increasing interests in applications of distributed electronics and self-powered systems. Here, we report a novel electrokinetic conversion device composed of an anodic aluminum oxide membrane, deionized water, and titanium oxide electrodes. Under ultraviolet light illumination, the electrokinetic device outputs stable and continuous short-circuit current without any electrode consumption or external circulation of ions. Based on the output behavior of the device at different pressures and light intensities, an interaction mechanism between the electrokinetic effects in nanochannels and ultraviolet light–induced radical recycle at the electrodes is proposed. The radical recycle process transfers charges between ions and electrons to achieve stable streaming current in electrokinetic systems, while streaming current induced positive and negative ions acumination facilities the radical recycle process. These results bring new insights into the charge transfer process in fluidic energy conversion devices and provide a new way to construct light-assisted microfluidic energy conversion systems.

流体纳米发电机在分布式电子设备和自供电系统的应用中引起了越来越多的兴趣。在这里，我们报告一种新型的由阳极氧化铝膜，去离子水和氧化钛电极组成的电动转换装置。在紫外光照射下，电动装置输出稳定且连续的短路电流，而不会消耗任何电极或造成离子的外部循环。基于该装置在不同压力和光强度下的输出行为，提出了纳米通道中的电动效应与电极上紫外线诱导的自由基循环之间的相互作用机理。自由基循环过程在离子和电子之间转移电荷，从而在电动系统中实现稳定的流动电流，而流过的电流引起的正负离子电积促进了自由基循环过程。这些结果为流体能量转换装置中的电荷转移过程带来了新的见解，并为构建光辅助微流体能量转换系统提供了新的途径。