Yang Dehong, Liu Zhaoqi, Yang Peng, Huang Ling, Huang Fengjiao, Tao Xinglin, Shi Yuxiang, Lei Rui, Cao Jiazhen, Li Hexing, Chen Xiangyu, Bian Zhenfeng
MOE Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China.
CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China.
Nanoscale. 2023 Apr 6;15(14):6709-6721. doi: 10.1039/d3nr00507k.
Efficient removal of air pollution caused by volatile organic compounds (VOCs) and particulate matter (PM) through distributed energy collected from the environment is an effective strategy to achieve both energy conservation and better air quality. Herein, a curtain purification system based on a rabbit fur-based rotary triboelectric nanogenerator (RR-TENG) and a collaborative photocatalysis technology was designed for indoor air purification. The high electrostatic field from RR-TENG enhances formaldehyde adsorption, while it can also efficiently adsorb PM simultaneously. More interestingly, the ultrahigh electric field provided by RR-TENG promotes the separation of photogenerated electron-hole pairs of the g-CN/TiO composite photocatalyst, generating more superoxide radicals (⋅O), hydroxyl radicals (⋅OH), and holes (h) and thereby improving the photocatalytic efficiency. In a simulated reaction chamber of 9 L, the formaldehyde removal rate of the system can reach 79.2% within 90 min and RR-TENG rapidly reduces PM from 999 μg m to 50 μg m within 60 s. This study proposes a curtain purification system integrating the function of energy collection and photocatalytic purification, which can be applied for improving air quality and human health.
通过收集环境中的分布式能量来有效去除挥发性有机化合物（VOCs）和颗粒物（PM）所造成的空气污染，是实现节能和改善空气质量的有效策略。在此，设计了一种基于兔毛基旋转摩擦纳米发电机（RR-TENG）和协同光催化技术的窗帘净化系统用于室内空气净化。RR-TENG产生的高静电场增强了甲醛吸附，同时还能有效吸附PM。更有趣的是，RR-TENG提供的超高电场促进了g-CN/TiO复合光催化剂光生电子-空穴对的分离，产生更多的超氧自由基（⋅O）、羟基自由基（⋅OH）和空穴（h），从而提高了光催化效率。在9L的模拟反应室内，该系统的甲醛去除率在90分钟内可达79.2%，RR-TENG在60秒内可将PM从999μg/m迅速降至50μg/m。本研究提出了一种集能量收集和光催化净化功能于一体的窗帘净化系统，可用于改善空气质量和人类健康。
