厦门大学侯旭课题组的最新研究提出了通过水界面过滤和吸收以实现空气的连续净化。相关论文于2022年9月26日发表于国际顶尖学术期刊《自然》杂志上。
空气微粒污染对人体健康的不利影响加速了可以过滤空气中微粒的空气净化系统的发展。为了保持性能，过滤器单元不可避免地在某个时候需要被更换和维护，这增加了成本，且会产生固体废物。在这项研究中，课题组展示了一种浸有特定功能液体的离子掺杂的共轭聚合物涂层基质，可实现高效、持续和免维护的空气净化。当需要净化的空气以气泡的形式通过系统时，功能液体为过滤和去除空气中的颗粒物和污染物分子提供了界面。
理论建模和实验结果表明，该系统具有较高的效率和稳健性：一次性空气净化效率可达99.6%，吸尘能力可达950 g/m2。该系统经久耐用，耐污染和腐蚀，作为过滤器的液体可以重新使用，也可以调整为去除细菌或其他臭味的液体。研究人员预计，他们的净化方法可以在医院、工厂和矿山等环境中作为特殊的空气净化器来开发。
附：英文原文
Title: Continuous air purification by aqueous interface filtration and absorption
Author: Zhang, Yunmao, Han, Yuhang, Ji, Xiaoliang, Zang, Duyang, Qiao, Long, Sheng, Zhizhi, Wang, Chunyan, Wang, Shuli, Wang, Miao, Hou, Yaqi, Chen, Xinyu, Hou, Xu
Issue&Volume: 2022-09-26
Abstract: The adverse impact of particulate air pollution on human health has prompted the development of purification systems that filter particulates out of air. To maintain performance, the filter units must inevitably be replaced at some point, which requires maintenance, involves costs and generates solid waste. Here we show that an ion-doped conjugated polymer-coated matrix infiltrated with a selected functional liquid enables efficient, continuous and maintenance-free air purification. As the air to be purified moves through the system in the form of bubbles, the functional fluid provides interfaces for filtration and for removal of particulate matter and pollutant molecules from air. Theoretical modelling and experimental results demonstrate that the system exhibits high efficiency and robustness: its one-time air purification efficiency can reach 99.6%, and its dust-holding capacity can reach 950gm2. The system is durable and resistant to fouling and corrosion, and the liquid acting as filter can be reused and adjusted to also enable removal of bacteria or odours. We anticipate that our purification approach will be useful for the development of specialist air purifiers that might prove useful in a settings such as hospitals, factories and mines.
DOI: 10.1038/s41586-022-05124-y
Source: https://www.nature.com/articles/s41586-022-05124-y