Frontiers Science Center for High Energy Material, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China.
ACS Appl Mater Interfaces. 2020 Oct 14;12(41):46057-46064. doi: 10.1021/acsami.0c12693. Epub 2020 Oct 2.
There is an increasing need to maintain the indoor humidity at a comfortable and healthy level without relying on high energy-consuming and potentially germ-infested air-conditioning systems. Water adsorbents exhibiting reversible moisture adsorption/desorption ability as well as sufficient antibacterial activity are highly expected to achieve humidity control in an autonomous and safe way. Metal-organic frameworks (MOFs) featuring high porosity and designability show potential in meeting these requirements in a singular platform. Given the low toxicity and the rich abundance of aluminum in nature, a family of isoreticular Al-terephthalate-based MOFs were systematically evaluated in terms of the static and kinetic water adsorption/desorption and the photocatalytic bacteria-killing behavior. In particular, CAU-1-OH exhibits a desired working range (40-60% RH), a high working capacity (0.41 g g), an excellent cycle performance (500 cycles), and a high photocatalytic killing efficiency (99.94%) against . As a proof of concept, the air filter prepared by coating CAU-1-OH on a commercial nonwoven fabric is capable of buffering against sudden humidity changes caused by the infiltration of outside air and effectively reducing the contamination of bioaerosol or particulate matter. The study significantly advanced the development of next-generation water adsorbents with antibacterial activity for residential humidity control.
人们越来越需要在不依赖高能耗且可能滋生细菌的空调系统的情况下，将室内湿度维持在舒适和健康的水平。具有可逆吸湿/解吸能力以及足够抗菌活性的水吸附剂有望以自主和安全的方式实现湿度控制。具有高孔隙率和可设计性的金属-有机骨架（MOFs）在单一平台上满足这些要求方面显示出潜力。鉴于铝的低毒性和自然界中的丰富性，系统地评估了一系列基于等网状铝对苯二甲酸的 MOFs 的静态和动态水吸附/解吸以及光催化杀菌行为。特别是，CAU-1-OH 表现出理想的工作范围（40-60% RH）、高工作容量（0.41 gg）、优异的循环性能（500 次循环）和对 的高光催化杀菌效率（99.94%）。作为概念验证，通过将 CAU-1-OH 涂覆在商业无纺布上制备的空气过滤器能够缓冲因外部空气渗透引起的突然湿度变化，并有效降低生物气溶胶或颗粒物的污染。该研究显著推进了具有抗菌活性的下一代水吸附剂的开发，用于住宅湿度控制。
