School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu, 225002, P. R. China.
Small Methods. 2021 Dec;5(12):e2101070. doi: 10.1002/smtd.202101070. Epub 2021 Oct 20.
The protection and regeneration of the water environment is currently one of the most critical concerns for the sustainable development of human society. To solve the water crisis, the use of capacitive deionization (CDI) technology to extract fresh-water that is suitable for human consumption from abundant surface-water is a feasible solution. In this work, a cobalt benzimidazole frameworks (ZIF-9) derived carbon composites with a unique quasi-microcubic morphology is synthesized and used the as-prepared materials as an electrode material for the CDI. Interestingly, the ZIF-9 derived carbon composites exhibit an impressive desalination capacity of 55.4 mg g and can be reused. Measurements in surface-water (Beijing-Hangzhou Grand Canal, Slender West Lake, Initial rainwater, Rain water) show that this CDI technology based on ZIF-9 derived carbon composites not only has a strong adsorption effect on metal ions but also can remarkably kill microorganisms. The results show that the technology can effectively kill bacteria (Escherichia coli and Bacillus) and algae with 95% and 91.7% inhibition rates, respectively. This work provides a valuable example for the use of metal-organic framework-derived carbon composites as high-performance electrode materials of CDI and opens a new direction for promoting the application of CDI in surface-water.
水环境的保护和再生是当前人类社会可持续发展最关注的问题之一。为了解决水危机，利用电容去离子（CDI）技术从丰富的地表水提取适合人类饮用的淡水是一种可行的解决方案。在这项工作中，我们合成了一种具有独特准微立方形态的钴苯并咪唑框架（ZIF-9）衍生碳复合材料，并将所制备的材料用作 CDI 的电极材料。有趣的是，ZIF-9 衍生碳复合材料表现出令人印象深刻的脱盐能力为 55.4mg/g，并且可以重复使用。对地表水（京杭大运河、瘦西湖、初雨水、雨水）的测量表明，基于 ZIF-9 衍生碳复合材料的 CDI 技术不仅对金属离子具有很强的吸附作用，而且可以显著杀死微生物。结果表明，该技术对细菌（大肠杆菌和芽孢杆菌）和藻类的杀灭率分别达到 95%和 91.7%。这项工作为将金属有机骨架衍生碳复合材料用作 CDI 的高性能电极材料提供了一个有价值的范例，并为推动 CDI 在地表水的应用开辟了新的方向。
