Si Guang-Rui, Kong Xiang-Jing, He Tao, Zhang Zhengqing, Li Jian-Rong
Beijing Key Laboratory for Green Catalysis and Separation and Department of Chemical Engineering, College of Materials Science & Engineering, Beijing University of Technology, 100124, Beijing, China.
Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA.
Nat Commun. 2024 Aug 22;15(1):7220. doi: 10.1038/s41467-024-51522-3.
Benzene and SO, coexisting as hazardous air pollutants in some cases, such as in coke oven emissions, have led to detrimental health and environmental effects. Physisorbents offer promise in capturing benzene and SO, while their performance compromises at low concentration. Particularly, the simultaneous capture of trace benzene and SO under humid conditions is attractive but challenging. Here, we address this issue by constructing a robust pyrazolate metal-organic framework (MOF) sorbent featuring rich accessible Ni(II) sites with low affinity to water and good stability. This material achieves a high benzene uptake of 5.08 mmol g at 10 Pa, surpassing previous benchmarks. More importantly, it exhibits an adsorption capacity of ~0.51 mmol g for 10 ppm benzene and ~1.21 mmol g for 250 ppm SO under 30% relative humidity. This work demonstrates that a pioneering MOF enables simultaneous capture of trace benzene and SO, highlighting the potential of physisorbents for industrial effluent remediation, even in the presence of moisture.
苯和二氧化硫在某些情况下，如在焦炉排放物中，作为有害空气污染物共存，已对健康和环境造成了有害影响。物理吸附剂在捕获苯和二氧化硫方面具有潜力，但其在低浓度下性能会下降。特别是，在潮湿条件下同时捕获痕量苯和二氧化硫很有吸引力但具有挑战性。在此，我们通过构建一种坚固的吡唑盐基金属有机框架（MOF）吸附剂来解决这个问题，该吸附剂具有丰富的可及镍（II）位点，对水亲和力低且稳定性好。这种材料在10 Pa下实现了5.08 mmol g的高苯吸附量，超过了先前的基准。更重要的是，在30%相对湿度下，它对10 ppm苯的吸附容量约为0.51 mmol g，对250 ppm二氧化硫的吸附容量约为1.21 mmol g。这项工作表明，一种开创性的MOF能够同时捕获痕量苯和二氧化硫，突出了物理吸附剂在工业废水修复中的潜力，即使在存在水分的情况下也是如此。
