A fluorinated zirconium-based metal–organic framework as a platform for the capture and removal of perfluorinated pollutants from air and water†

IF 10.7 2区 材料科学 Q1 CHEMISTRY, PHYSICAL
Daniel Hedbom, Philipp Gaiser, Tyran Günther, Ocean Cheung, Maria Strømme, Michelle Åhlén and Martin Sjödin
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引用次数: 0

Abstract

A series of zirconium-based MOFs with acclaimed stability was prepared and their ability to adsorb polyfluorinated pollutants was compared. A novel fluorinated UiO-67 analogue, named UiO-67-F2, was synthesised alongside three previously reported materials, namely UiO-67-NH2, UiO-68-(CF3)2, and UiO-67. The structures were established and confirmed by powder X-ray diffraction. UiO-67-NH2, UiO-68(CF3)2 and UiO-67-F2 were examined as sorbents for the perfluorinated gas, sulphur hexafluoride (SF6) from the gaseous phase. The SF6 uptake of UiO-67-NH2 and UiO-67-F2 at 100 kPa, 20 °C, was high (5.54 and 5.24 mmol g−1, respectively). Furthermore, UiO-67-F2 exhibited a remarkable PFOA uptake of 928 mgPFOA per gMOF in an aqueous solution, which far exceeded that of unmodified UiO-67 (872 mgPFOA per gMOF at 1000 mgPFOA per LWater). This study has identified strengths and potential applications of the novel UiO-67-F2, as well as the impact of fluorine functionalization. It also offers some insight into the structure–property relations of UiO-based MOFs for their use as low-pressure SF6 storage materials and PFAS sorbents intended for water purification under ambient conditions.

Abstract Image

将氟化锆基金属有机框架作为捕获和去除空气和水中全氟污染物的平台
我们制备了一系列具有良好稳定性的锆基 MOFs,并比较了它们吸附多氟污染物的能力。除了之前报道过的三种材料外,还合成了一种新型氟化 UiO-67 类似物 UiO-67-F2:UiO-67-NH2、UiO-68-(CF3)2 和 UiO-67。粉末 X 射线衍射确定并确认了这些材料的结构。研究了 UiO-67-NH2、UiO-68(CF3)2 和 UiO-67-F2 作为吸附剂从气相中吸附全氟气体六氟化硫(SF6)的情况。在 100 kPa、293 K 条件下,UiO-67-NH2 和 UiO-67-F2 对 SF6 的吸收率很高(分别为 5.54 和 5.24 mmol g-1)。UiO-67-F2 在水溶液中的全氟辛酸(PFOA)吸收量高达 928 mgPFOA g -1MOF ,远远超过了未改性的 UiO-67(在 1 000 mgPFOA L -1Water PFOA 条件下为 872 mgPFOA g -1MOF )。这项研究确定了新型 UiO-67-F2 的优势和潜在应用,以及氟功能化的影响。研究还深入探讨了基于 UiO 的 MOFs 的结构-性能关系,以便将其用作低压 SF6 储存材料和用于环境条件下水净化的 PFAS 吸附剂。
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来源期刊
Journal of Materials Chemistry A
Journal of Materials Chemistry A CHEMISTRY, PHYSICAL-ENERGY & FUELS
CiteScore
19.50
自引率
5.00%
发文量
1892
审稿时长
1.5 months
期刊介绍: The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.
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