Cai Jingyu, Shi Junjie, Zhang Jian, Miao Xiaoyu, Wang Sen, Xiao Longqiang, Liu Dan, Hou Linxi
Department of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China.
Qingyuan Innovation Laboratory, Quanzhou 362801, China.
Inorg Chem. 2024 Sep 16;63(37):17225-17237. doi: 10.1021/acs.inorgchem.4c03034. Epub 2024 Sep 4.
Electronic-grade isopropyl alcohol is widely utilized in the cleaning of semiconductors and microelectronic components. Removing ions like Pb is crucial since the presence of impurities may cause degradation of electronics, increased failure rates, and short circuits. Membrane materials offer a number of advantages in the field of adsorption separation; however, the lack of adsorption sites results in limited adsorption capacity. In the current work, guanidino-grafted NH-MIL-101(Fe) was incorporated into polyvinylidene fluoride (PVDF) to prepare MOF/PVDF mixed matrix membranes (NM/PVDF) for the removal of Pb from isopropanol. Benefiting from the larger specific surface area and more lone electron pairs in the guanidine group, the Pb adsorption capacity of the as-prepared NM/PVDF membrane was 29.4458 mg/g, which was higher than that of the NH-MIL-101(Fe)/PVDF membrane (20.9306 mg/g) and the pure PVDF membrane (6.7324 mg/g). The NM/PVDF membrane was able to reduce the concentration of Pb from 500 to 86.73 ppb. This work highlights the potential of guanidine-grafted Fe-based MOFs/PVDF membranes as adsorbents for acquisition of electronic-grade solvents.
电子级异丙醇广泛用于半导体和微电子元件的清洗。去除铅等离子至关重要，因为杂质的存在可能导致电子器件性能下降、故障率增加和短路。膜材料在吸附分离领域具有诸多优势；然而，缺乏吸附位点导致吸附容量有限。在当前工作中，将胍基接枝的NH-MIL-101(Fe)引入聚偏氟乙烯（PVDF）中，制备用于从异丙醇中去除铅的MOF/PVDF混合基质膜（NM/PVDF）。得益于胍基中更大的比表面积和更多的孤对电子，所制备的NM/PVDF膜对铅的吸附容量为29.4458 mg/g，高于NH-MIL-101(Fe)/PVDF膜（20.9306 mg/g）和纯PVDF膜（6.7324 mg/g）。NM/PVDF膜能够将铅的浓度从500 ppb降低至86.73 ppb。这项工作突出了胍基接枝的铁基金属有机框架/PVDF膜作为获取电子级溶剂吸附剂的潜力。
