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基于含磁铁矿二氧化硅多孔玻璃的新型无机超滤膜：结构与吸附性能

Novel Inorganic Membranes Based on Magnetite-Containing Silica Porous Glasses for Ultrafiltration: Structure and Sorption Properties.

作者信息

Konon Marina, Brazovskaya Elena Yu, Kreisberg Valery, Semenova Ekaterina, Polyakova Irina G, Osipov Armenak, Antropova Tatiana

机构信息

Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, 199034 St. Petersburg, Russia.

Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia.

出版信息

Membranes (Basel). 2023 Mar 15;13(3):341. doi: 10.3390/membranes13030341.

DOI:10.3390/membranes13030341
PMID:36984728
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10057932/
Abstract

Porous glasses (PGs) obtained from sodium borosilicate (NBS) phase-separated glasses via leaching are promising inorganic membranes. Introducing FeO into NBS glasses imparts ferrimagnetic properties due to magnetite crystallization. Leaching of such glasses leads to the formation of magnetic PGs with interesting electro-surface characteristics. This work aimed to investigate the process of obtaining magnetite-containing PGs from NBS glasses depending on silica content, using XRPD and Raman spectroscopy, studying the PG membranes' structural characteristics and their sorption properties with respect to methylene blue (MB). Obtained PGs were characterized by a polymodal distribution of mesopores and a small number of micropores with specific surface area values of 32-135 m/g and an average mesopore diameter of 5-41 nm. The kinetic data were analyzed using pseudo-first-order, pseudo-second-order, and intra-particle diffusion equations. The equilibrium isotherms were fitted with Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich models. MB adsorption was found to be a complex process. The glass with the highest specific surface area demonstrated the maximum sorption capacity (10.5 mg/g). The pore size of PGs allowed them to be considered potential novel magnetic membranes for ultrafiltration.

摘要

通过浸出从硼硅酸钠（NBS）相分离玻璃中获得的多孔玻璃（PGs）是很有前途的无机膜。由于磁铁矿结晶，将FeO引入NBS玻璃中可赋予亚铁磁性。此类玻璃的浸出导致形成具有有趣电表面特性的磁性PGs。本工作旨在利用XRPD和拉曼光谱研究根据二氧化硅含量从NBS玻璃中获得含磁铁矿PGs的过程，研究PG膜的结构特征及其对亚甲基蓝（MB）的吸附性能。所获得的PGs具有多峰分布的中孔和少量微孔，比表面积值为32 - 135 m/g，平均中孔直径为5 - 41 nm。使用伪一级、伪二级和颗粒内扩散方程分析动力学数据。用朗缪尔、弗伦德利希、坦金和杜宾宁 - 拉杜舍维奇模型拟合平衡等温线。发现MB吸附是一个复杂的过程。比表面积最高的玻璃表现出最大吸附容量（10.5 mg/g）。PGs的孔径使其可被视为用于超滤的潜在新型磁性膜。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/0b4645a53df5/membranes-13-00341-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/f19e872b6458/membranes-13-00341-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/b5d7675104a4/membranes-13-00341-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/e3f176b209e1/membranes-13-00341-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/91852ab655d5/membranes-13-00341-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/6c5e3d924072/membranes-13-00341-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/913894a9bf70/membranes-13-00341-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/0b4645a53df5/membranes-13-00341-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/f19e872b6458/membranes-13-00341-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/e924d3d55fa0/membranes-13-00341-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/89f1229df9ae/membranes-13-00341-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/6407d71bb63a/membranes-13-00341-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/b5d7675104a4/membranes-13-00341-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/e3f176b209e1/membranes-13-00341-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/91852ab655d5/membranes-13-00341-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/6c5e3d924072/membranes-13-00341-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/913894a9bf70/membranes-13-00341-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a09e/10057932/0b4645a53df5/membranes-13-00341-g010.jpg

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