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磁性Fe-SBA-15介孔二氧化硅分子筛的制备、表征及应用

Preparation, Characterization, and Application of Magnetic Fe-SBA-15 Mesoporous Silica Molecular Sieves.

作者信息

Huang Huayu, Ji Yongsheng, Qiao Zhenfeng, Zhao Chuande, He Jianguo, Zhang Haixia

机构信息

Department of Chemistry, Lanzhou University, Lanzhou 730000, China.

出版信息

J Autom Methods Manag Chem. 2010;2010:323509. doi: 10.1155/2010/323509. Epub 2010 Dec 5.

DOI:10.1155/2010/323509
PMID:21151665
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC2997508/
Abstract

Magnetic Fe-SBA-15 mesoporous silica molecular sieves were prepared, characterized, and used for magnetic separation. Wet impregnation, drying, and calcination steps led to iron inclusion within the mesopores. Iron oxide was reduced to the metal form with hydrogen, and the magnetic Fe-SBA-15 was obtained. Fourier-transform infrared spectroscopy confirmed the preparation process from the oxide to metal forms. The structure of magnetic materials was confirmed by Mössbauer spectra. Powder X-ray diffraction data indicated that the structure of Fe-SBA-15 retained the host SBA-15 structure. Brunauer-Emmett-Teller analysis revealed a decrease in surface area and pore size, indicating Fe-SBA-15 coating on the inner surfaces. Scanning electron micrographs confirmed the decrease in size for modified SBA-15 particles. From scanning electron micrographs, it was found that the size of the modified SBA-15 particles decreased. Transmission electron micrographs also confirmed that modified SBA-15 retained the structure of the parent SBA-15 silica. Fe-SBA-15 exhibited strong magnetic properties, with a magnetization value of 8.8 emu g(-1). The iron content in Fe-SBA-15 was determined by atom adsorption spectroscopy. Fe-SBA-15 was successfully used for the magnetic separation of three aromatic compounds in water. Our results suggest wide applicability of Fe-SBA-15 magnetic materials for the rapid and efficient separation of various compounds.

摘要

制备了磁性Fe-SBA-15介孔二氧化硅分子筛，对其进行了表征，并将其用于磁分离。通过湿浸渍、干燥和煅烧步骤，使铁进入介孔中。用氢气将氧化铁还原为金属形式，从而获得磁性Fe-SBA-15。傅里叶变换红外光谱证实了从氧化物形式到金属形式的制备过程。穆斯堡尔光谱证实了磁性材料的结构。粉末X射线衍射数据表明，Fe-SBA-15的结构保留了主体SBA-15的结构。布鲁诺尔-埃米特-特勒分析表明表面积和孔径减小，表明内表面有Fe-SBA-15涂层。扫描电子显微镜照片证实了改性SBA-15颗粒尺寸减小。从扫描电子显微镜照片中发现，改性SBA-15颗粒的尺寸减小。透射电子显微镜照片也证实了改性SBA-15保留了母体SBA-15二氧化硅的结构。Fe-SBA-15表现出强磁性，磁化值为8.8 emu g(-1)。通过原子吸收光谱法测定了Fe-SBA-15中的铁含量。Fe-SBA-15成功用于水中三种芳香族化合物的磁分离。我们的结果表明，Fe-SBA-15磁性材料在快速高效分离各种化合物方面具有广泛的适用性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/9da3264752ba/JAMMC2010-323509.009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/b662bbda6d0f/JAMMC2010-323509.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/2dbc16969525/JAMMC2010-323509.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/3815cbe09800/JAMMC2010-323509.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/36bc1b9dd1d1/JAMMC2010-323509.004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/12cb4fae2347/JAMMC2010-323509.005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/114faff72465/JAMMC2010-323509.006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/0c112ae5243c/JAMMC2010-323509.007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/1fa899f21024/JAMMC2010-323509.008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/9da3264752ba/JAMMC2010-323509.009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/b662bbda6d0f/JAMMC2010-323509.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/2dbc16969525/JAMMC2010-323509.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/3815cbe09800/JAMMC2010-323509.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/36bc1b9dd1d1/JAMMC2010-323509.004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/12cb4fae2347/JAMMC2010-323509.005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/114faff72465/JAMMC2010-323509.006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/0c112ae5243c/JAMMC2010-323509.007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/1fa899f21024/JAMMC2010-323509.008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e92/2997508/9da3264752ba/JAMMC2010-323509.009.jpg

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