An organic/inorganic hybrid mesoporous silica membrane: preparation and characterization |
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Authors: | Yong Chen Long Wu Jinyu Zhu Yi Shen Siwen Gan Anqi Chen |
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Affiliation: | (1) School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 200235 Shanghai, China |
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Abstract: | An organic/inorganic hybrid mesoporous silica membrane composed of mesoporous silica materials inside the channels of polycarbonate
filtration membrane (PC) was synthesized by using aspiration-induced infiltration method, and the surfactant in as-prepared
membrane was removed by employing template-extraction method. The obtained materials were characterized by scanning electron
microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD),transmission electron microscopy (TEM) and
N2 adsorption–desorption measurement. The SEM images and EDS elemental analyses show that as-synthesized materials in PC are
one-dimensional silica rods estimated as 200 nm in diameter and 9 μm in length. Moreover, the results of XRD, TEM and N2 adsorption–desorption analysis clearly demonstrate that such silica rods are mesoporous materials with two-dimensional hexagonal
mesostructure and the average mesopore diameter is about 3.0 nm. In addition, the porosity of organic/inorganic hybrid mesoporous
silica membrane was further examined by molecule permeation. It is found that small molecule, such as rhodamine B, can transport
across the membrane, but relatively large molecule, such as horse radish peroxidase, can not transport across the membrane,
indicating that it is size-selectivity of such a membrane for molecule permeation, which has the potential application in
the molecule filters to separate bio-macromolecule from small molecule. |
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