Preparation and characterization of novel Ce-doped nonstoichiometric nanosilica/polysulfone composite membranes

Zhang, Yuqing, Shan, Libo, Tu, Zhengyu and Zhang, Yahui (2008) Preparation and characterization of novel Ce-doped nonstoichiometric nanosilica/polysulfone composite membranes. Separation and Purification Technology, 63 1: 207-212. doi:10.1016/j.seppur.2008.05.015

Author Zhang, Yuqing
Shan, Libo
Tu, Zhengyu
Zhang, Yahui
Title Preparation and characterization of novel Ce-doped nonstoichiometric nanosilica/polysulfone composite membranes
Journal name Separation and Purification Technology   Check publisher's open access policy
ISSN 1383-5866
Publication date 2008-10-01
Sub-type Article (original research)
DOI 10.1016/j.seppur.2008.05.015
Volume 63
Issue 1
Start page 207
End page 212
Total pages 6
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Language eng
Abstract Polysulfone (PSF) is a kind of membrane material with better performance and broadly applied in water purification, biochemistry separation, Chinese traditional herb drugs extraction and concentration, etc. But PSF membrane has a tendency to be contaminated for its hydrophobicity, which can result in declining of flux and life of the membrane. To enhance the capability of PSF membrane, such as tensile strength, hydrophilic property, anti-fouling ability, novel organic–inorganic composite membranes were prepared by a process of adding modified nanosilica with higher activity and hydrophilic property to the porous matrix of PSF. Ce-doped nonstoichiometric nanosilica (modified nanosilica) was synthesized by doping the rare earth Ce element. Composite membranes were prepared by sol–gel process and characterized by test of tensile strength, contact angel, porosity, infrared spectroscope (IR), environment scanning electron microscope (ESEM) and performance for oil–water separation. The results show that tensile strength is improved to a large extent and contact angel reduces from 78.6° to 41.7°; porosity reaches 75%. IR spectrum of the composite membrane indicates that the cerium element has entered into the framework of nanosilica. ESEM micrographs indicate that the composite membrane owning the asymmetry structure has two layers of compact layer and porous layer and that modified nanosilica is uniformly dispersed in PSF. The flux in treatment of wastewater containing oil is greatly increased, so it indicates that the anti-fouling ability is significantly enhanced and treatment of wastewater containing oil using the composite membrane developed is feasible and desirable.
Keyword composite membranes
Ce-doped nonstoichiometric nanosilica
Wastewater containing oil
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Engineering Publications
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Citation counts: TR Web of Science Citation Count  Cited 42 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 03 Sep 2009, 09:24:27 EST by Mr Andrew Martlew on behalf of Functional Nanomaterials