High‐Performance Ceramic Membranes with a Separation Layer of Metal Oxide Nanofibers

In conventional fabrication of ceramic separation membranes, the particulate sols are applied onto porous supports. Major structural deficiencies under this approach are pin-holes and cracks, and the dramatic losses of flux when pore sizes are reduced to enhance selectivity. We have overcome these structural deficiencies by constructing hierarchically structured separation layer on a porous substrate using lager titanate nanofibers and smaller boehmite nanofibers. This yields a radical change in membrane texture. The resulting membranes effectively filter out species larger than 60 nm at flow rates orders of magnitude greater than conventional membranes. This reveals a new direction in membrane fabrication.

[1]  S. Xie,et al.  Probing the Structure of the Sars Coronavirus Using Scanning Electron Microscopy , 2003, Antiviral therapy.

[2]  Huaiyong Zhu,et al.  Preparation and Electrochemical Performance of Polycrystalline and Single Crystalline CuO Nanorods as Anode Materials for Li Ion Battery , 2004 .

[3]  Xueping Gao,et al.  Hydrogen titanate nanofibers covered with anatase nanocrystals: a delicate structure achieved by the wet chemistry reaction of the titanate nanofibers. , 2004, Journal of the American Chemical Society.

[4]  R. Bhave,et al.  Inorganic membranes : synthesis, characteristics, and applications , 1991 .

[5]  T. Noda,et al.  Architecture of ribonucleoprotein complexes in influenza A virus particles , 2006, Nature.

[6]  W. Ingler,et al.  Efficient Photochemical Water Splitting by a Chemically Modified n-TiO2 , 2002, Science.

[7]  Thomas P. Russell,et al.  Nanoporous Membranes with Ultrahigh Selectivity and Flux for the Filtration of Viruses , 2006 .

[8]  T. Leiknes,et al.  The effect of coagulation with MF/UF membrane filtration for the removal of virus in drinking water , 2006 .

[9]  R. Webster,et al.  Are We Ready for Pandemic Influenza? , 2003, Science.

[10]  Andrea I. Schäfer,et al.  Nanofiltration: Principles and Applications , 2004 .

[11]  E YoldasB,et al.  透明な多孔質アルミナ | 文献情報 | J-GLOBAL 科学技術総合リンクセンター , 1975 .

[12]  John M. Layman,et al.  Phospholipid Nonwoven Electrospun Membranes , 2006, Science.

[13]  W. Shan,et al.  Chiral mesostructured silica nanofibers of MCM-41. , 2006, Angewandte Chemie.

[14]  Y. Lan,et al.  Phase transition between nanostructures of titanate and titanium dioxides via simple wet-chemical reactions. , 2005, Journal of the American Chemical Society.

[15]  F. Wu,et al.  CeO2 nanorods and gold nanocrystals supported on CeO2 nanorods as catalyst. , 2005, The journal of physical chemistry. B.

[16]  R. Baker.  Membrane Technology and Applications , 1999 .

[17]  J. Yates,et al.  Photocatalysis on TiO2 Surfaces: Principles, Mechanisms, and Selected Results , 1995 .

[18]  Huaiyong Zhu,et al.  γ-Alumina Nanofibers Prepared from Aluminum Hydrate with Poly(ethylene oxide) Surfactant , 2002 .

[19]  H. Verweij,et al.  High-selectivity, high-flux silica membranes for gas separation , 1998, Science.

[20]  Huaiyong Zhu,et al.  Growth of Boehmite Nanofibers by Assembling Nanoparticles with Surfactant Micelles , 2004 .

[21]  Christian Guizard,et al.  Inorganic membranes and solid state sciences , 2000 .

[22]  Yiying Wu,et al.  Single-crystal mesoporous silica ribbons. , 2004, Angewandte Chemie.

[23]  A. MacDiarmid,et al.  "Synthetic Metals": A Novel Role for Organic Polymers (Nobel Lecture). , 2001, Angewandte Chemie.

[24]  C. Guizard,et al.  Design of nanosized structures in sol-gel derived porous solids. Applications in catalyst and inorganic membrane preparation , 1999 .

[25]  George G. Chase,et al.  Continuous Electrospinning of Aligned Polymer Nanofibers onto a Wire Drum Collector , 2004 .

[26]  D. Shah,et al.  Filtration of Nanoparticles with Dimethyldioctadecylammonium Bromide Treated Microporous Polypropylene Filters , 1997 .

[27]  T. Leiknes,et al.  Removal of natural organic matter (NOM) in drinking water treatment by coagulation–microfiltration using metal membranes , 2004 .

[28]  Fred Tepper,et al.  Novel nanofibre filter medium attracts waterborne pathogens , 2002 .

[29]  J. A. Comer,et al.  A novel coronavirus associated with severe acute respiratory syndrome. , 2003, The New England journal of medicine.

[30]  Francesco Stellacci,et al.  Size Fractionation of Metal Nanoparticles by Membrane Filtration , 2005 .

[31]  Liwei Lin,et al.  Near-field electrospinning. , 2006, Nano letters.

[32]  Jianfang Wang,et al.  Structure-selective synthesis of mesostructured/mesoporous silica nanofibers. , 2003, Journal of the American Chemical Society.

[33]  Klaus-Viktor Peinemann,et al.  Dense hydrophilic composite membranes for ultrafiltration , 1995 .

[34]  Henk Verweij,et al.  Ceramic membranes: Morphology and transport , 2003 .

[35]  Y. S. Lin,et al.  A comparative study on thermal and hydrothermal stability of alumina, titania and zirconia membranes , 1994 .