4.6 Article

Oriented Free-Standing Ammonium Vanadium Oxide Nanobelt Membranes: Highly Selective Absorbent Materials

Journal

CHEMISTRY-A EUROPEAN JOURNAL
Volume 16, Issue 48, Pages 14307-14312

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201002228

Keywords

absorption; hydrophobic effect; membranes; nanostructures; vanadium

Funding

  1. National Natural Science Foundation of China [50872020, 50902021]
  2. University in China
  3. Shanghai Education Commission [09P51400500, 085G32]
  4. Science and Technology Commission of Shanghai [10JC1400100]
  5. Shanghai Municipal Education Commission [09CG27]
  6. Shanghai Education Development Foundation
  7. Shanghai Leading Academic Discipline Project [B603]
  8. Program of Introducing Talents of Discipline to Universities [111-2-04]

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Highly selective, absorbent, free-standing, paper-like membranes made of ammonium vanadium oxide (NH4V4O14) nanobelts have been engineered by taking advantage of the nanoscaled self-assembly of architectures that display a mesh structure with an average periodic pore size of about 5 to 10 nm. The NH4V4O14 nanobelts are synthesized by using a simple hydrothermal process, and exhibit the same orientation and assemble into bundles, each about 40 to 80 nm in width, 3 to 5 nm in thickness, and up to several millimeters in length. Importantly, the as-obtained NH4V4O14 nanobelt membranes can highly selectively absorb a variety of organic solvents, covering both polar and non-polar solvents, for example, the absorbent capacity of glycol is 28 times as high as the initial weight of the membrane, and it can even separate organic solvents with similar polarities and absorb solid contaminants in organic solvents. These highly selective, absorbent membrane materials can be an ideal candidate for the separation and removal of pollution in industrial and environmental applications.

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