Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Nano water filter: sieve holds nanoparticles in place

Abstract:
A membrane consisting of polymer fibres and proteins would make a novel filter for tiny, nano-scaled particles in aqueous solutions. The result of such research, done by Professor Mady Elbahri and his team from the Institute of Material Science at Kiel University and the Institute of Polymer Research at Helmholtz-Zentrum Geesthacht, has recently been published as the cover article in the issue 22 of Advanced Functional Materials.

Nano water filter: sieve holds nanoparticles in place

Germany | Posted on November 29th, 2012

A nanofluid, a colloidal suspension of, for example, metal nanoparticles in water, passes easily through commonly used macroporous polymeric membranes. The particles are too small to be held using hole diameters between three and four micrometers. In addition, the particles would block smaller sieve openings rapidly. Hence, pressure would be necessary to filter out the fluid.

In order to solve these problems, Elbahri and his team biofunctionalized their membrane and added a commercially available protein to the fibres. "We found out that the protein undergoes a conformational change under water, and its ability to capture all the metal nanoparticles during the filtration process is activated", explains Elbahri. "This is a breakthrough", adds co-author Dr. Shahin Homaeigohar. "The same principle will hopefully enable us to filter bio-molecules and organisms out of waste water."

From filtration to solar thermal energy

When the nano sieve captures metal particles such as gold, another application is at hand, as no other method has succeeded in dispersing the particles so well. "This result was unexpected", says Elbahri. "Under dry conditions, the membrane shows the color of the metal, in this case the red of the gold nanoparticles". When the membrane gets wet, it becomes black. "Then it acts as an omnidirectional perfect black absorber, which can be used as a solar absorber." Elbahri adds: "Indeed we bridge the gaps between several disciplines - chemistry, physics, bioscience and materials science that is - and the Nanochemistry and Nanoengineering group has now initiated the first step toward intradisciplinarity of nanoscience."

Application as a virus and bio-filter

The nano sieve will allow filtering of very small particles or biomolecules and organisms such as viruses out of water. The scientists involved have already patented their innovation, a bio-nano-composite, in Europe. Another patent for the USA is on its way. Besides its application in water filtration, the nano sieve shows great potentials as solar absorber and as a catalyser. "All in all, the result is a breakthrough towards the design of an operative filtration process, as a new route for the fabrication of functional materials, and offers commercially attractive efficiencies at a low cost", says Elbahri.

####

For more information, please click here

Copyright © Wiley-VCH Materials Science Journals

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Link to the original paper on Wiley Online Library:

Related News Press

News and information

Why Is Google Making Synthetic Arms? February 1st, 2015

Nanomaterials Used to Reduce Heat Generated by LED Panels February 1st, 2015

Leader Describes Iran's Independence as Root Cause of Bullying Powers' Enmity February 1st, 2015

Performance Drop in Solar Cells Prevented by Nanotechnology February 1st, 2015

Discoveries

Nanomaterials Used to Reduce Heat Generated by LED Panels February 1st, 2015

Performance Drop in Solar Cells Prevented by Nanotechnology February 1st, 2015

Pinholes are Pitfalls for High Performance Solar Cells February 1st, 2015

New method allows for greater variation in band gap tunability: The method can change a material's electronic band gap by up to 200 percent January 31st, 2015

Materials/Metamaterials

Evidence mounts for quantum criticality theory: Findings bolster theory that quantum fluctuations drive strange electronic phenomena January 30th, 2015

Crystal light: New light-converting materials point to cheaper, more efficient solar power: University of Toronto engineers study first single crystal perovskites for new solar cell and LED applications January 30th, 2015

The Original Frameless Shower Doors Installs DFI's FuseCube™ to Offer Hydrophobic Protective Coating as a Standard Feature: First DFI FuseCube™ Installed on the East Coast to Enable Key Differentiator for the Original Frameless Shower Doors January 29th, 2015

Creating new materials with quantum effects for electronics January 29th, 2015

Announcements

Why Is Google Making Synthetic Arms? February 1st, 2015

Nanomaterials Used to Reduce Heat Generated by LED Panels February 1st, 2015

Leader Describes Iran's Independence as Root Cause of Bullying Powers' Enmity February 1st, 2015

Performance Drop in Solar Cells Prevented by Nanotechnology February 1st, 2015

Water

Nanoparticles for clean drinking water January 17th, 2015

Going with the flow January 16th, 2015

Rice's Naomi Halas to direct Smalley Institute: Optics pioneer will lead Rice's multidisciplinary science institute January 15th, 2015

Liquids and glasses relax, too. But not like you thought January 15th, 2015

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE