Nanotechnology Now





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Carbon nanotube sponge shows improved water clean-up

Abstract:
A carbon nanotube sponge capable of soaking up water contaminants, such as fertilisers, pesticides and pharmaceuticals, more than three times more efficiently than previous efforts has been presented in a new study published today.

Carbon nanotube sponge shows improved water clean-up

London, UK | Posted on January 16th, 2014

The carbon nanotube (CNT) sponges, uniquely doped with sulphur, also demonstrated a high capacity to absorb oil, potentially opening up the possibility of using the material in industrial accidents and oil spill clean-ups.

The results have been published today, 17 January, in IOP Publishing's journal Nanotechnology.

CNTs are hollow cylindrical structures composed of a single sheet of carbon. Owing to their structure, CNTs have extraordinary thermal, chemical and mechanical properties that have led to an array of applications from body armour to solar panels.

They have been touted as excellent candidates for wastewater clean-up; however, problems have arisen when trying to handle the fine powders and eventually retrieve them from the water.

Lead author of the research Luca Camilli, from the University of Roma, said: "It is quite tricky using CNT powders to remove oil spilled in the ocean. They are hard to handle and can eventually get lost or dispersed in the ocean after they are released.

"However, millimetre- or centimetre-scale CNTs, as we've synthesised in this study, are much easier to handle. They float on water because of their porous structure and, once saturated with oil, can be easily removed. By simply squeezing them and releasing the oil, they can then be re-used."

In the new study, the researchers, from the University of Roma, University of Nantes and University of L'Aquila, bulked up the CNTs to the necessary size by adding sulphur during the production process--the resulting sponge had an average length of 20 mm.

The addition of sulphur caused defects to form on the surface of the CNT sponges which then enabled ferrocene, which was also added during the production process, to deposit iron into tiny capsules within the carbon shells.

The presence of iron meant the sponges could be magnetically controlled and driven without any direct contact, easing the existing problem of trying to control CNTs when added onto the water's surface.

The researchers demonstrated how the constructed CNT sponges could successfully remove a toxic organic solvent--dichlorobenzene--from water, showing that it could absorb a mass that was 3.5 times higher than previously achieved.

The CNT sponges were also shown to absorb vegetable oil up to 150 times of its initial weight and absorb engine oil to a slightly higher capacity than previous reported.

"The improved absorption properties of the sponge are down to the porous structure and the rough surface of the CNTs. Oils or solvent can easily be absorbed in the empty spaces amongst the CNTs, which is made easier by the rough surfaces," continued Camilli.

"The next stage of our research is to improve the synthesis process so that the sponges can be produced on a commercial scale. We must also study the toxicity of the sponges before any real-world applications can be realised."

####

About Institute of Physics
The Institute of Physics is a leading scientific society. We are a charitable organisation with a worldwide membership of more than 50,000, working together to advance physics education, research and application. We engage with policymakers and the general public to develop awareness and understanding of the value of physics and, through IOP Publishing, we are world leaders in professional scientific communications. Go to http://www.iop.org

About IOP Publishing

IOP Publishing provides a range of journals, conference proceedings, magazines, websites, books and other services that enable researchers and research organisations to achieve the biggest impact for their work.

We combine the culture of a global learned society with highly efficient and effective publishing systems and processes. We serve researchers in the physical and related sciences in all parts of the world through our offices in the UK, US, Germany, China and Japan, and staff in many other locations including Mexico and Russia.

IOP Publishing is a wholly owned subsidiary of the Institute of Physics. The Institute is a leading international scientific society with over 55 thousand members promoting physics and bringing physicists together for the benefit of all.

Surplus generated by IOP Publishing is gift aided to the Institute to support science and scientists in both the developed and developing world.

For more information, please click here

Contacts:
Michael Bishop

01-179-301-032

Copyright © Institute of Physics

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

From 17 January, this paper can be downloaded from:

Related News Press

News and information

Who needs water to assemble DNA? Non-aqueous solvent supports DNA nanotechnology May 27th, 2015

Controlled Release of Anticorrosive Materials in Spot by Nanocarriers May 27th, 2015

Production of Copper Cobaltite Nanocomposites with Photocatalytic Properties in Iran May 27th, 2015

Dr.Theivasanthi Slashes the Price of Graphene Heavily: World first & lowest price Nano-price (30 USD / kg) of graphene by nanotechnologist May 26th, 2015

Nanotubes/Buckyballs/Fullerenes

Basel physicists develop efficient method of signal transmission from nanocomponents May 23rd, 2015

Researchers develop new way to manufacture nanofibers May 21st, 2015

Sandia researchers first to measure thermoelectric behavior by 'Tinkertoy' materials May 20th, 2015

Cotton fibres instead of carbon nanotubes May 9th, 2015

Discoveries

Who needs water to assemble DNA? Non-aqueous solvent supports DNA nanotechnology May 27th, 2015

Production of Copper Cobaltite Nanocomposites with Photocatalytic Properties in Iran May 27th, 2015

Fine-tuned molecular orientation is key to more efficient solar cells May 26th, 2015

DNA Double Helix Does Double Duty in Assembling Arrays of Nanoparticles: Synthetic pieces of biological molecule form framework and glue for making nanoparticle clusters and arrays May 25th, 2015

Announcements

Who needs water to assemble DNA? Non-aqueous solvent supports DNA nanotechnology May 27th, 2015

Controlled Release of Anticorrosive Materials in Spot by Nanocarriers May 27th, 2015

Production of Copper Cobaltite Nanocomposites with Photocatalytic Properties in Iran May 27th, 2015

Dr.Theivasanthi Slashes the Price of Graphene Heavily: World first & lowest price Nano-price (30 USD / kg) of graphene by nanotechnologist May 26th, 2015

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Who needs water to assemble DNA? Non-aqueous solvent supports DNA nanotechnology May 27th, 2015

Controlled Release of Anticorrosive Materials in Spot by Nanocarriers May 27th, 2015

Production of Copper Cobaltite Nanocomposites with Photocatalytic Properties in Iran May 27th, 2015

Global Nano-Enabled Packaging Market For Food and Beverages Will Reach $15.0 billion in 2020 May 26th, 2015

Food/Agriculture/Supplements

Global Nano-Enabled Packaging Market For Food and Beverages Will Reach $15.0 billion in 2020 May 26th, 2015

Supercomputer unlocks secrets of plant cells to pave the way for more resilient crops: IBM partners with University of Melbourne and UQ May 21st, 2015

QuantumSphere Announces Production-Scale Validation of Nano Iron Catalysts for Multi-Billion Dollar Ammonia Industry: Significant Improvement in Ammonia Production for Agricultural Fertilizer, Global Food Crops May 7th, 2015

Nanoparticles in consumer products can significantly alter normal gut microbiome May 4th, 2015

Environment

Conversion of Greenhouse Gases to Syngas in Presence of Nanocatalysts in Iran May 22nd, 2015

Directa Plus in Barcelona to present the innovative project GEnIuS for oil spills clean-up activities: The company has created a graphene-based product for the remediation of water contaminated by oil and hydrocarbons May 21st, 2015

Nano-policing pollution May 13th, 2015

Chemists strike nano-gold: 4 new atomic structures for gold nanoparticle clusters: Research builds upon work by Nobel Prize-winning team from Stanford University April 28th, 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