Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Ozone Catcher

14.07.2011
When automobile traffic moves through the summer heat, ozone alerts lead to driving bans in some countries, such as Germany.

Ozone is formed when nitrogen oxide from exhausts is irradiated with UV light and releases an oxygen atom, which reacts with an oxygen molecule (O2) to form an ozone molecule (O3). A number of electrical devices, such as photocopiers and laser printers, also release this unhealthy gas.


In the journal Angewandte Chemie, a team led by Thomas Mathew and Kenichirou Suzuki at Toyota Central R&D Labs Inc. (Japan) report how they have now developed an iron oxide containing material that could lead to a new generation of ozone filters.

Ozone (O3) is a very dangerous air pollutant, irritating the airway and eyes as well as causing headaches. It also hinders plant growth and is believed to play a role in the die-off of forests. The typical “ozone smell” when using older photocopiers and laser printers is not the ozone itself: it is reaction products from the ozone. Most newer devices are equipped with filters that convert the ozone. Removal of O3 is essential for aircraft applications because O3 is an unavoidable pollutant at high altitude and can be introduced into the aircraft cabins during the flight.

Previous materials for the elimination of ozone have a number of disadvantages: for example, some require organic additives, others do not work without expensive metals, some are far from environmentally friendly, and most are not flexible enough for wide use in a variety of applications. The Japanese team has now reported a new, highly promising ozone trap: two-line ferrihydrite, a mineral composed of iron, oxygen, and water. The researchers produce it by a self-assembly process using various additives and solvents. The resulting highly porous material consists of tiny aggregated nanocrystals and its name is derived from the fact that when examined by X-ray diffraction, a technique for structure analysis, it shows two lines.

Why is two-line ferrihydrite such a good ozone catcher? Thanks to its pores and arrangement of nanoparticles, this material has a large and accessible inner surface. In comparison to other iron oxide materials, it has a particularly high proportion of unsaturated and thus reactive iron centers on its surface. These have fewer oxygen atoms as near neighbors than the iron atoms in the interior of the mineral. Such isolated iron oxide units absorb ozone especially well. Once bound to the iron, the ozone splits into an oxygen molecule (O2) and a highly reactive oxygen atom (O), which can react with a second lone oxygen atom to form O2.

This material could replace conventional ozone filters in electrostatic devices and aircraft applications. It can also be used for air-cleaner devices or as a filter in ventilation or air-conditioning ducts in offices and houses. In ozone processes for water cleaning and odor removal, e.g. smoke from vehicle interiors, it could catch the unreacted O3.

Author: Thomas Mathew, Toyota Central R&D Labs, Nagakute-Cho (Japan), mailto:thomasm74@gmail.com
Title: Mesoporous Ferrihydrite-Based Iron Oxide Nanoparticles as Highly Promising Materials for Ozone Removal

Angewandte Chemie International Edition 2011, 50, No. 32, Permalink to the article: http://dx.doi.org/10.1002/anie.201102007

Thomas Mathew | Angewandte Chemie
Further information:
http://pressroom.angewandte.org.
http://dx.doi.org/10.1002/anie.201102007

More articles from Life Sciences:

nachricht Building a brain, cell by cell: Researchers make a mini neuron network (of two)
23.05.2018 | Institute of Industrial Science, The University of Tokyo

nachricht Research reveals how order first appears in liquid crystals
23.05.2018 | Brown University

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Research reveals how order first appears in liquid crystals

23.05.2018 | Life Sciences

Space-like gravity weakens biochemical signals in muscle formation

23.05.2018 | Life Sciences

NIST puts the optical microscope under the microscope to achieve atomic accuracy

23.05.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>