Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Small particles show big promise in beating unpleasant odors

Copper species coated silica nanoparticles (CuOXS) were synthesized for odor removal application. Coating with copper increased the capacity of silica nanoparticles for eliminating a model odor—ethyl mercaptan. Surface area, pore size distribution, and electron paramagnetic resonance spectroscopy analyses indicated that, at lower copper concentrations, copper species preferentially adsorb in 20 Å pores of silica. These copper species in a dispersed state are effective in catalytic removal of ethyl mercaptan. The best performance of copper-coated silica nanoparticles was achieved at a copper concentration of 3 wt %, at which all 20 Å nanopores were filled with isolated copper species. At higher copper loading, copper species are present as clusters on silica surfaces, which were found to be less effective in removing ethyl mercaptan. Gas chromatography experiments were carried out to verify catalytic conversion of ethyl mercaptan to diethyl disulfide by CuOXS particles. The present study suggests that the nature of the copper species and their site of adsorption, as well as state of dispersion, are important parameters to be considered for catalytic removal of sulfur-containing compounds. These parameters are critical for designing high-performance catalytic copper-coated silica nanoparticles for applications such as deodorization, removal of sulfur compounds from crude oil, hydrogenation, and antimicrobial activity. Credit Langmuir.
Copper species coated silica nanoparticles (CuOXS) were synthesized for odor removal application. Coating with copper increased the capacity of silica nanoparticles for eliminating a model odor—ethyl mercaptan. Surface area, pore size distribution, and electron paramagnetic resonance spectroscopy analyses indicated that, at lower copper concentrations, copper species preferentially adsorb in 20 Å pores of silica. These copper species in a dispersed state are effective in catalytic removal of ethyl mercaptan. The best performance of copper-coated silica nanoparticles was achieved at a copper concentration of 3 wt %, at which all 20 Å nanopores were filled with isolated copper species. At higher copper loading, copper species are present as clusters on silica surfaces, which were found to be less effective in removing ethyl mercaptan. Gas chromatography experiments were carried out to verify catalytic conversion of ethyl mercaptan to diethyl disulfide by CuOXS particles. The present study suggests that the nature of the copper species and their site of adsorption, as well as state of dispersion, are important parameters to be considered for catalytic removal of sulfur-containing compounds. These parameters are critical for designing high-performance catalytic copper-coated silica nanoparticles for applications such as deodorization, removal of sulfur compounds from crude oil, hydrogenation, and antimicrobial activity. Credit Langmuir.

Abstract:
Copper Coated Silica Nanoparticles for Odor Removal

Small particles show big promise in beating unpleasant odors

Washington, DC | Posted on December 25th, 2010

Scientists are reporting development of a new approach for dealing with offensive household and other odors — one that doesn't simply mask odors like today's room fresheners, but eliminates them at the source. Their research found that a deodorant made from nanoparticles — hundreds of times smaller than peach fuzz — eliminates odors up to twice as effectively as today's gold standard. A report on these next-generation odor-fighters appears in ACS' Langmuir, a bi-weekly journal.

Brij Moudgil and colleagues note that consumers use a wide range of materials to battle undesirable odors in clothing, on pets, in rooms, and elsewhere. Most common household air fresheners, for instance, mask odors with pleasing fragrances but do not eliminate the odors from the environment. People also apply deodorizing substances that absorb smells. These materials include activated carbon and baking soda. However, these substances tend to have only a weak ability to absorb the chemicals responsible for the odor.

The scientists describe development of a new material consisting of nanoparticles of silica (the main ingredient in beach sand) — each 1/50,000th the width of a human hair — coated with copper. That metal has well-established antibacterial and anti-odor properties, and the nanoparticles gave copper a greater surface area to exert its effects. Tests of the particles against ethyl mercaptan, the stuff that gives natural gas its unpleasant odor, showed that nanoparticles were up to twice as effective as the gold standard — activated carbon — at removing the material's foul-smelling odor. In addition to fighting odors, the particles also show promise for removing sulfur contaminants found in crude oil and for fighting harmful bacteria, they add.

Visit this link for a video:

www.dailymotion.com/video/xfk5tt_florida-nano-tech-team-declares-war-on-bad-odors_tech

####

For more information, please click here

Contacts:
Science Inquiries:
Michael Woods
Editor
202-872-6293

General Inquiries:
Michael Bernstein
202-872-6042

Copyright © American Chemical Society

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 News Press

News and information

Industrial Nanotech, Inc. Announces Next Large Order from the Oil and Gas Industry March 26th, 2015

Quantum compute this -- WSU mathematicians build code to take on toughest of cyber attacks: Revamped knapsack code offers online security for the future March 26th, 2015

Thousands of atoms entangled with a single photon: Result could make atomic clocks more accurate March 26th, 2015

Square ice filling for a graphene sandwich March 26th, 2015

Possible Futures

Nanotechnology in Medical Devices Market is expected to reach $8.5 Billion by 2019 March 25th, 2015

Nanotechnology Enabled Drug Delivery to Influence Future Diagnosis and Treatments of Diseases March 21st, 2015

Nanocomposites Market Growth, Industry Outlook To 2020 by Grand View Research, Inc. March 21st, 2015

Nanotechnology Drug Delivery Market in the US 2012-2016 : Latest Report Available by Radiant Insights, Inc March 16th, 2015

Academic/Education

LAMDAMAP 2015 hosted by the University March 26th, 2015

SUNY Poly & M+W Make Major Announcement: Major Expansion To Include M+W Owned Gehrlicher Solar America Corporation That Will Create up to 400 Jobs to Develop Solar Power Plants at SUNY Poly Sites Across New York State March 26th, 2015

SUNY POLY CNSE to Host First Ever Northeast Semi Supply Conference (NESCO) Conference Will Connect New and Emerging Innovators in the Northeastern US and Canada with Industry Leaders and Strategic Investors to Discuss Future Growth Opportunities in NYS March 25th, 2015

FEI Joins University of Ulm and CEOS on SALVE Project Research Collaboration: The Sub-Ångström Low Voltage Electron (SALVE) microscope should improve contrast and reduce damage on bio-molecules and two-dimensional nanomaterials, such as graphene March 18th, 2015

Announcements

Industrial Nanotech, Inc. Announces Next Large Order from the Oil and Gas Industry March 26th, 2015

Quantum compute this -- WSU mathematicians build code to take on toughest of cyber attacks: Revamped knapsack code offers online security for the future March 26th, 2015

Thousands of atoms entangled with a single photon: Result could make atomic clocks more accurate March 26th, 2015

Square ice filling for a graphene sandwich March 26th, 2015

Environment

Young NTU Singapore spin-off clinches S$4.3 million joint venture with Chinese commercial giant March 23rd, 2015

New processing technology converts packing peanuts to battery components March 22nd, 2015

EU Funded PCATDES Project has completed its half-period with success March 19th, 2015

Are current water treatment methods sufficient to remove harmful engineered nanoparticle? March 10th, 2015

Sports

Researchers use nanotechnology to engineer ACL replacements: Researchers created a tri-component, synthetic graft for reconstructing torn anterior cruciate ligaments December 30th, 2014

‘Small’ transformation yields big changes September 16th, 2014

CEA-Leti and CORIMA Team up on Force Sensors Integrated in Cycle Wheels to Measure Rider Power Output June 26th, 2014

‘Four!' Heads Up, Wide Use of More Flexible Metallic Glass Coming Your Way: Advances in Glass Alloys Lead to Strength, Flexibility March 4th, 2014

Textiles/Clothing

Scientists discover gecko secret March 16th, 2015

Energy-generating cloth could replace batteries in wearable devices March 4th, 2015

Australian startup creates world’s first 100% cotton hydrophobic T-Shirts February 3rd, 2015

Graphene displays clear prospects for flexible electronics February 2nd, 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