Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Silver nanoparticle on graphene oxide support: An efficient catalyst for organic transformations

Figure 1: (Left) Transmission electron microscopy image of Ag-rGO nanohybrids. The inset shows the catalytic conversion of 4-nitrophenol to 4-aminophenol. Figure 2 (Right) Absorption spectra of 4-nitrophenol decreases in intensity and its color fades (inset) due to catalytic conversion.
Figure 1: (Left) Transmission electron microscopy image of Ag-rGO nanohybrids. The inset shows the catalytic conversion of 4-nitrophenol to 4-aminophenol. Figure 2 (Right) Absorption spectra of 4-nitrophenol decreases in intensity and its color fades (inset) due to catalytic conversion.

Abstract:
Silver (Ag) has a high catalytic activity towards many organic and inorganic transformations such as NOx reduction and catalytic oxidation of CO to CO2. In practical applications, catalysts like Ag are affixed to a substrate, usually a solid with a high surface area such as alumina or carbon.

Silver nanoparticle on graphene oxide support: An efficient catalyst for organic transformations

Toyohashi, Japan | Posted on March 2nd, 2014

To efficiently use Ag as a catalyst, its specific surface area must be maximized by reducing its particle size. Moreover, the development of simple and low-cost synthesis method is highly desired for practical applications.

Now, Tran Viet Thu and colleagues at Toyohashi University of Technology have shown that graphene oxide (GO) sheets can be used as an excellent support for the growth of Ag particles. GO was first prepared from commercial graphite by oxidation and exfoliation in water. Then the Ag-GO hybrids were prepared by a chemical reduction route using GO and silver nitrate as precursors, sodium borohydride as reducing agent, and trisodium citrate as stabilizer.

Transmission electron microscopy imaging showed very small size (3.60.6 nm) Ag particles to be decorated on GO sheets, compared with Ag particles synthesized without GO (tens of nm in size). This decrease in particle size means more Ag atoms were present at the surface and a large increase in the specific surface area. As a result, the Ag-GO hybrids were more efficient for the catalytic conversion of 4-nitrophenol (toxic pollutant) into 4-aminophenol, an intermediate for the production of several drugs. In addition, the Ag-GO hybrids exhibited improved catalytic activity compared to Ag particles synthesized without GO.

The research suggests a low-cost route for the synthesis of catalytic Ag-GO hybrids and highlights the promising use of GO as a support for other functional nanostructures.

Reference:
Authors: Tran Viet Thu, Pil Ju Ko, Nguyen Huu Huy Phuc, and Adarsh Sandhu.
Title of original paper: Room-temperature synthesis and enhanced catalytic performance of silver-reduced graphene oxide nanohybrids.
Journal, volume, pages and year: Journal of Nanoparticle Research 15 (10), 1-13 (2013).
Digital Object Identifier (DOI): 10.1007/s11051-013-1975-9
Affiliations: Electronics-Inspired Interdisciplinary Research Institute (EIIRIS) and Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology

####

For more information, please click here

Contacts:
Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi Prefecture, 441-8580, JAPAN
Enquiries
Toyohashi University of Technology, International Affairs Division

TEL: +81-532-44-6577
or +81-532-44-6546

Copyright © Toyohashi University of Technology

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

Graphene key to growing 2-dimensional semiconductor with extraordinary properties August 30th, 2016

University of Akron researchers find thin layers of water can become ice-like at room temperature: Results could lead to an assortment of anti-friction solutions August 30th, 2016

Nanocatalysis for organic chemistry: This research article by Dr. Qien Xu et al. is published in Current Organic Chemistry, Volume 20, Issue 19, 2016 August 30th, 2016

Continuous roll-process technology for transferring and packaging flexible LSI August 29th, 2016

Meteorite impact on a nano scale August 29th, 2016

Chemistry

Nanocatalysis for organic chemistry: This research article by Dr. Qien Xu et al. is published in Current Organic Chemistry, Volume 20, Issue 19, 2016 August 30th, 2016

Imaging

Meteorite impact on a nano scale August 29th, 2016

Designing ultrasound tools with Lego-like proteins August 29th, 2016

Forces of nature: Interview with microscopy innovators Gerd Binnig and Christoph Gerber August 26th, 2016

New approach to determining how atoms are arranged in materials August 25th, 2016

Graphene/ Graphite

A promising route to the scalable production of highly crystalline graphene films August 26th, 2016

Graphene under pressure August 26th, 2016

Stretchy supercapacitors power wearable electronics August 25th, 2016

Discoveries

Graphene key to growing 2-dimensional semiconductor with extraordinary properties August 30th, 2016

University of Akron researchers find thin layers of water can become ice-like at room temperature: Results could lead to an assortment of anti-friction solutions August 30th, 2016

Nanocatalysis for organic chemistry: This research article by Dr. Qien Xu et al. is published in Current Organic Chemistry, Volume 20, Issue 19, 2016 August 30th, 2016

Meteorite impact on a nano scale August 29th, 2016

Announcements

Graphene key to growing 2-dimensional semiconductor with extraordinary properties August 30th, 2016

University of Akron researchers find thin layers of water can become ice-like at room temperature: Results could lead to an assortment of anti-friction solutions August 30th, 2016

Nanocatalysis for organic chemistry: This research article by Dr. Qien Xu et al. is published in Current Organic Chemistry, Volume 20, Issue 19, 2016 August 30th, 2016

Meteorite impact on a nano scale August 29th, 2016

Tools

Designing ultrasound tools with Lego-like proteins August 29th, 2016

Nanofiber scaffolds demonstrate new features in the behavior of stem and cancer cells August 25th, 2016

50 years after the release of the film 'Fantastic Voyage,' science upstages fiction: Science upstages fiction with nanorobotic agents designed to travel in the human body to treat cancer August 25th, 2016

University of Puerto Rico and NASA back in the news XEI reports August 23rd, 2016

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







Car Brands
Buy website traffic