Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Improved synthesis of graphene oxide and its application to nanocomposites

Fig. 1. Promising applications of graphene oxide
Fig. 1. Promising applications of graphene oxide

Abstract:
Research Core for Interdisciplinary Sciences
Assistant Professor, Yuta Nishina

We have developed a method for the rapid preparation of graphene oxide (GO)—a strategically important material for future technology (Fig.1).

The most common method for synthesizing GO is the Hummers' method (oxidation with KMnO4 and NaNO3 in concentrated H2SO4), which requires a long reaction time and large amounts of reagents. In our research found that the microwave irradiation of natural graphite flakes before the oxidation step improved the efficiency of the oxidation process. This facile method provides a greater amount of GO compared with the original Hummers' method. We expect our rapid synthesis method based on microwave irradiation to make a major contribution to the large-scale production of GO.

Improved synthesis of graphene oxide and its application to nanocomposites

Okayama, Japan | Posted on June 20th, 2013

Patent information: Japanese patent No.5098064

Graphene is a promising support material for Pt nanoparticles, which triggered much interest in metal/graphene composites. In some cases, however, graphene-supported metal species are not preferred, because the interaction between the metal particles and graphene is quite weak due to the graphene itself is being relatively chemically inert due to the strong sp2 and π binding between carbon atoms in the graphene plane. Consequently, the metal nanoparticles are mobile on graphene, which leads to limited applications of metal/graphene composites. It has been proposed that defects or mechanical strain in graphene can significantly increase the chemical reactivity of graphene itself and also enhance the interaction between metal nanoparticles.

Therefore, GO offers significant advantages for the synthesis of composites with inorganic materials and organic polymers due to its large amounts of oxygen functionality. As an application of our GO, metal nanoparticles were supported on its surface. We succeeded to synthesize Pt, Pd, Rh, Ir, Cu, etc. nanoparticles on GO via solution processes. Controlling the degree of oxidation of GO and the oxidation state of metal species will offer a wide range of applications of metal/GO composites such as electrodes, fuel cell catalysts, and catalysts for chemical synthesis. We showed that the Pd/GO composite exhibited superior catalytic activity in selective hydrogenation and cross coupling reactions.

Japanese patent application No.2012-201088

####

About Okayama University
Okayama University is one of the largest comprehensive universities in Japan with roots going back to the Medical Training Place sponsored by the Lord of Okayama and established in 1870. Now with 1,300 faculty and 14,000 students, the University offers courses in specialties ranging from medicine and pharmacy to humanities and physical sciences. Okayama University is located in the heart of Japan approximately 3 hours west of Tokyo by Shinkansen.

For more information, please click here

Contacts:
Okayama University
1-1-1 Tsushima-naka , Kita-ku ,
Okayama 700-8530, Japan
Planning and Public Information Division

Copyright © Okayama University

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

Assistant Professor Yuta Nishina website:

Related News Press

News and information

Argon is not the 'dope' for metallic hydrogen March 24th, 2017

Promising results obtained with a new electrocatalyst that reduces the need for platinum: Researchers from Aalto University have succeeded in manufacturing electrocatalysts used for storing electric energy with one-hundredth of the amount of platinum that is usually needed March 24th, 2017

Leti Presents Advances in Propagation Modeling and Antenna Design for mmWave Spectrum: Paper Is One of 15 that Leti Presented at European Conference on Antennas and Propagation March 19-24 March 23rd, 2017

Rice U. refines filters for greener natural gas: New study defines best materials for carbon capture, methane selectivity March 23rd, 2017

Graphene/ Graphite

Intertronics introduce new nanoparticle deagglomeration technology March 15th, 2017

Space energy technology restored to make power stations more efficient: Scientists use graphene to reinvent abandoned heat energy converter technology March 7th, 2017

Graphene sheets capture cells efficiently: New method could enable pinpoint diagnostics on individual blood cells March 3rd, 2017

Applied Graphene Materials plc - Significant commercial progress in AGM’s three core sectors March 3rd, 2017

Discoveries

Argon is not the 'dope' for metallic hydrogen March 24th, 2017

Promising results obtained with a new electrocatalyst that reduces the need for platinum: Researchers from Aalto University have succeeded in manufacturing electrocatalysts used for storing electric energy with one-hundredth of the amount of platinum that is usually needed March 24th, 2017

Rice U. refines filters for greener natural gas: New study defines best materials for carbon capture, methane selectivity March 23rd, 2017

Artificial photosynthesis steps into the light: Rice University lab turns transition metals into practical catalyst for solar, other applications March 23rd, 2017

Materials/Metamaterials

Argon is not the 'dope' for metallic hydrogen March 24th, 2017

Promising results obtained with a new electrocatalyst that reduces the need for platinum: Researchers from Aalto University have succeeded in manufacturing electrocatalysts used for storing electric energy with one-hundredth of the amount of platinum that is usually needed March 24th, 2017

Rice U. refines filters for greener natural gas: New study defines best materials for carbon capture, methane selectivity March 23rd, 2017

Artificial photosynthesis steps into the light: Rice University lab turns transition metals into practical catalyst for solar, other applications March 23rd, 2017

Announcements

Argon is not the 'dope' for metallic hydrogen March 24th, 2017

Promising results obtained with a new electrocatalyst that reduces the need for platinum: Researchers from Aalto University have succeeded in manufacturing electrocatalysts used for storing electric energy with one-hundredth of the amount of platinum that is usually needed March 24th, 2017

Rice U. refines filters for greener natural gas: New study defines best materials for carbon capture, methane selectivity March 23rd, 2017

Artificial photosynthesis steps into the light: Rice University lab turns transition metals into practical catalyst for solar, other applications March 23rd, 2017

Patents/IP/Tech Transfer/Licensing

Harris & Harris Group Issues Its Financial Statements as of December 31, 2016, Posts Its Annual Shareholder Letter, And Will Host a Conference Call for Shareholders on Friday, March 17, 2017 March 15th, 2017

Intertronics introduce new nanoparticle deagglomeration technology March 15th, 2017

Keystone Nano Announces The US FDA Has Awarded Orphan Drug Designation For Ceramides For The Treatment Of Liver Cancer November 8th, 2016

Leti to Tackle Tomorrow's Research Strategies with Stanford University’s SystemX Alliance: French R&D Center Is the First Research Institute to Join the Collaboration and Provides Bridges Between Academia and Industry, Leveraging Alliance’s Potential October 4th, 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