High-Quality Reduced Graphene Oxide by a Dual-Function Chemical Reduction and Healing Process

Scientific Reports 3, Article number: 1929 (2013)

doi:10.1038/srep01929

High-quality reduced graphene oxide-nanocrystalline platinum hybrid materials prepared by simultaneous co-reduction of graphene oxide and chloroplatinic acid

Nanoscale Research Letters

December 2011, 6:241

It is true that plenty of literature are available on rGO synthesis. Could you please mention (not in detail) what is the purpose of the high-quality rGO, based on that one can suggest.

Hi Sungjae Lee,

What did you mean by high quality reduced graphene oxide??? Are you talking about the effectiveness of reduction???

 The reduction can be broadly divided into one of the following methods,  such as

You can chose any of the appropriate method according to your application... (Also keeping the yield in mind)

In all above mentioned methods you can obtain pristine graphene to varying degree...

For example, In chemical reduction method, many strong and mild reducing agent were used according to different applications...

If you mention that for what purpose do you need reduced graphene oxide, we can suggest you something...

The amount of reduction solely depends on your application...

 Thanks your interest. I will try to blend polyamide with well dispersed rGO. The most important goal is electrical conductivity within polymer matrix. So i just want effective way to make reduced all functional group (like carboxyl, hydroxyl and epoxy) GO.

Dear Sungjae Lee,

Since you are going to blend with polyamide, you can use chemical reduction (which add functionality to groups already present on the graphene oxide) . Hence, you will be having other groups to graphene oxide. These chemically modified graphene sheets provides for either covalent or non-covalent attachments. 

The complete removal of the functional groups will give you increased conductivity but due to the lack of functional groups you may lose the proper blending... So you have to find the optimum level of removing the fictionalization. I can suggest you to use mild reducing agent (the usage of strong reducing agent not only removes the functional groups but also damages the structure of graphene sheets, which in-turn affects your sample's conductivity)  like L-ascorbic acid, so that you may left with some functional groups which will help you in blending. 

Apart from Sridhar's suggestions, you can try hydrothermal method for reducing your graphene oxide to reduced graphene oxide. This method, where electrical conductivity is up to the mark as well as functional groups left during reduction help to form composite, has been employed for making the composite in various aspects. However, your polyamaide is positively charged, so that your surface have to have some negetive charge for proper blending.