I am working on synthesis of graphene. I have studied almost every paper in which sonication is done but the authors haven't mentioned the type of sonication used. Should I go for mechanical sonication or chemical sonication?
Sorry sir, what does chemical sonication means? What kind of chemical we use for that method ?
Sorry sir, what does chemical sonication means? What kind of chemical we use for that method ?
Dear Qaiser... Please elaborate chemical sonication method in detail.
I also search so many papers regarding synthesis of graphene by sonication method but I did not get the exact time limit of sonication.
can we use normal sonication method or probe sonicator.
Dear all,
Whatever is discussed in the literatures for synthesis of graphene, it is mechanical sonication to the best of my understanding...
You neednot use any chemical
My experience on graphene oxide dispersions has shown me that 1-1,5h sonication could give you a sufficient solution of GO. I have also noticed that it is important to shake the solution every 10-15 min, during sonication. It is important to consider the solvent and the sonication power you use. In particular, sonic probe focusses the power at much smaller volume and you should be very careful, because too much sonication may increase the number of defects in graphene plane.
Dear all
I also focus on sonication work these days but could not getting good result.
Can anyone suggest me appropriate synthesis process of graphene from graphite by sonicator.
Thanks in advance
You can just use the mechanical sonication bath (not probe sonication) and sonicate graphite crystallites (mechanically and manually obtained from HOPG by means of blade) for 100 hours. That should work. As a solvent you can use DMF or NMP (N-methyl-pyrolidine).
Good luck)
Dear Denis, Thanks for your answer
I tried it with 100 hrs but problem is that, it is time taken and after 100 hr the particle size means graphene sheet size become very small.
I want to know is it possible with another solvent and with less time of sonication.
Thanks in advance
Dear Mohammad, thant is true. The flakes are small in that process indeed. I wish you good luck in searching of the method.
Nice discussion. @Ehtisham & @Denis can you cite papers? what is the minimum size and crystal structure you detected?
Hi, Junaid. Just noticed you question. Sorry for the late response. Please, try these articles, and follow the link therein.
Probe sonication imparts higher energy to the graphene sheets at a faster rate there by decreasing size of graphene sheets exfoliated in the process.
sorry..can I know the function of sonication in graphene oxide synthesis? can someone tell me
The tendency of solvent molecule insertion into graphite is the main factor that yields exfoliated of graphite. Generally, low power sonication can do the job if you select the right solvent. However, to truly confirm if it is graphene or not, TEM, Raman or AFM measurements are required.
Prof. Stengl has published the most sophisticated research about ultrasonic graphene synthesis. His methods are used today for industrial production of graphene.
Article Preparation of Graphene by Using an Intense Cavitation Field...
Article Direct delamination of graphite ore into defect-free graphen...
Article A green method of graphene preparation in an alkaline environment
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials
- Carbon Materials
- Graphite
- Graphene