I made graphene out of graphite the process involved PVA, as a result of that I couldn't get graphene powder instead I got the combination of graphene and PVA which is a foam.
How can I remove PVA to get pure graphene from my foam ( graphine + PVA )?
Dear Ardalan Montazeri ,
Nice question you asked !
PVA is highly soluble Water and ethanol.So you first filter(watt-man) your foam mixture.then you wash three times with water and ethanol respectively.the remaining filtrate dry it in oven at 60-70 C for overnight.the dry powder you get is pure graphene.
Currently i also doing the same but i used PVP(polyvinlpyrollidon).So i follow the same method and i get pure graphene.PVP and PVA act as a dispersing agent in this method.
Follow this research paper :
doi:10.1088/0957-4484/24/11/115603
In this paper you find that they use PVP as Dispersing agent in this. and you do the same but using PVA.
Hope this answer help you in your further research.
Best and Regards ,
Vishwajit Chavda
I appreciate answer by Dr. Chavada
For more details please see these two papers
1. 10.1088/0957-4484/24/11/115603
2.Efficient removal of organic dyes using a three-dimensional graphene aerogel with excellent recycling stability
Agreed with Dr. Chavada's answer, but I think it's a bit time-consuming; requires several washes with water and ethanol to separate graphene. Similarly, he mentioned PVP; as I worked with but it is complex without a mechanical means including ultrasonication instead of drying; griding, and re-dispersion of dry powder poured into water or ethanol to get graphene flakes separated on the liquid surface. As Grap comes on the surface of the water and can easily be separated by the filter/phase separation media/membrane; Thanks
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials
- Carbon Materials
- Graphite
- Graphene