I want to know what are the best methods to prepare graphene?
Is there any possibility that PVD can also be used for this or its totally inappropriate?
There is no the best method existing. As Ravi has already pointed out, depending on what kind of quality and amount you need. Pristine graphene prepared by mechanically method is limited to small amount suitable for high-quality needed for fundamental research. CVD is high-cost but produce high-qulaity single- or few layer graphene, suitable for Electronic application such as transistirs. Wet-Chemical methods allow to produce graphene oxide (GO) and reducded graphene oxide (rGO) with low cost and scale-up possibility. GO and rGO are normally good enough for energy devices such as supercapacitors and batteries and sensors.
the best method to prepare graphene in bulk amount is chemical synthesis of graphene by Hummers modified method
Its depends on your application...
Ideally CVD is a one of the best methods to grow, large area single layer graphene with less defects...
On the other hand, chemically derived graphene will have lot of dissorder on layers and oxygenated functional group defects...
Mechanically exfoliated graphene also a good one but, achieving large quantities is difficult.....
There is no the best method existing. As Ravi has already pointed out, depending on what kind of quality and amount you need. Pristine graphene prepared by mechanically method is limited to small amount suitable for high-quality needed for fundamental research. CVD is high-cost but produce high-qulaity single- or few layer graphene, suitable for Electronic application such as transistirs. Wet-Chemical methods allow to produce graphene oxide (GO) and reducded graphene oxide (rGO) with low cost and scale-up possibility. GO and rGO are normally good enough for energy devices such as supercapacitors and batteries and sensors.
you can search about Hummers modified method or TOur's method ...
Hummers modified method is the best one ..
For large, highest-quality sheets of graphene preparation , one of best methods is electrolytic exfoliation (Lithium intercalation) . http://pubs.rsc.org/en/Content/ArticleLanding/2012/JM/C2JM00092J#!divAbstract . Madagascar graphite is best raw material.
Relative high quality graphene and graphene coatings (most needed) can be prapared by reduction of available graphene oxide (GO) - look at files in attachment
Dear all
Thank you so much for your participations.
How bulky graphene materials; Are there any ideas or methods about it, Please?
Thanks a lot.
Sadeem
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