Graphene having ~0.34nm and GO having ~ 0.8nm inter planar distance. These two are well known. What is the interplanar distance of a chemically derived graphene. Is it different than the both G and GO or the same?
The inter layer spacing can be easily obtained from XRD.
The inter planner distance depends on the concentration of the oxygen functional groups on the surface of the carbon layers. In the case of the graphite the inter planner distance is 0.33 nm. In the case of the chemically reduced graphene oxide it will be around 0.38 nm. The increase in the d spacing of the CRGO when compared to graphite is due to the presence of the oxygen functional groups in between the layers.
Thanks Santosh,
For giving me the useful information. I could know the value of inter planar spacing for chemically derived graphene from the Author it self. He said that it is around 0.5 nm for the sample they used. The new thing I knew that it is vary with concentration of the oxygen functional groups.
Thanks Christian....
A little modification in my question. It is not single layer. My opinion about few layer graphene, GO and chemically derived graphene.
Hi Christian,
In the case of graphene oxide you can define inter planner distance. Graphene oxide material always consist of few layers of sheets with a typical spacing of 0.7 - 0.8 nm. In the XRD you will find a broad intense peak around 11-12 deg and the larger FWHM of the diffraction peak indicates the amorphous nature of the graphene oxide.
cheers,
santosh.
Hi santosh,
From my knowledge the broad peak at the range of 11-12 deg is responsible for Graphite oxide not graphene oxide.
According to our experiment result of XRD of graphene oxide powder that synthesis using Hummer methode. We only found one peak at 11 deg and not strong enough but it can be identified.
After thermally reduction at 500 deg Celcius, the reduced graphene oxide powder has broad XRD peak at 25 deg.
Actually graphite has an interplanar spacing (002) of 0.338 nm. In fact, chemically reduced graphene can have any value of interplanar distance below that of GO you have. the more the reduction the lower it will be or more it will be close to 0.338 nm.
There is a high possibility of having higher inter planer distance in case of few layer thick graphene oxide due to the intercalation of water during the probe sonication step of synthesis using Hummers process.
I agree with Christian Punckt. If you find inter-planar distance for graphene or graphene oxide, you can not use those name. You must use the term as graphite and graphite oxide. Of course, preparation of single layer of graphene/graphene oxide is not possible or difficult.
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