I just made Graphene Oxide(GO) by modified Hummer's method and then tried to coat magnetic materials on it changing GO into RGO. Yet, the result was awful that the magnetization of the final coated-RGO disappered.
So, I decided to make a guess what was the problem?
I doubt either the recipe by which the magnetic material was coated or the condition of GO (Maybe because of graphite-oxide, but I need graphene-oxide)
As far as I know, the Utilization of AFM, TEM and XRD is helpful to figure out how much exfoliation is going. I made an analysis of this sample(GO) by an XRD instrument. I can see the very sharp shape. (No data about TEM or AFM)
I interpreted this shape as the big d-spacing (well-exfoliated)
I need to know other potential reasons about not working.
I'd appreciate it if you'd help me.
You can calculate intergallery distance between the sheets from XRD for both samples (graphite and graphite oxide) with Bragg equation.
Bragg’s equation as defined
Lambda: 1/ 2dSinTheta
where d is the spacing between sheets; lambda, the wavelength
of X-ray (0.154 nm); and theta, the angle of diffraction.
differences between two measurement can give you exfoliation degree of oxidation process.
Perhaps the reduced material is still so damaged that it has lost the conjugated network of carbons that provide conductivity. UV-Vis before and after oxidation/reduction should show this change. Also XPS may help verify composition at each step.
Zehra Durmus
- Why couldn't I think of the calculation of d-spacing for pure graphene as long as GO ?
Thank you for your idea !!
Aleks Antic
- Does it means that magnetic material-coated reduced graphene oxide is too damage to have magnetization? I already obtained XPS and FT-IR data. If your guess is right, maybe recipe or my control of the recipe must have made the wrong result. Thank you :)
Thank you all ! This is my first question, but I have so heartful replies, beautiful place here
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