It is supposed that we got graphene. However, we have two peaks inverted in near 300 and 200 nm.
the graph is little bit unusual or weird for me, because based on the graph, it can be seen that the sample absorbed light for all visible region, and the absorbance at UV region are less than the absorbance at visible region. This condition usually appeared from the inorganic sample with specific color, but the inorganic samples with specific color have absorbance at visible region with some peak at certain wavelength (not almost flat or absorbed all range of visible region). Is your sample a single solution? or mixture of some solutions with different color? the sample is organic compound or inorganic compound?
Mr. Mahmoud,
The DRS data are assigned like solution UV-VIS ones, accounting for condense phase effects, however.
Dear Permana,
my sample is organic substance graphene with Distilled water only
Dear Mahmoud,
Ohh, so your sample is graphene solution, this information makes the analysis become easier. As long as i know, graphene has a good capability to absorb the white light, it means graphene will absorb all lights at visible region, and your graph has proved those theory/ statement (it can be seen at the graph that the sample absorbed the light starts from 380nm until 780nm). Is your sample appear as clear solution? or is it just like a particle suspension in water?
Dear Permana,
It is a clear solution.. I made dilution 1: 10 before my measurement. What about the region from 200 to 350nm. It is supposed to have a peak at 270nm (graphene) or 230nm (graphene oxide)
Dear Mahmoud,
like i said before, your graph is litle bit weird for me, because usually for organic compounds, the sensitivity of detection at UV region is bigger than at visible region, but your graph shown the oposite, that is why i were questioning about the appearance of your sample, because usually this problem caused by unclear solution of sample.
if we observe the graph, there is a peak nearly 270nm, but the peak is overlapped by another peak near 300nm. is it possible for you to remeasure the sample with double concentration? because the absorbance is too low, around 0.300 absorbance, absorbance below 0.300 is tend to influence by "noise".
Dear Mahmoud,
Is the graph pattern of the new sample identic with the first one?
Mr. Mahmoud ,
If you are sure that this is not DSC, then it is not measured as absorbance too. It is rather T% measurement of nano-'solution'. 'Solutions' of nano-particles also look transparent like the homogeneous solutions. But they are not.
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