My sample is barium titanate based and I want to measure UV Visible spectroscopy. I want to know which method is correct
1.0 Dispersing the powder in some solvent or
2.0 Directly the powder itself
I think that the first method is used to measure the UV Visible Spec. on the powder sample. But it need to be carefully treated about dispersing the powder in solvent. I suggest that you try to measure the UV with both methods if you can and compare the results of both processings.
First choice is preffered. you need to have a proper solvent and dilution as the law governing the UV Vis spec holds good for very dilute solutions.
Thankq sir for sparing your time....my doubt is that, whether the powder has to get dissolved in that solvent or it can be in dispersed form..
For measuring UV-visible spectroscopy of your sample as below:
1-dispersed in solvent like ethanol (5 ml) and your sample very low amount (0.001 g) and then you can sonicated for 10 min to reduce the agglomeration after that you can measure.
2- directly as powder you can measured it by Reluctance and then you can convert to absorbance.
both methods all researcher followed
regards
@Muneer M. Ba-Abbad...thankq sir for sparing your time...In my observation the band gaps measured in both cases (1&2) are not tallying each other....what might be the reason for it..
For measuring UV-visible spectroscopy, materials can be studied in various physical states (gas, liquid, solid ...). Most of the time, the study is done in solution.
Water can be used as a solvent for samples that absorb at wavelengths above 190 nm.
if your samples are in the form of a powder, you dissolv it in distilled water and you put the solution into a quartz cell of 10 mm thickness.
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