I have synthesized Cu2O by chemical synthesis method. The size of the nanoparticles is found to be 27nm from XRD data. In UV spectrum one peak is at 543 nm and another at 782 nm. What implies the 2nd peak ?
Sorry, Unniyarcha K.K ,
but there is no peak at '782nm'.
Please have a look at your spectrum; at that position there is only a tiny noise peak....
Please do not absolutely trust in automatic data evaluation. Please have always a clear and critical view onto your measured data as well as on the results of automatic data evaluation.
Best regards
G.M.
Dear Unniyarcha K.K,
Please try by reducing the concentration of the nanomaterials. Take a proper baseline correction- It may help you. Scan till the required wavelength (eg. up till 800 nm).
Unfortunately, Unniyarcha K.K , the figure you attached shows only one peak at 543 nm and there is a tiny noise at 782 nm. So, you have to develop a clear understanding of Cu2O samples so that you can easily first identify the results manually rather than trusting some kind of automatic data evaluation software.
I should point out that this is not a UV spectrum. It covers the visible region and part of the near infrared. 543 nm is actually green light. There appears to be another broad peak at about 915 nm (I would say this is typical of hydrated Cu2+ that is Cu with a number of water ligands). The absorbances are also very large - some dilution will be advantaneous.
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