I have synthesised CuO nanoparticles with band gap of 2.3 eV which falls in visible light range. But my material is showing photodegradation of dye in UV light instead of Sunight. What can be a possible reason?
Dear Aarti Sharma,
The reason can depend substantial on specific characteristics of your sample. Some reasons could by the influence of the nanoparticles size, interaction between nanoparticles and material supporting them, ....
Hi,
Which substrate you are using for CuO deposition/growth?. It can be due to substrate effect.
Dear Filipe and Avishek
I am not using any substrate to deposite CuO NPs. I hve prepared Spherical shape CuO nanoparticles by precipitation method and then dispersing it in water dye solution to study photocatalytic degradation of dye.
Dear Dr. Sharma:
Measurements based on Photoluminescence (PL) spectra can provide a useful insight in the observed phenomenon, consider see if possible the paper in attachment. Nanoparticle type oxide interacting with metallic nanostructures or nanoparticles gives interesting photonic phenomena.
Best regards
Dear Arati
I think you should do again your experiment under visible light irradiation (400-800 nm). I am sure your catalyst should active under visible light because your catalyst bandgap show itself the concluding remark. BTW, if I am right the whole sunlight contains UV light to NearIR source then how you tell your catalyst active under UV not other. And I am agree with Respected Prof. Marcos's view that SPR (LSPR) plays main role. So, I suggest you again you can do your experiment....Best Luck.
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