I am preparing CuO-TiO2 nanocomposite material. I took photoluminescence spectrum of pure TiO2 and CuO-TiO2. The PL peak intensity of CuO-TiO2 nanocomposite is lower than pure TiO2. In general PL intensity decrease means photocatalystic activity high. But my samples are showing lower photocatalystic activity than pure catalyst, why? Please can anybody help me.
I think there are a lot of papers about it You can search it in google chrome. I am not sure but somehow radioactive or nonradioactive phenomenon play important role.
in many case your situation occurs. This review may be bring some clarity of your problem.
Thanks to Johan Rene for sending review to me. I think this is more helpful for me.
Mr. Murugathas Thanihaichelvan, can you suggest some reference papers for "CuO - TiO2 is a p-n pair... So suppression in pl spectra cannot be directly compared" this concept.
Dear Dr. Ganesha raja,
Which light (UV/Visible or both) is used for the photocatalytic degradation of dye?
If it is UV light, check the degradation by using visible light which might enhance the degradation of dye by your composite than TiO2.
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