I am interested in the photocatalytic mechanism of bare graphene oxide for the degradation of dyes under UV source
Hi Sheetal, In principe, photocatalyst works in UV region if its band-gap in the UV-region. It means its electron can leap to overcome the barrier energy (from HOMO to LUMO level) so that the degradation reaction of dyes is happened. ( remember the chemical reaction is actually electron-transfer !!). I hope this explanation will aid you.
I believe you need to provide more detailed information. Did the dye you used served as senseor target to be decomposed? For garphene alone, if I am not wrong, it can remove compounds only by adsorption and direct electron transfer. but there will be different story when using graphene based composites. Hope this helpful to you.
First, GO will adsorb some dyes (e.g., MB). And then the photocatalys effect under the UV light. Than might be depended on the OH or ROS released by the GO.
Best regards!
Zhenjiang
As others have replied, this depends on the role of graphene oxide (GO). When use alone, GO can act as adsorbent for dye removal. GO is also an electrical insulator, unless you are trying to tune the properties of GO by further reducing it to reduced graphene oxide (rGO). In this instance, rGO is able to accept electrons into its 2D structure and prolonging the recombination of electron-hole pairs.
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