My graphene doped TiO2 activity decrease with time, I am doing gas phase photocatalytic reduction of CO2, Can you please give some valuable suggestions to improve the stability ? my product is methane only
There is no set time, this depends on the conditions of the experiment: mass adsorbent, flow rate, and other.
@Dear Edith, definitely conditions affects the system, but my question is regarding activity when all other condition are fixed/constant, then what?
To get high and stable photocatalytic activity, it is necessary to increase separation efficiency of the photogenerated electrons. Existence of graphene may offer more active adsorption sites and photocatalytic reaction centers. I think the synthesis temperature may play an important role in this subject. Also, you must to study nitrogen adsorption-desorption isotherm of graphene doped TiO2 composites , observe porous type , BET, and pore size.
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