Recently, many publication related to photocatalyst material supported on activated carbon (AC), for example: water pollutant adsorption-degradation and CO2 reduction applications.
My question for discussion:
1. [for water pollutant adsorption application] Is it the promising concept due to the large surface area of the AC can promote the adsorption of the pollutant molecule and further the pollutant will degrade by photocatalyst material?or the removal of pollutant is dominated by the adsorption process?Since the surface of activated carbon itself has dark color which will absorb light. Is the AC will promote photocatalytic activity?or reduce photocatalytic activity?
2. [for CO2 reduction application] Is it possible that photocatalyst will degrade the AC itself?and the process will produce gas ,such as CO, or another organic compound that causes error to determine the photocatalytic performance?
Thank you for your attention.
Water pollutant adsorption-degradation and CO2 reduction are absolutely different processes.
An adsorbed pollutant molecule should move on the surface of AC to react with a catalyst. This is 2-dimenthial process, which strongly depend on a catalyst load, surface properties, etc. There is no general answer for this question,
A photosensitizer is required for photochemical reaction. AC just absorbs light without formation of an exited state.
Activated carbons are different, the photodegradation can't be ruled out.
Dear Professor Yurii V Geletii
Thank you very much for your answer and advice.
I have revised and classified the questions as above related to the role of AC as support of photocatalyst.
Irwan Kurnia
Few years back, i have read a paper where they had used combination of TiO2 and cellulose fiber. The photocatalytic efficiency had decreased.
Article Photocatalytic degradation of paracetamol on TiO 2 nanoparti...
Photocatalytic degradation of paracetamol on TiO2 nanoparticles and TiO2/cellulosic fiber under UV and sunlight irradiation
Aarif Shah
What is the difference between cellulose fibre and cellulosic fiber? The question was about activated carbon.
Yurii V Geletii Sir, cellulosic fiber is the fiber that is derived from cellulose. Cellulose also contains C
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