I did photocatalytic hydrogen production experiments using TiO2 as a catalyst and i got around 3.0mmol g-1h-1 and used 300W Hg/Xe lamp. I need to calculate quantum efficiency. if anybody experts in this can u suggests me how to calculate?
What do you mean the "theoretical?" You can determine the experimental value but I need to measure the number of absorbed (consumed) photons
Dear Yurii,
I need to calculate quantum efficiency. How can findout number of photons consumed?
It's not easy. Briefly. You need to use collimator lenses to create a rather narrow light beam and use the reactor with a flat wall. I would also use two cut off filters to have a light with a desired range of wavelengths. The total amount of photons irradiated by the light source can be measured/calculated by a light power meter. I would attempt to use conditions when all light is absorbed in the reactor. There are numerous examples described in the literature.
Dear Manjunath, this paper might help you to find out the quantum yield.
Energy Environ. Sci., 2015,8, 2668-2676
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