Which outcome occurs when a photocatalytic reactor's light intensity exceeds optimum for pollutant degradation?

💡 Explanation

When light intensity exceeds the optimum for photocatalysis of pollutants, the electron-hole generation rate drastically increases, because the electron-hole pairs recombine before reacting with pollutants, thus reducing efficiency. Therefore recombination rate limiting results, rather than surface reduction, enhanced transport, or impossible quantum yield.

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