AI Article Synopsis
- This work introduces a new method and reactor design for assessing photocatalytic activity that enables ongoing monitoring of pollutant levels in liquid dispersions with photocatalysts.
- The traditional Beer-Lambert law can't be directly applied here due to issues with light scattering from the photocatalyst, so a modified absorption law has been developed to account for both absorption and scattering effects.
- The innovative method shows a high level of accuracy, with an average deviation of just 1.04% over 500 measurements, and is positioned as a quicker and more reliable alternative to existing photocatalytic measurement techniques.
Article Abstract
This work presents a novel method and reactor design for measuring photocatalytic activity. This method allows continuous in situ monitoring of the decrease in pollutant concentration in a liquid dispersion containing the tested photocatalyst. Due to the presence of the photocatalyst in the liquid dispersion, the standard Beer-Lambert absorption law cannot be used directly to determine pollutant concentration in photocatalytic measurements. Therefore, the presented in situ measurement method also utilizes a newly derived modification of the absorption law, which, in addition to absorption, also considers the scattering effect caused by the dispersed photocatalyst. Repeated correlation analysis showed an average deviation of only 1.04% from approximately 500 measurements. At the same time, the measured points obtained by the presented method were within the uncertainty intervals of the standard method for measuring photocatalytic activity. It has been demonstrated that this novel continuous in situ measurement method can replace the current standard measurement method and can provide an even more consistent and faster way of testing photocatalytic materials. In addition, a novel and open source (patented experimental setup for the photocatalytic reactor system, consisting of a spectrometric laser and probe, is fully described in this paper.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11618616 | PMC |
| http://dx.doi.org/10.1038/s41598-024-80585-x | DOI Listing |
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