Compact device for in situ ultraviolet-visible spectrophotometric measurement of photocatalytic kinetics

In this work, we have designed a compact device that can be easily integrated with Ultraviolet-Visible spectrophotometers, utilizing Light Emitting Diode technology for in situ spectrophotometric measurements of photocatalytic reactions. Using our device, we present the test results for the breakdown of amaranth dye with Degussa P25 powder and compare them with those obtained from a conventional arc discharge reactor. The results show that the reaction constants obtained using our device are practically equivalent to those acquired with a conventional reactor. However, our device significantly simplifies the experimental task by requiring less test solution volume and fewer user interventions while enabling in situ monitoring of the reaction kinetics. Overall, the proposed approach offers a convenient and efficient means of studying photocatalytic materials for dye degradation. (c) 2023 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Automated summary

In this study, a compact device was designed for in situ spectrophotometric measurements of photocatalytic reactions using Light Emitting Diode technology and was integrated with Ultraviolet-Visible spectrophotometers. Test results for the breakdown of amaranth dye were presented using this device and compared with results obtained from a conventional arc discharge reactor. The reaction constants obtained using the device were practically equivalent to those acquired with the conventional reactor, simplifying the experimental task and enabling in situ monitoring of the reaction kinetics.