ON-LINE MEASUREMENT OF PHOTOCATALYTIC ACTIVITY OF POWDERED SAMPLES

1 MASAŘ Milan
Co-authors:
1 MACHOVSKÝ Michal 1 URBÁNEK Michal 1 URBÁNEK Pavel 1 ANTOŠ Jan 1 KUŘITKA Ivo
Institution:
1 Tomas Bata University in Zlin, University Institute, Centre of Polymer Systems, Zlin, Czech Republic, EU
Conference:
8th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 19th - 21st 2016
Proceedings:
Proceedings 8th International Conference on Nanomaterials - Research & Application
Pages:
275-279
ISBN:
978-80-87294-71-0
ISSN:
2694-930X
Published:
17th March 2017
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
13 views / 10 downloads
Abstract

A method for on-line measurement of photocatalytic activity of powdered samples by UV-Vis spectrometry is demonstrated. It enables photocatalytic reaction to be monitored directly in the cuvette which also serves as photocatalytic reactor. The cuvette is placed inside a double beam UV-Vis spectrometer and photocatalytic reaction is driven by LED diode mounted on homemade cuvette holder housing. Diodes can be easily changed, enable photocatalytic reaction to be performed under light of various wavelengths which is beneficial when evaluating visible-light photocatalytic activity. Another advantage of the method presented lies in the simultaneous degradation of model dye solution and monitoring of reaction kinetics, which avoid sampling during the photocatalytic reaction. Measurement of photocatalytic activity is demonstrated on degradation reaction of Methylene blue 2B as the model dye by Zn2TiO4 powder under the UV (λ~ 365 nm), and the visible light (λ~ 400 nm) and (λ~ 425 nm) irradiation.

Keywords: Photocatalysis, semiconductor, LED diode, photocatalytic reactor, powder material, on-line measurement
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