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Environments 2017, 4(1), 9; doi:10.3390/environments4010009

Photocatalytic Degradation of Toluene, Butyl Acetate and Limonene under UV and Visible Light with Titanium Dioxide-Graphene Oxide as Photocatalyst

Bundesanstalt für Materialforschung und-prüfung (BAM), Berlin 12205, Germany
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Academic Editors: Ki-Hyun Kim and Abderrahim Lakhouit
Received: 21 November 2016 / Revised: 21 December 2016 / Accepted: 13 January 2017 / Published: 25 January 2017
(This article belongs to the Special Issue Volatile Organic Compounds in Environment)
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Abstract

Photocatalysis is a promising technique to reduce volatile organic compounds indoors. Titanium dioxide (TiO2) is a frequently-used UV active photocatalyst. Because of the lack of UV light indoors, TiO2 has to be modified to get its working range shifted into the visible light spectrum. In this study, the photocatalytic degradation of toluene, butyl acetate and limonene was investigated under UV LED light and blue LED light in emission test chambers with catalysts either made of pure TiO2 or TiO2 modified with graphene oxide (GO). TiO2 coated with different GO amounts (0.75%–14%) were investigated to find an optimum ratio for the photocatalytic degradation of VOC in real indoor air concentrations. Most experiments were performed at a relative humidity of 0% in 20 L emission test chambers. Experiments at 40% relative humidity were done in a 1 m³ emission test chamber to determine potential byproducts. Degradation under UV LED light could be achieved for all three compounds with almost all tested catalyst samples up to more than 95%. Limonene had the highest degradation of the three selected volatile organic compounds under blue LED light with all investigated catalyst samples. View Full-Text
Keywords: photocatalysis; emission test chamber; volatile organic compounds photocatalysis; emission test chamber; volatile organic compounds
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MDPI and ACS Style

Mull, B.; Möhlmann, L.; Wilke, O. Photocatalytic Degradation of Toluene, Butyl Acetate and Limonene under UV and Visible Light with Titanium Dioxide-Graphene Oxide as Photocatalyst. Environments 2017, 4, 9.

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