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Photocatalytic degradation of methylene blue by anatase TiO2 coating
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  • Nikolai Desch,
  • Angela Rheindorf,
  • Cornelia Fassbender,
  • Marc Sloot,
  • Markus Lake
Nikolai Desch
Hochschule Niederrhein - Campus Krefeld Sud

Corresponding Author:[email protected]

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Angela Rheindorf
Hochschule Niederrhein - Campus Krefeld Sud
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Cornelia Fassbender
Hochschule Niederrhein - Campus Krefeld Sud
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Marc Sloot
Hochschule Niederrhein - Campus Krefeld Sud
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Markus Lake
Hochschule Niederrhein - Campus Krefeld Sud
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Photocatalytic coatings have the potential to contribute to the purification of water via an advanced oxidation process (AOP) [1]. A commonly used method for analyzing the mechanism of the photocatalytic performance of a given reactor type is to document the degradation behavior in a solution containing methylene blue. However, since methylene blue is rather unstable, the degradation results should be viewed critically. In this work, the degradation behavior of a test solution with methylene blue on quartz glass surfaces coated with photocatalytic titanium dioxide (TiO 2) of the anatase modification was investigated through a variety of different light sources. The coating was deposited by the reactive pulsed DC magnetron sputtering (MSIP-PVD) method described in [2], while the quartz glasses were coated with a 100 nm thick TiO 2 coating. The same glasses were used for all experiments with TiO 2. In the determination of the degradation rate, additional experiments were performed using pure quartz glass without any coating, which made it possible to examine the influence of different light sources on the degradation rate of methylene blue in general. Three different light sources, namely UV-A, UV-C, and simple fluorescent lamps were used in this study. The concentration of methylene blue was recorded by photo spectrometer in 10-minute increments throughout the experiment and the experiments were performed for 24 hours in all cases.
04 Sep 2023Submitted to Applied Research
04 Sep 2023Submission Checks Completed
04 Sep 2023Assigned to Editor
08 Sep 2023Reviewer(s) Assigned
03 Oct 2023Review(s) Completed, Editorial Evaluation Pending
07 Oct 2023Editorial Decision: Revise Major
26 Oct 20231st Revision Received
11 Nov 2023Submission Checks Completed
11 Nov 2023Assigned to Editor
11 Nov 2023Reviewer(s) Assigned
01 Mar 2024Editorial Decision: Revise Minor