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doi: 10.4121/21985172

Heredia Deba, Shuyana; Wols, B.A. (Bas); Yntema, Doekle; Lammertink, Rob (2023): Data underlying the publication: Advanced ceramics in radical filtration: TiO2 layer thickness effect on the photocatalytic membrane performance. Version 1. 4TU.ResearchData. dataset. https://doi.org/10.4121/21985172.v1

Dataset

• Organic Chemistry
• Macromolecular and Materials Chemistry
• Inorganic Chemistry
• Analytical Chemistry
• Chemical Engineering

Photocatalytic layer thickness, photocatalytic membrane, radical filtration, TiO2 top layer, Transport and reaction inside the membrane

CC BY 4.0

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by Shuyana Heredia Deba , B.A. (Bas) Wols , Doekle Yntema , Rob Lammertink

Membranes with advanced oxidation processes (AOPs) are a promising combination to separate and degrade organic pollutants in a single system. In this work, we describe the fabrication and characteristics of nine membranes with different TiO2 top layer thicknesses (from 0.26 to 21.9 μm), giving attention to the critical catalyst thickness and the formation of defects. We also report the optimum photocatalyst thickness for our single-layer membranes (∼2.74 μm), after which more titanium dioxide does not improve the degradation. However, an increase in degradation for membranes with multiple TiO2 layers was still possible. These results and the comparisons with the literature suggested that the optimal catalyst thickness is closely related to the material morphology. We obtained a maximum degradation at the lower filtration rate (1.6 L m−2 h−1) of 72% with a single layer membrane of 3.4 μm and 82% with a membrane with six layers of 21.9 μm. Furthermore, a 1D mass transport and reaction model that describes the coating thickness effect was developed and fitted with the experimental data. Other parameters are also discussed, such as light penetration limitations, surface area, and surface reaction rate constant. These results and analysis provide a better understanding of the fabrication and optimization of photocatalytic membranes.

• 2023-02-13 first online, published, posted

4TU.ResearchData

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Advanced ceramics in radical filtration: TiO2 layer thickness effect on the photocatalytic membrane performance

• Dutch Ministry of Economic Affairs and Ministry of Infrastructure and Environment, the European Union Regional Development Fund, the Province of Frysland, and the Northern Netherlands Provinces.
• Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement 665874

Wetsus European Center of Excellence for Sustainable Water Technology
University of Twente, Membrane Science and Technology, Faculty of Science and Technology