TY - JOUR
T1 - Advanced ceramics in radical filtration
T2 - TiO2 layer thickness effect on the photocatalytic membrane performance
AU - Heredia Deba, Shuyana A.
AU - Wols, Bas A.
AU - Yntema, Doekle R.
AU - Lammertink, Rob G.H.
N1 - Funding Information:
This work was performed in the cooperation framework of Wetsus, European Centre of Excellence for Sustainable Water Technology, The Netherlands ( www.wetsus.nl ). Wetsus is cofunded by the Dutch Ministry of Economic Affairs and Ministry of Infrastructure and Environment, the European Union Regional Development Fund, the Province of Fryslân, and the Norther Netherlands Provinces. This work is part of a project that has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement 665874 . The authors thank the participants of the research theme “Priority compounds and Virus control” for fruitful discussions and financial support. The authors would also like to thank Nikos Kyriakou and Farzaneh Radmanesh for the help with the preparation of the membranes, Eva Portillo for her assistance in the experiments, Marianne Heegstra and Ineke Punt with the aid with the SEM pictures, and Pim Bullee, Niels Hakkert and Max Kwak for their collaboration in Matlab. All authors have approved the final article.
Funding Information:
This work was performed in the cooperation framework of Wetsus, European Centre of Excellence for Sustainable Water Technology, The Netherlands (www.wetsus.nl). Wetsus is cofunded by the Dutch Ministry of Economic Affairs and Ministry of Infrastructure and Environment, the European Union Regional Development Fund, the Province of Fryslân, and the Norther Netherlands Provinces. This work is part of a project that has received funding from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement 665874. The authors thank the participants of the research theme “Priority compounds and Virus control” for fruitful discussions and financial support. The authors would also like to thank Nikos Kyriakou and Farzaneh Radmanesh for the help with the preparation of the membranes, Eva Portillo for her assistance in the experiments, Marianne Heegstra and Ineke Punt with the aid with the SEM pictures, and Pim Bullee, Niels Hakkert and Max Kwak for their collaboration in Matlab. All authors have approved the final article.
Publisher Copyright:
© 2023 The Author(s)
PY - 2023/4/15
Y1 - 2023/4/15
N2 - 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.
AB - 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.
KW - Photocatalytic layer thickness
KW - Photocatalytic membrane
KW - TiO top layer
KW - Transport and reaction inside the membrane
KW - UT-Hybrid-D
UR - http://www.scopus.com/inward/record.url?scp=85147291518&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2023.121423
DO - 10.1016/j.memsci.2023.121423
M3 - Article
AN - SCOPUS:85147291518
SN - 0376-7388
VL - 672
JO - Journal of membrane science
JF - Journal of membrane science
M1 - 121423
ER -