Abstract
3D-clay foam support having alveolar open-cell structure of polyurethane sponge was produced by shape memory synthesis to enhance exposed surface area of TiO2 photocatalyst film for both light harvesting and liquid contact. The TiO2-coated alveolar clay foam photocatalysts were characterized in terms of compressive strength, mineral phase, light transmission ability and TiO2 film properties. The photocatalytic performances were evaluated as material and removal efficiencies of CHP solution under UV-A irradiation and TOC analysis. The material efficiency results of the photocatalysts coated with TiO2 films, synthesized by sol–gel method at various pHs, pointed out that the TiO2 film of pH 2 gave the highest CHP removal. It was also selected to repetitively operate in a recycle mode, and 94–96% of fresh CHP removal was retained in all the four runs.












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Acknowledgements
The authors would like to gratefully acknowledge the financial support from the 90th Anniversary of Chulalongkorn University Fund (Ratchadaphiseksomphot Endowment Fund) and the 100th Anniversary Chulalongkorn University Fund for Doctoral Scholarship, Research Assistantship Funding from Faculty of Science, Chulalongkorn University (101th Anniversary), Research Assistantship Funding from Center of Excellence on Petrochemical and Materials Technology Scholarship, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Prof. Dr. Alisa S. Vangnai and Miss Panalee Watthana for toxicity testing and PTT Innovation Institute (PTT INI) for research facilities and Dr. Suwat Soonglerdsongpha, Mr. Jeerawat Hutjaruay, Mr. Nakarin Seesen and Mr. Kittipot Kaksungnoen for valuable advices and analytical assistance.
Funding
The grant 90th Anniversary of Chulalongkorn University Fund (Ratchadaphiseksomphot Endowment Fund) is for carrying research of authors Kamonwan Pinato (Ph.D. Student) and Dujreutai Pongkao Kashima (Thesis Advisor) to fulfill Ph.D. study requirement. The grants, 100th Anniversary Chulalongkorn University Fund for Doctoral Scholarship and Research Assistantship Funding from Faculty of Science, Chulalongkorn University (101th Anniversary), are for tuition fee and monthly stipend of postgraduate student, Kamonwan Pinato. Research Assistantship Funding from Center of Excellence on Petrochemical and Materials Technology Scholarship is for tuition fee of author Kamonwan Pinato.
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Pinato, K., Suttiponparnit, K., Jinawath, S. et al. TiO2-coated alveolar clay foam as a photocatalyst for water detoxification. J Mater Sci 55, 1451–1463 (2020). https://doi.org/10.1007/s10853-019-04052-z
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DOI: https://doi.org/10.1007/s10853-019-04052-z

