resumo
Poly (methyl methacrylate) (PMMA) is a common everyday polymer material that can be used as a substrate to improve the performance of functional coatings. In this work, PMMA microcapsules (PMMA-MCs) are coated with photocatalytic metal-oxide thin films. A low temperature (100 degrees C) atomic layer deposition of ZnO and TiO2 on PMMA-MCs is described to form a three-dimensional structured composite. Scanning electron microscopy observations confirms that the ZnO and TiO2 thin films are conformal to the spherical surface of the PMMA-MCs substrates, creating a greater photocatalytic active surface area. The photocatalytic activity of the prepared ZnOand TiO2-PMMA-MCs composites towards the mineralization of methylene blue (MB), a model pollutant, are investigated. Under UV-VIS irradiation, the ZnO-PMMA-MCs are more efficient towards MB dye degradation. Therefore, the proposed preparation approach for core-shell structured composites is considered as a valid alternative to the conventional routes for the development of efficient supported photocatalysts in heat sensitive materials for water purification application.
palavras-chave
POLY(METHYL METHACRYLATE); TIO2; DEGRADATION; FABRICATION; NANOSTRUCTURES; GROWTH
categoria
Materials Science; Physics
autores
Forte, MA; Silva, RM; Gonçalves, MST; Silva, RFE; Tavares, CJ
nossos autores
Ricardo Manuel Fonseca Lopes da Silva
Técnico SuperiorProjectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
agradecimentos
Marta Forte acknowledges the PhD grant from Fundacao para a Ciencia e Tecnologia (FCT) with the reference: PD/BD/12849/2017. The authors acknowledge the funding from the Fundacao para a Ciencia e Tecnologia (FCT, Portugal) /PIDDAC through the Strategic Funds project reference UIDB/04650/2020-2023 and UID/QUI/00686/20121) . This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by National funds through the FCT/MEC (PIDDAC) .r project reference UIDB/04650/2020-2023 and UID/QUI/00686/20121) . This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MEC (PIDDAC) .