利用原子层沉积技术提高 ZnO- 和 TiO2- 涂层聚（甲基丙烯酸甲酯）微胶囊的光催化活性以净化水

IF 2 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS

Thin Solid Films Pub Date : 2024-10-30 DOI:10.1016/j.tsf.2024.140552

Marta A. Forte , Ricardo M. Silva , M.Sameiro T. Gonçalves , Rui F. e Silva , Carlos J. Tavares

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引用次数: 0

摘要

聚甲基丙烯酸甲酯（PMMA）是一种常见的日常聚合物材料，可用作提高功能涂层性能的基底。在这项研究中，PMMA 微胶囊（PMMA-MCs）被涂上了光催化金属氧化物薄膜。通过低温（100 °C）原子层沉积 ZnO 和 TiO2，在 PMMA-MCs 上形成了一种三维结构的复合材料。扫描电子显微镜观察证实，ZnO 和 TiO2 薄膜与 PMMA-MCs 基质的球形表面吻合，形成了更大的光催化活性表面积。研究了所制备的 ZnO- 和 TiO2-PMMA-MCs 复合材料对模型污染物亚甲基蓝（MB）矿化的光催化活性。在紫外可见光照射下，ZnO-PMMA-MCs 对 MB 染料的降解效率更高。因此，所提出的核壳结构复合材料的制备方法被认为是开发用于水净化应用的高效热敏材料支撑光催化剂的传统方法的有效替代方法。

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Photocatalytic activity of ZnO- and TiO2- coated poly (methyl methacrylate) microcapsules by atomic layer deposition for water purification

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 °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 ZnO- and 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.

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来源期刊

Thin Solid Films 工程技术-材料科学：膜

CiteScore

4.00

自引率

4.80%

发文量

381

审稿时长

7.5 months

期刊介绍： Thin Solid Films is an international journal which serves scientists and engineers working in the fields of thin-film synthesis, characterization, and applications. The field of thin films, which can be defined as the confluence of materials science, surface science, and applied physics, has become an identifiable unified discipline of scientific endeavor.