Superhydrophobic composite coatings for photocatalysis and oil–water separation: durable and eco-friendly solutions for industrial applications

IF 3.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Materials Science Pub Date : 2024-10-21 DOI:10.1007/s10853-024-10292-5

Honghong Wei, Xiangyou Lu, Yuanlai Xie, Jie Liang, Dong Xu, Yingqing Wu

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Abstract

Synthesized DE@HTDMS-SiO₂ particles loaded with TiO₂ nanoparticles, linked to adhesive epoxy resin and the green hydrophobic agent cetyltrimethoxysilane, were utilized to fabricate superhydrophobic composite coatings on various substrates using a simple spraying technique. The resulting composite coating exhibited a contact angle of 156.6° and a rolling angle of 7.6°, demonstrating excellent self-cleaning properties, antifouling capabilities, and durability. The photocatalytic performance was evaluated by using visible light from a 220 W incandescent lamp as a light source. The results indicated that the composite coating could degrade both RhB and MB solutions by over 90%. In a custom-made oil–water separation device, the composite-coated cotton fabric achieved a separation efficiency exceeding 96% for mixtures of n-hexane and diesel. Even after 10 cycles of repeated separation, the efficiency remained above 89%. This underscores the composite coating’s remarkable photocatalytic performance and its capacity for efficient, recyclable oil–water separation. Furthermore, the hydrophobic angle of the composite superhydrophobic glass sheet decreased by only 2.3° after undergoing a three-month outdoor aging experiment. Additionally, the composite-coated cotton fabric maintained a certain level of hydrophobicity even after being submerged in a strong alkali solution for 24 h.

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用于光催化和油水分离的超疏水复合涂料：工业应用中的耐用和环保解决方案

利用合成的 DE@HTDMS-SiO2 颗粒负载 TiO2 纳米粒子，并与粘合剂环氧树脂和绿色疏水剂十六烷基三甲氧基硅烷相连接，采用简单的喷涂技术在各种基底上制造出超疏水复合涂层。所得复合涂层的接触角为 156.6°，滚动角为 7.6°，显示出优异的自清洁性能、防污能力和耐久性。利用 220 瓦白炽灯发出的可见光作为光源，对光催化性能进行了评估。结果表明，复合涂层对 RhB 和 MB 溶液的降解率均超过 90%。在定制的油水分离装置中，复合涂层棉织物对正己烷和柴油混合物的分离效率超过 96%。即使在重复分离 10 次之后，分离效率仍保持在 89% 以上。这凸显了复合涂层卓越的光催化性能及其高效、可回收的油水分离能力。此外，经过三个月的室外老化实验后，复合超疏水玻璃板的疏水角仅下降了 2.3°。此外，复合涂层棉织物在强碱溶液中浸泡 24 小时后仍能保持一定的疏水性。

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.