Wang Haoguang, Huang Bo, Miao Xinrui, Deng Wenli
College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China.
College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China.
J Colloid Interface Sci. 2025 Dec;699(Pt 1):138150. doi: 10.1016/j.jcis.2025.138150. Epub 2025 Jun 10.
Since most superamphiphobic coatings contain fluorinated materials, finding eco-friendly alternatives is essential. In recent years, researchers have focused on integrating eco-friendly photocatalytic materials into superhydrophobic coatings to degrade organic pollutants effectively. We successfully designed a porous ZrO@TiO (porous ZT) photocatalyst using a combination of the solvothermal, sol-gel, and calcination methods. Porous ZT was modified with polydimethylsiloxane (PDMS) to create a kind of ZrO@TiO@PDMS (porous ZTP) suspension. The ZTP suspension was then sprayed onto various substrates and heated at 400 °C for 2 min to produce a porous ZrO@TiO@PDMS (porous H-ZTP) composite coating. The porous H-ZTP coating demonstrates extremely low surface energy (2.37 mN/m), allowing it to prevent contamination from various liquids encountered in daily life while exhibiting outstanding superhydrophobic properties (WCA > 160°, SA < 2°). Additionally, it can decompose organic substance (RhB) under light irradiation, showcasing effective physical and chemical self-cleaning abilities. After exposure to ultraviolet light, the coating can decompose oleic acid and restore its initial superhydrophobic state. Further investigation into the mechanism of photocatalytic degradation reveals that the unique heterojunction structure of the porous ZT significantly enhances its photocatalytic activity. The porous H-ZTP applied onto stainless steel mesh shows excellent flux (40,000 L·hm) and efficiency (99 %) for oil-water separation. This research is significant for developing and applying self-cleaning coatings that combine physical superhydrophobic and chemical photocatalytic properties.
由于大多数超双疏涂层含有含氟材料，因此寻找环保替代品至关重要。近年来，研究人员致力于将环保型光催化材料集成到超疏水涂层中，以有效降解有机污染物。我们通过溶剂热法、溶胶 - 凝胶法和煅烧法相结合，成功设计了一种多孔ZrO@TiO（多孔ZT）光催化剂。用聚二甲基硅氧烷（PDMS）对多孔ZT进行改性，制备出一种ZrO@TiO@PDMS（多孔ZTP）悬浮液。然后将ZTP悬浮液喷涂到各种基材上，并在400℃下加热2分钟，制备出多孔ZrO@TiO@PDMS（多孔H-ZTP）复合涂层。多孔H-ZTP涂层表现出极低的表面能（2.37 mN/m），使其能够防止日常生活中遇到的各种液体污染，同时展现出优异的超疏水性能（WCA>160°，SA<2°）。此外，它在光照下能分解有机物质（RhB），展现出有效的物理和化学自清洁能力。在紫外光照射后，涂层能分解油酸并恢复其初始超疏水状态。对光催化降解机理的进一步研究表明，多孔ZT独特的异质结结构显著增强了其光催化活性。应用于不锈钢网的多孔H-ZTP在油水分离方面表现出优异的通量（40,000 L·hm）和效率（99%）。这项研究对于开发和应用兼具物理超疏水和化学光催化性能的自清洁涂层具有重要意义。
