Zhu Jundong, Yang Fan, Jiang Chongwen, Li Zhonghua, Zhou Yanfang, Li Xin
Hunan Provincial Key Laboratory of Carbon Neutrality and Intelligent Energy, School of Resources and Environment, Hunan University of Technology and Business, Hunan 410205, China.
Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, College of Chemistry and Chemical Engineering, Central South University, Hunan 410083, China.
ACS Appl Mater Interfaces. 2025 May 21;17(20):30327-30339. doi: 10.1021/acsami.5c04476. Epub 2025 May 6.
Frequent oil spills and the discharge of oily wastewater pose serious threats to the environment, ecosystems, and humans. Herein, a multifunctional superhydrophobic sponge was successfully prepared through the in situ growth of Ag-MnO nanoparticles assisted by polydopamine rapid deposition and subsequent hydrophobic silicon modification. Owing to the synergistic effects of the hierarchical micro/nanostructure and methyl-terminated surface modification, the obtained superhydrophobic sponge has a water contact angle (WCA) of 156.5°, demonstrating excellent chemical stability and structural durability under harsh environmental media and mechanical damage. For oil-water separation, the adsorption capacity of modified sponge for various oils ranges from 58.2 to 132.6 times its own weight and great separation efficiency up to 98.38%. Through the photothermal conversion effect of Ag-MnO nanocomposite, the surface temperature of the material can reach 64.1 °C under simulated radiation, achieving rapid adsorption and recovery of high-viscosity oil. Additionally, the immobilization of silver nanoparticles within the sponge skeleton effectively inhibits the growth of and , exhibiting antibacterial properties that facilitate the elimination of bacteria in organically contaminated water sources. Therefore, the multifunctional superhydrophobic sponge in this study provides high potential and efficient application for efficient oil-water separation, rapid crude oil recovery, and antibacterial pollution of water.
频繁的石油泄漏和含油废水排放对环境、生态系统和人类构成了严重威胁。在此，通过聚多巴胺快速沉积辅助原位生长Ag-MnO纳米颗粒并随后进行疏水硅改性，成功制备了一种多功能超疏水海绵。由于分级微/纳米结构和甲基封端表面改性的协同作用，所制备的超疏水海绵的水接触角（WCA）为156.5°，在苛刻的环境介质和机械损伤下表现出优异的化学稳定性和结构耐久性。对于油水分离，改性海绵对各种油的吸附容量为其自身重量的58.2至132.6倍，分离效率高达98.38%。通过Ag-MnO纳米复合材料的光热转换效应，在模拟辐射下材料表面温度可达到64.1℃，实现高粘度油的快速吸附和回收。此外，银纳米颗粒固定在海绵骨架内有效抑制了 和 的生长，表现出抗菌性能，有助于消除有机污染水源中的细菌。因此，本研究中的多功能超疏水海绵在高效油水分离、快速原油回收和水的抗菌污染处理方面具有很高的应用潜力和效率。
