A smart nano-V2O5/ODA-coated mesh for a co-responsive photo-induced wettability transition and ROS generation for in situ water purification

作者：Qu, Ruixiang; Zhang, Weifeng; Li, Xiangyu; Liu, Yanan; Shih, Tzungyu; Wei, Yen; Feng, Lin^*

来源：Journal of Materials Chemistry A, 2018, 6(37): 18003-18009.

DOI：10.1039/c8ta07094f

• REVERSIBLE WETTABILITY
• OIL/WATER EMULSIONS
• OXIDE NANOTUBES
• SEPARATION
• SURFACE
• OIL
• COATINGS
• FILM
• V2O5
• ZNO

A co-responsive material is successfully fabricated by coating nano-vanadium pentoxide/octadecylamine (nano-V2O5/ODA) onto a copper mesh via a hydrothermal reaction. Co-response means that a material can realize a multi-performance transition under one environmental stimulus. Nano-V2O5 provides the material with a photo-induced wettability transition and reactive oxygen species (ROS) generation properties, while ODA produces a superhydrophobic material in its initial state. As a result, this material can achieve a reversible superhydrophobic/superhydrophilic transition under 254 nm ultraviolet (UV) light. By combining the wettability transition with ROS generation properties, a smart mesh can realize in situ photo-controlled water purification, i.e., the controllable and simultaneous removal of the oil and soluble contaminants. An extra V2O5-coated mesh is used as an auxiliary mesh to improve the oil removal and ROS generation efficiencies. Moreover, the mesh exhibits satisfactory reusability and physical/chemical stability, which is more promising for practical applications such as remote controlled water purification, timed discharge of sewage and microfluidic valves.

• 出版日期2018-10-7
• 单位清华大学