Underwater superoleophobicity of a robust rough titanium dioxide surface formed on titanium substrate by acid treatment

作者：Nishimoto Shunsuke^*; Ota Misaki; Kameshima Yoshikazu; Miyake Michihiro

来源：Colloids and Surfaces A: Physicochemical and Engineering Aspects , 2015, 464: 33-40.

DOI：10.1016/j.colsurfa.2014.10.009

• TiO2 photocatalyst
• Underwater superoleophobicity
• Superhydrophilicity
• Oil-water separation

A robust rough titanium dioxide (TiO2) surface was prepared by acid treatment of a Ti plate and mesh. By ultraviolet (UV) irradiation, the surface exhibited superhydrophilicity and superoleophilicity in air and underwater superoleophobicity. Due to the rough surface, the underwater superoleophobicity was observed, even after dark storage for 1 week under the ambient atmosphere. The robust rough TiO2 mesh with a pore size of approximately 150 mu m functioned as a high speed oil/water separation filter with high mechanical durability and self-cleaning property.

• 出版日期2015-1-5