Li Yong, Xie Jiyang, Guo Changjin, Wang Jian, Liu Huan, Hu Wanbiao
Key Laboratory of LCR Materials and Devices of Yunnan Province, School of Materials Science and Engineering, Yunnan University Kunming 650091 P. R. China.
School of Physics and Astronomy, Yunnan University Kunming 650091 P. R. China
RSC Adv. 2020 Mar 17;10(19):11182-11187. doi: 10.1039/d0ra00381f. eCollection 2020 Mar 16.
Sodium titanate nanowire-assembled microspheres on titanium mesh have been synthesized through controlling an over the surface acidification and hydrothermal process in terms of a proposed "nucleation-cum-growth" solution chemistry strategy. These directly grown microspheres crystallize in an orthorhombic lepidocrocite layered structure of sodium titanate with the composition of NaTi□O (□ ∼ vacancy) determined by the XRD, Raman and SEM-EDX techniques. An individual microsphere has a uniform size of around 10 microns while the constituent nanowires have a diameter of 100 nm growing along the [110] orientation. Owing to the specially well-defined hierarchical structure and robust interfaces, these titanate nanowire-assembled microspheres, after 2,2,3,3,4,4,5,5-octafluoro-1-pentanol (OFP) surface modification, could achieve superhydrophobicity. This work demonstrates an "nucleation-cum-growth" synthesis strategy and facile functionalization towards superhydrophobicity for oil-water separation, which might extend to a broad variety of oxide nanowire systems to fabricate well-defined structures for wettability tailoring and multi-functional applications.
通过控制基于“成核兼生长”溶液化学策略的表面酸化和水热过程，在钛网上合成了钛酸钠纳米线组装微球。这些直接生长的微球结晶为钛酸钠的正交纤铁矿层状结构，其组成NaTi□O（□ ∼ 空位）由XRD、拉曼和SEM-EDX技术确定。单个微球的尺寸均匀，约为10微米，而组成的纳米线直径为100纳米，沿[110]方向生长。由于具有特别明确的分级结构和坚固的界面，这些钛酸盐纳米线组装微球在经过2,2,3,3,4,4,5,5-八氟-1-戊醇（OFP）表面改性后，可实现超疏水性。这项工作展示了一种“成核兼生长”合成策略以及实现超疏水性用于油水分离的简便功能化方法，这可能扩展到广泛的氧化物纳米线系统，以制造用于润湿性调控和多功能应用的明确结构。
