Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Zhejiang Sci-Tech University , Hangzhou 310018, China.
ACS Appl Mater Interfaces. 2017 Jul 19;9(28):23974-23982. doi: 10.1021/acsami.7b06402. Epub 2017 Jul 5.
We describe a highly effective bubble-propelled nanomotor for the photocatalytic decomposition of organic pollutants in water. Two different tubular TiO nanomotor systems are presented: one with Pt nanoparticles decorated on the inner surface and the other with Pt nanoparticles decorated on the outer surface. This is the first time that we have observed the autonomous movement of a tubular nanomotor without the aid of any surfactant, as well as a tubular nanomotor externally decorated with Pt propelled by oxygen bubbles. The synergy between the Pt nanoparticles and the superhydrophilic wetting behavior of the TiO nanotubes endows the two nanomotor systems with high speed at very low HO fuel concentrations without the addition of any surfactant. The efficient photodecomposition of rhodamine B demonstrates the intermixing and photocatalytic ability of the two nanomotor systems, which opens new avenues for the development of multifunctional bubble-propelled micro/nanomotors with myriad practical applications.
我们描述了一种用于水中有机污染物光催化分解的高效气泡推进纳米马达。提出了两种不同的管状 TiO2 纳米马达系统：一种是在内部表面上装饰有 Pt 纳米粒子，另一种是在外部表面上装饰有 Pt 纳米粒子。这是我们第一次观察到没有任何表面活性剂辅助的管状纳米马达的自主运动，以及由氧气泡推动的外部装饰有 Pt 的管状纳米马达。Pt 纳米粒子与 TiO2 纳米管的超亲水润湿行为之间的协同作用使这两种纳米马达系统在非常低的 HO 燃料浓度下以非常低的速度运行，而无需添加任何表面活性剂。罗丹明 B 的有效光解证明了两种纳米马达系统的混合和光催化能力，这为开发具有多种实际应用的多功能气泡推进微/纳米马达开辟了新途径。
