Multi-Phase Mass Transfer and Reaction Engineering Laboratory, School of Chemical Engineering, Sichuan University, Chengdu, 610065, China.
Nanoscale. 2018 Jul 19;10(28):13661-13672. doi: 10.1039/c8nr02581a.
In this research, a controlling mechanism of particle size on the wettability of Ag2O particles is reported, and an interesting floatable Ag2O photocatalyst with superhydrophobicity and superoleophilicity is prepared based on this mechanism. Stable superhydrophobic and superhydrophilic Ag2O without a low-surface-energy modifier can be obtained only by adjusting its particle size, and its wettability can switch mutually by changing the particle size. The wettability of Ag2O converts from superhydrophilic to hydrophobic when the average particle size is more than 1.08 μm. The operation parameters of the Ag2O crystallization process significantly influence the wettability of the Ag2O particles. The obtained superhydrophobic Ag2O floated on the water surface, and exhibited excellent photodegradation performance with various floating oils. This attractive superhydrophobic Ag2O photocatalyst is promising for practical applications, and provides a strategy for the development of functional photocatalysts and superhydrophobic materials.
本研究报道了一种控制 Ag2O 颗粒润湿性的粒径控制机制，并基于该机制制备了具有超疏水性和超亲油性的有趣的可浮性 Ag2O 光催化剂。仅通过调整其粒径，就可以获得稳定的无低表面能改性剂的超疏水和超亲水 Ag2O，并且可以通过改变粒径使其润湿性相互切换。当平均粒径大于 1.08 μm 时，Ag2O 的润湿性从超亲水转变为疏水。Ag2O 结晶过程的操作参数对 Ag2O 颗粒的润湿性有显著影响。所得的超疏水 Ag2O 漂浮在水面上，并对各种浮油表现出优异的光降解性能。这种有吸引力的超疏水 Ag2O 光催化剂具有实际应用的前景，为功能性光催化剂和超疏水材料的发展提供了一种策略。
