Abstract

A simple and versatile strategy is designed to successfully fabricate ultrafine TiO₂ nano-cages based on the rapid decomposition reaction between amphoteric hydroxide and ammonia solution by pulsed laser ablation of Ti/Al alloy in liquid. With the ammonia concentration (V_ammonia:V_water, where V is volume) increasing from 1∶10 to 1∶4, the diameter and shell thickness of quasi-spherical TiO₂ nano-cages substantially decrease from 300 and 60 nm to 9.2 and 2.8 nm, respectively. The obtained results have significant implications for obtaining insight into the properties of the TiO₂ porous nano-cages, offering the basis for further fabrication of other nano-cages.

© 2015 Chinese Laser Press

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