Laser-induced convenient fabrication of CdS nanocages with super adsorption capability for methyl blue solution**Project supported by the National Natural Science Foundation of China (Grant Nos. 11575102 and 11105085) and the Fundamental Research Funds of Shandong University, China (Grant No. 2015JC007).

Abstract

We report on the successful synthesis of cadmium sulfide (CdS) nanocages by laser ablation of bulk Cd target in thioacetamide (TAA) solution. The CdS nanocages exhibit obvious interior hollow spaces and distinctive porous-shell structures. After laser ablation of Cd target in liquid condition, the unique structure should be attributed to the initial formation of Cd micro-gas bubble via a model of micro-explosive boiling model. Surprisingly, the obtained CdS nanocages can provide a super adsorption of methyl blue (MB) solution. The maximum adsorption capacity reaches up to 11813.3 mg/g, which is much higher than that reported in many previous researches. Without using any complicated stabilizers or soft directing agents, the pure CdS nanocages fabricated by laser ablation will serve as advanced absorbents in further research.