Synthesis of hierarchical hollow spherical CdS nanostructures by microwave hydrothermal process
(1. School of Materials Science and Engineering, Tongji University, Shanghai 201804, China;
2. Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi’an 710021, China;
3. School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)
2. Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi’an 710021, China;
3. School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)
Abstract: Hierarchical hollow spherical CdS nanostructures were synthesized via a simple microwave hydrothermal(M-H) process using CdCl2·H2O and Na2S2O3·5H2O as raw materials and adding ethylenediaminetetraacetic acid (EDTA) as template. The obtained products were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), energy dispersive spectroscopy (EDS), and high-resolution transmission electron microscopy (HRTEM). Ultraviolet-visible (UV-vis) spectroscopy was used to study the optical properties of CdS. The results demonstrate that the hierarchical hollow spherical CdS with a diameter range of 400−600 nm is self-assembled by nanoparticles of 30 nm and in a wurtzite structure. EDTA and microwave play an important role on the formation of the hollow hierarchical morphology. The effect of the microwave and possible growth mechanism were discussed. UV-vis spectroscopy indicates that the CdS crystallites could be used as a potential blue light emitting material.
Key words: CdS; microwave hydrothermal method; hierarchical hollow sphere; optical property