Synthesis of CdS multipods from cadmium xanthate in ethylenediamine solution--颗粒学报PARTICUOLOGY

Han, Q., Zhao, J., Wu, L., Zhu, J., & Wang, X. (2015). Synthesis of CdS multipods from cadmium xanthate in ethylenediamine solution. Particuology, 19, 45–52. https://doi.org/10.1016/j.partic.2014.04.009

Synthesis of CdS multipods from cadmium xanthate in ethylenediamine solution

Qiaofeng Han^*, Jin Zhao, Lei Wu, Junwu Zhu, Xin Wang

Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China

10.1016/j.partic.2014.04.009

Volume 19, April 2015, Pages 45-52

Received 17 December 2013, Revised 28 March 2014, Accepted 3 April 2014, Available online 22 July 2014.

E-mail: hanqiaofeng@njust.edu.cn; hanqiaofeng@tom.com

Highlights

• CdS multipods were synthesized by using Cd xanthate as single precursor in EDA.

• A synergistic effect between temperature and concentration determined the growth of CdS pods.

• EDA and xanthate ligands acted as co-capping agents in the growth of CdS multipods.

Abstract

CdS nanocrystals of various shapes were synthesized by using cadmium ethyldithiocarbonatio (xanthate) as a single precursor under solvothermal condition. The reaction temperature, cadmium concentration, and solvents determine the CdS morphology. Multipodal CdS structures of different fractions of all particles were obtained at temperatures ranging from 100 to 180 °C with the corresponding precursor concentrations in ethylenediamine (EDA) solution. This approach is different from that reported in the literature, where EDA is regarded as a solvent favorable to the formation of CdS nanorods instead of pods. Uniform CdS multipods were prepared at 160 °C with 1.0 g of cadmium xanthate. The formation of CdS multipods in EDA solution may be attributed to a synergistic effect between the reaction temperature and Cd concentration, i.e., thermodynamically and kinetically controlled growth of the CdS wurtzite (WZ) and zinc blende (ZB) phases, as confirmed by the structural characterization of the component CdS crystals. EDA and xanthate ligands act as co-assisted capping agents in the growth of CdS multipods. When using N,N-dimethylformamide (DMF) and ethylene glycol (EG) as solvents, the CdS appears as triangular particles and flower-like microspheres assembled by polyhedrons, respectively.

Graphical abstract

Keywords

Nanostructured materials; Chemical synthesis; Microstructure; Transmission electron microscopy

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