Effect of Cd²⁺ Concentration on the CdS Crystallites Prepared by Microwave Hydrothermal Process

Abstract:

Cadmium sulphide (CdS) crystallites were successfully prepared by a microwave hydrothermal (M–H) process using cadmium chloride (CdCl₂·H₂O) and sodium thiosulfate (Na₂S₂O₃·5H₂O) as source material with different Cd²⁺ concentration. The phase, composition, morphology and optical property of the obtained crystallites were characterized by X–ray diffraction (XRD), field–emission scanning electron microscopy (FE–SEM), transmission electron microscopy (TEM) and ultraviolet–visible spectrophotometer (UV–Vis). Results show that the crystalline structure of the prepared CdS crystallites changes regularly with the increase of Cd²⁺ concentration and the corresponding morphology of CdS crystallites transforms from tetrahedron to quasi-sphere. The quasi-spherical CdS is derived from the nanoparticles-assembly behavior. And with the increase of Cd²⁺ concentration, the decrease in CdS crystallite size is observed. Obvious blue–shift is detected in the UV–Vis absorption when Cd²⁺ concentration reaches 0.60 mol/L.

• Periodical: Key Engineering Materials (Volumes 512-515)
• Pages: 203-206
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.512-515.203
• Online since: June 2012
• Authors: Jian Feng Huang, Qin Feng Zhang, Bao Yun Hu, Li Yun Cao, Jian Peng Wu
• Keywords: Cd²⁺ Molarity, CdS, Microwave Hydrothermal, Morpholoy

References

[1] M.C. Schlamp, X.G. Peng and A.P. Alivisatos, Improved efficiencies in light emitting diodes made with CdSe (CdS) core/shell type nanocrystals and a semiconducting polymer, J. Appl. Phys. 82 (1997) 5837-5842.

DOI: 10.1063/1.366452

[2] H. Khallaf, O. Isaiah, L. Chow, Optimization of chemical bath deposited CdS thin films using nitrilotriacetic acid as a complexing agent, J. Thin Solid Films. 516 (2008) 5967-5973.

DOI: 10.1016/j.tsf.2007.10.079

[3] C. Burda, X.B. Chen, R. Narayanan, Chemistry and properties of nanocrystals of different shapes, J. Chem.Rev. 105 (2005) 1025-1102.

DOI: 10.1021/cr030063a

[4] X. Fu, L. Lin, D.B. Wang, Preparation of CdS hollow spheres using poly- (styrene-acrylic acid) latex particles as template, J. Colloids and Surfaces A. 262 (2005) 216-219.

DOI: 10.1016/j.colsurfa.2005.04.037

[5] H. Lee, H. Yang, P.H. Holloway, Functionalized CdS nanospheres and nanorods, J. Phys. B. 404 (2009) 4364-4366.

[6] D. Routkevitcha, T.L. Haslett, L. Ryana, Synthesis and resonance Raman spectroscopy of CdS nano-wire arrays, J. Chemical Physics. 210 (1996) 343-346.

DOI: 10.1016/0301-0104(96)00171-1

[7] M. Chen, L.J. Pan, J.M. Cao, Synthesis of CdS nanoplates by PAA-assisted hydrothermal approach, J. Materials Letters. 60 (2006) 3842-3845.

DOI: 10.1016/j.matlet.2006.03.125

[8] N. Gao, F. Guo, A hydrothermal method to prepare the spherical ZnS and flower-like CdS microcrystallites, J. Materials letters. 60 (2006) 3697-3700.

DOI: 10.1016/j.matlet.2006.03.072

[9] X.B. He, L. Gao, CdS hierarchical spindles: structural defects and properties, J. Materials Letters. 63 (2009) 995-997.

DOI: 10.1016/j.matlet.2009.01.081

[10] L. Zhang, Y.J. Zhu, Microwave-assisted solvothermal synthesis of ALOOH hierarchically nanostructured microspheres and their transformation to g-Al2O3 with similar morphologies, J. Phys. Chem. 112 (2008) 64-69.

DOI: 10.1021/jp805751t

[11] J.F. Huang, C.K. Xia, L.Y. Cao, Facile microwave hydrothermal synthesis of zinc oxide one-dimensional nanostructure with three-dimensional morphology, J. Materials Science and Engineering B. 150 (2008) 187-193.

DOI: 10.1016/j.mseb.2008.05.014