Influence of EDTA{sup 2-} on the hydrothermal synthesis of CdTe nanocrystallites

Journal Article · Thu Dec 15 00:00:00 EST 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.10.018· OSTI ID:21612827

Haibo, Gong ^[1]; Yongzhong, Wu ^[1]; Bingqiang, Cao; Hongyan, Xu ^[2]; Xiangang, Xu ^[1]

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1. Center of Bio and Micro/nano Functional Materials, State Key Lab of Crystal Materials, Shandong University, Jinan 250100 (China)
2. School of Materials Science and Engineering, University of Jinan, Jinan 250022 (China)

Transformation from Te nanorods to CdTe nanoparticles was achieved with the assistance of EDTA as a ligand under hydrothermal conditions. Experimental results showed that at the beginning of reaction Te nucleated and grew into nanorods. With the proceeding of reaction, CdTe nucleus began to emerge on the surface, especially on the tips of Te nanorods. Finally, nearly monodispersed hexagonal CdTe nanoparticles with diameters of about 200 nm were obtained. The effects of EDTA on the morphology and formation of CdTe nanoparticles were discussed in consideration of the strong ligand-effect of EDTA, which greatly decreased the concentration of Cd{sup 2+}. Furthermore, the possible formation process of CdTe nanoparticles from Te nanorods was further proposed. The crystal structure and morphology of the products were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). - Graphical Abstract: Firstly, Te nucleated and grew into nanorods in the presence of EDTA{sup 2-}. Then CdTe nucleus began to emerge on Te nanorods and finally monodispersed CdTe nanoparticles were obtained. Highlights: Black-Right-Pointing-Pointer EDTA serves as a strong ligand with Cd{sup 2+}. Black-Right-Pointing-Pointer The existence of EDTA constrains the nucleation of CdTe and promotes the formation of Te nanorods. Black-Right-Pointing-Pointer With the proceeding of reaction, CdTe nucleus began to emerge on the surface, especially on the tips of Te nanorods. Black-Right-Pointing-Pointer Nearly monodispersed hexagonal CdTe nanoparticles with diameters of about 200 nm were finally obtained.

• OSTI ID: 21612827
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 12; Other Information: DOI: 10.1016/j.jssc.2011.10.018; PII: S0022-4596(11)00559-7; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CADMIUM
CADMIUM IONS
CADMIUM TELLURIDES
CRYSTAL STRUCTURE
EDTA
HYDROTHERMAL SYNTHESIS
LIGANDS
MORPHOLOGY
NANOSTRUCTURES
NUCLEATION
NUCLEI
PARTICLES
SCANNING ELECTRON MICROSCOPY
SEMICONDUCTOR MATERIALS
SURFACES
TELLURIUM
X-RAY DIFFRACTION
AMINO ACIDS
CADMIUM COMPOUNDS
CARBOXYLIC ACIDS
CHALCOGENIDES
CHARGED PARTICLES
CHELATING AGENTS
COHERENT SCATTERING
DIFFRACTION
ELECTRON MICROSCOPY
ELEMENTS
IONS
MATERIALS
METALS
MICROSCOPY
ORGANIC ACIDS
ORGANIC COMPOUNDS
SCATTERING
SEMIMETALS
SYNTHESIS
TELLURIDES
TELLURIUM COMPOUNDS