Preparation of stable colloidal solution of cadmium sulfide CdS using ethylenediaminetetraacetic acid |
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Authors: | N S Kozhevnikova A S Vorokh A A Rempel’ |
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Institution: | 1.Institute of Solid State Chemistry, Ural Branch,Russian Academy of Sciences,Yekaterinburg,Russia |
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Abstract: | By the method of chemical condensation a stable aqueous colloidal solution of nanoparticles of cadmium sulfide was obtained.
The solution obtained in the daylight had a bright lemon-yellow color. For the temporary stabilization of the solution was
used an organic complexone, disodium ethylenediaminetetraacetate (EDTA), that prevented coagulation of colloidal particles
up to several months at 4°C. At room temperature, the solution remained stable during a month. The structure and properties
of the disperse phase were studied by the X-ray diffraction, optical fluorescence, and electron microscopy. The solid particles
size is about 3 nm, they have a disordered close-packed structure with the space group P6mm and possess the photoluminescence
color from green to orange depending on the duration of keeping the solution. The size of coagulates was 10 nm, 100 nm, and
1 μm after keeping for 1, 2, and 4 months, respectively. |
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