Spherical cadmium sulfide was prepared by hydrothermal reaction with deionized water served as solvent,polyvi-nylpyrrolidone(PVP K30)as surface modifier,thiourea(TU)as sulfur source,and cadmium nitrate tetrahydrate as cad-mium source.The influence of reactant concentration on the morphology and color properties of cadmium sulfide was inves-tigated,the formation mechanism of spherical morphology was elucidated.The chromaticity parameters were tested,the phase composition was analyzed,and the micromorphology was observed of cadmium sulfide pigment.The results showed that when the concentration of cadmium source and sulfur source was as high as 0.1 mol/L and the concentration of PVP K30 was 0.01 mol/L,the spherical cadmium sulfide with good sphericity could still be obtained.The performance parame-ters of cadmium sulfide prepared at high concentrations are as follows:cadmium sulfide with hexagonal wurtzite structure,chromaticity parameters L*=85.22,a*=4.27,b*=80.34,generatingabright lemon-yellow color.The key to the prepa-ration of spherical cadmium sulfide at high concentrations is to obtain a uniform reactant solution and the sustained release of sulfur ions.This study greatly improved the yield of spherical cadmium sulfide,which has important reference signifi-cance for the preparation of spherical zirconium silicate encapsulated cadmium sulfide yellow pigment.
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维普
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