Sea-urchin-shaped hydroxyl alumina sphere and preparation method thereof
A technology of aluminum oxyhydroxide and sea urchin shape, which is applied in the field of preparation of aluminum oxyhydroxide functional materials, achieving novel appearance, simple preparation process and good application prospects
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Embodiment 1
[0028] 1.1 Add 0.2 mL of deionized water to 20 mL of absolute ethanol, add 0.2 μL of thioglycolic acid dropwise to the mixed solution of ethanol and water under stirring conditions, and finally stir well at room temperature to obtain a uniform transparent solution;
[0029] 1.2 Add 0.058 g of aluminum isopropoxide to the solution prepared in Example 1.1, and stir well at room temperature to obtain a uniform white emulsion;
[0030] 1.3 The emulsion obtained in Example 1.2 was transferred to a reaction kettle, and reacted at 220 °C for 20 h. After the reaction was completed, aluminum oxyhydroxide microspheres were obtained by centrifugal separation and washing.
[0031] figure 1 Scanning electron micrographs of the obtained samples, figure 2 It is a transmission electron microscope photo of the obtained sample. As can be seen from the figure, the product is spherical, with a fluffy structure on the surface of the ball, similar to the shape of a sea urchin, and the particle s...
Embodiment 2
[0033] 2.1 Add 0.2 mL of deionized water to 20 mL of absolute ethanol, add 0.2 μL of thioglycolic acid dropwise to the mixed solution of ethanol and water under stirring conditions, and stir well to obtain a uniform and transparent solution ;
[0034] 2.2 Add 0.058 g of aluminum isopropoxide to the solution prepared in Example 2.1, and stir well at room temperature to obtain a uniform white emulsion;
[0035] 2.3 Transfer the emulsion obtained in Example 2.2 to a reaction kettle, and react at 300°C for 20 h. After the reaction is completed, aluminum oxyhydroxide microspheres are obtained by centrifugation and washing, with the same morphology as figure 1 , and its particle size is 400-550 nm.
Embodiment 3
[0037] 3.1 Add 0.2 mL of deionized water to 20 mL of absolute ethanol, add 0.2 μL of thioglycolic acid dropwise to the mixed solution of ethanol and water under stirring conditions, and finally stir well at room temperature to obtain a uniform transparent solution;
[0038] 3.2 Add 0.248 g of aluminum isopropoxide to the solution prepared in Example 3.1, and stir well at room temperature to obtain a uniform white emulsion;
[0039] 3.3 Transfer the emulsion obtained in Example 3.2 to a reaction kettle, and react at 200°C for 20 h. After the reaction is completed, obtain pure aluminum oxyhydroxide microspheres with the same morphology as figure 1 , and its particle size is 250-400 nm.
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