Calcium carbonate micro-nano material with structure of multilayered shell and multistage compound pores
A multi-layer shell, composite hole technology, applied in calcium carbonate/strontium/barium, nanotechnology for materials and surface science, nanotechnology, etc., to achieve the effect of simple operation, good application prospects, and environmental friendliness
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Embodiment 1
[0012] The first is the preparation of the carbon sphere template: Dissolve 4g of glucose in 35mL of deionized water, stir and dissolve, transfer to a 50mL polytetrafluoroethylene reactor, heat up to 180°C at a rate of 2°C / min, and Keep it for 8 hours, wash the product by centrifugation after cooling, and dry it at 80°C for later use; then dissolve 0.088g of calcium acetate in deionized water, add 0.01g of carbon sphere template under stirring, continue to stir for 5 minutes, and then ultrasonicate for 15 minutes to assist in the dispersion of carbon spheres. The resulting suspension was kept in a water bath at 40°C for 6 hours, then centrifuged and washed to remove as much calcium acetate as possible, and dried overnight at 80°C; the template was removed by calcination, and the carbon spheres adsorbed calcium acetate were heated at 1°C in an air atmosphere. Raise the temperature to 450°C at a rate of 1 / min, keep at this temperature for 2 hours, and cool naturally to obtain cal...
Embodiment 2
[0014] The first is the preparation of the carbon sphere template: Dissolve 4g of glucose in 35mL of deionized water, stir and dissolve, transfer to a 50mL polytetrafluoroethylene reactor, heat up to 180°C at a rate of 2°C / min, and Keep it for 8 hours, wash the product by centrifugation after cooling, and dry it at 80°C for later use; then dissolve 0.771g of calcium lactate in deionized water, add 0.05g of carbon sphere template under stirring, continue to stir for 2 minutes, and then ultrasonicate for 20 minutes to assist the dispersion of carbon spheres. The resulting suspension was left standing at a constant temperature in a water bath at 50°C for 6 hours, then centrifuged and washed to remove as much calcium lactate as possible, and dried at 80°C overnight; calcined to remove the template, and the carbon spheres adsorbed calcium lactate were placed in an air atmosphere at 1°C Raise the temperature to 500°C at a rate of 1 / min, keep at this temperature for 2 hours, and cool ...
Embodiment 3
[0016] The first is the preparation of the carbon sphere template: Dissolve 4g of glucose in 35mL of deionized water, stir and dissolve, transfer to a 50mL polytetrafluoroethylene reactor, heat up to 180°C at a rate of 2°C / min, and Keep it for 8 hours, wash the product by centrifugation after cooling, and dry it at 80°C for later use; then dissolve 2.242g of calcium gluconate in deionized water, add 0.1g of carbon sphere template under stirring, continue to stir for 10 minutes, and then ultrasonicate for 10 minutes to assist in the dispersion of carbon spheres. Put the obtained suspension in a water bath at 30°C for 8 hours at a constant temperature, then centrifuge and wash away as much calcium gluconate as possible, and dry at 80°C overnight; calcinate to remove the template, and place the carbon spheres adsorbed with calcium gluconate in an air atmosphere. Raise the temperature to 470°C at a rate of 1°C / min, keep at this temperature for 2 hours, and cool naturally to obtain ...
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