Magnetic titanium dioxide hollow ball and preparation method thereof
A titanium dioxide and hollow sphere technology is applied in the magnetic titanium dioxide hollow sphere and its preparation. Controllable thickness and easy operation
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[0029] Example 1
[0030] (1) Preparation of polystyrene template spheres with a size of 560 nm
[0031] At room temperature, 220 mL of deionized water and 26 mL of styrene were added to a three-neck flask protected by nitrogen. Under stirring conditions of 300 rpm, after stirring for 30 minutes, the temperature was raised to 70° C. in a water bath at a rate of 1° C. / min. Then, 20 mL of a potassium persulfate aqueous solution with a concentration of 30 g / L was dropped into the three-necked flask, and reacted at 70° C. for 20 hours. The reaction solution was cooled to room temperature and centrifuged, and washed twice with deionized water and ethanol to obtain polystyrene template spheres.
[0032] (2) Preparation of cobalt ferrite precursor coated polystyrene spheres
[0033] At room temperature, 80 mg template polystyrene spheres were ultrasonically dispersed in 50 mL of a mixed salt solution of cobalt nitrate and ferric chloride for 20 minutes, where the molar concentration of d...
Example Embodiment
[0038] Example 2
[0039] (1) Preparation of polystyrene template spheres with a size of 560 nm
[0040] At room temperature, 220 mL of deionized water and 26 mL of styrene were added to a three-neck flask protected by nitrogen. Under stirring conditions of 300 rpm, after stirring for 30 minutes, the temperature was raised to 70° C. in a water bath at a rate of 1° C. / min. Then, 20 mL of a potassium persulfate aqueous solution with a concentration of 30 g / L was dropped into the three-necked flask, and reacted at 70° C. for 20 hours. The reaction solution was cooled to room temperature and centrifuged, and washed twice with deionized water and ethanol to obtain polystyrene template spheres.
[0041] (2) Preparation of cobalt ferrite precursor coated polystyrene spheres
[0042] At room temperature, 80 mg template polystyrene spheres were ultrasonically dispersed in 50 mL of a mixed salt solution of cobalt nitrate and ferric chloride for 20 minutes, where the molar concentration of d...
Example Embodiment
[0047] Example 3
[0048] (1) Preparation of polystyrene template spheres with a size of 560 nm
[0049] At room temperature, 220 mL of deionized water and 26 mL of styrene were added to a three-neck flask protected by nitrogen. Under stirring conditions of 300 rpm, after stirring for 30 minutes, the temperature was raised to 70° C. in a water bath at a rate of 1° C. / min. Then, 20 mL of a potassium persulfate aqueous solution with a concentration of 30 g / L was dropped into the three-necked flask, and reacted at 70° C. for 20 hours. The reaction solution was cooled to room temperature and centrifuged, and washed twice with deionized water and ethanol to obtain polystyrene template spheres.
[0050] (2) Preparation of magnetic cobalt ferrite hollow sphere
[0051] At room temperature, 80 mg template polystyrene spheres were ultrasonically dispersed in 50 mL of a mixed salt solution of cobalt nitrate and ferric chloride for 20 minutes, where the molar concentration of divalent cobalt...
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