Hollow carbon sphere and preparation method and application thereof
A technology of hollow carbon spheres and polymerization reaction, applied in the direction of nano-carbon, etc., can solve the problems of unevenness, large wall thickness of hollow carbon spheres, cumbersome steps, etc., and achieve the effect of large specific surface area, large pore volume, and controllable wall thickness
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[0037] Example 1
[0038] Mix the resin monomer-resorcinol, ammonia, deionized water, absolute ethanol, and surfactant-cetyltrimethylammonium bromide (CTAB), and mix and stir uniformly to prepare solution A; add ethyl orthosilicate Ester (TEOS) was added to solution A to prepare solution B. Keep the temperature of solution B at 40℃, and hydrolyze ethyl orthosilicate for 1 hour to prepare silica suspension; suspend it to silica at a dropping rate of 1ml / min Add formaldehyde solution to the liquid and carry out the first-stage polymerization reaction at 35°C for 24h; then transfer the solution to the reactor, keeping the solution temperature at 80°C, and carry out the second-stage polymerization: hydrothermal reaction for 30h, preparation 2 Silica-resin composite balls; after washing, filtering and drying the silica-resin composite balls, they are transferred to a tube furnace, heated to 600°C in a nitrogen atmosphere, and kept for 20 hours to prepare silica-carbon composite balls ...
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[0040] Examples 2-10
[0041] Examples 2-10, the preparation process is the same as that of Example 1, except that the molar concentration of resin monomer, the mass fraction of orthosilicate, the mass fraction of surfactant, the volume ratio of alcohol and water are different, as shown in Table 1. .
[0042] The hollow carbon ball obtained in Example 2 is marked as MF-2.2-20, and the SEM image (a) and TEM image (b) are as follows figure 2 It can be seen that the particle size of the hollow carbon spheres is basically the same, about 250nm, the wall thickness is about 15nm, and the spheres are connected to each other. This is further verified in the box marked in the TEM picture. .
[0043] The hollow carbon ball obtained in Example 3 is marked as MF-1.1-20, the SEM image (a) and TEM image (b) are as follows image 3 , It can be seen that the particle size of the hollow carbon spheres is basically the same, about 250nm, the wall thickness is about 30nm, and the spheres are connecte...
Example
[0046] Examples 11-20
[0047] In Examples 11-20, the preparation process is the same as that in Example 1, except that the hydrolysis temperature and time of ethyl orthosilicate, the polymerization temperature and time, and the calcination temperature and time are different, as shown in Table 2.
[0048] Table 2.
[0049]
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