Method for preparing high-purity nano-silicon particles from industrial silica fume
A technology of nano-silicon and industrial silicon, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of low purity and large particle size of nano-silicon particles, reduce environmental pollution, improve economic benefits of enterprises, improve The effect of the production environment
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Embodiment 1
[0020] Such as figure 1 As shown, the method for preparing high-purity nano-silicon particles from industrial silica fume, the specific steps are as follows:
[0021] (1) First, clean the surface of the captured industrial silica fume (add the industrial silica fume to the NaOH solution with a concentration of 0.5wt% according to the liquid-solid ratio of 6:1mL / g, and stir it with a mechanical stirring device. Filter and wash after 60 minutes; then add it into the HCl solution with a concentration of 1wt% according to the liquid-solid ratio of 6:1mL / g, stir with a mechanical stirring device, filter and wash after 60 minutes), remove the silica fume surface attachments and dry ; The captured industrial silica fume comes from the soot generated during the preparation of industrial silicon particles from industrial silicon blocks;
[0022] (2) Then set the high-speed rotation speed to 1500 rpm, the low-speed rotation speed to 800 / min, and automatically switch to the high-energy ...
Embodiment 2
[0028] Such as figure 1 As shown, the method for preparing high-purity nano-silicon particles from industrial silica fume, the specific steps are as follows:
[0029] (1) First, clean the surface of the captured industrial silica fume (add the industrial silica fume to the NaOH solution with a concentration of 0.5wt% according to the liquid-solid ratio of 6:1mL / g, and stir it with a mechanical stirring device. Filter and wash after 30 minutes; then add it into the HCl solution with a concentration of 1wt% according to the liquid-solid ratio of 6:1mL / g, stir with a mechanical stirring device, filter and wash after 30 minutes), remove the silica fume surface attachments and dry ; The captured industrial silica fume comes from the soot generated during the preparation of industrial silicon particles from industrial silicon blocks;
[0030] (2) Then set the high-speed rotation speed to 1500 rpm, the low-speed rotation speed to 800 / min, and automatically switch to the high-energy ...
Embodiment 3
[0036] Such as figure 1 As shown, the method for preparing high-purity nano-silicon particles from industrial silica fume, the specific steps are as follows:
[0037] (1) First, clean the surface of the captured industrial silica fume (add the industrial silica fume to the NaOH solution with a concentration of 0.5wt% according to the liquid-solid ratio of 6:1mL / g, and stir it with a mechanical stirring device. Filter and wash after 30 minutes; then add it into the HCl solution with a concentration of 1wt% according to the liquid-solid ratio of 6:1mL / g, stir with a mechanical stirring device, filter and wash after 30 minutes), remove the silica fume surface attachments and dry ; The captured industrial silica fume comes from the soot generated during the preparation of industrial silicon particles from industrial silicon blocks;
[0038] (2) Then set the high-speed rotation speed to 1000 rpm, the low-speed rotation speed to 600 / min, and automatically switch to the high-energy ...
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