Preparation method of conductive mesoporous nano-titanium dioxide
A nano-titanium dioxide and mesoporous technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of low discharge rate and high irreversible capacity
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Embodiment 1
[0031] A. Add desalted water to the metatitanic acid in the salt treatment reactor to make slurry to control TiO 2 Concentration is 350g / L, adding concentration is 30-40% ammonium carbonate solution 5% (relative to metatitanic acid quality, NH 3 / TiO 2 ), stirred for 1 hour, vacuum filtered, and the filter cake was calcined in a resistance furnace. The calcined temperature was controlled to be 300° C., and the calcined time was 5 hours. pink;
[0032] B, adding calcined titanium dioxide powder into desalted water slurry, then adding 0.2% (SiO 2 / TiO 2 ) sodium silicate solution (50g±5g / L), control the slurry concentration TiO 2 600g / L, 97% of the particles are ground and dispersed by the grinder until the particle size is less than 0.5μm;
[0033] C. Dilute the dispersed slurry in the above step B to TiO in the coating tank with desalted water 2 350g / L, heat up to 60°C, add 0.2% sodium hexametaphosphate (relative to the slurry quality), stir evenly, add 15% tin sulfate s...
Embodiment 2
[0035] A. Add desalted water to the metatitanic acid in the salt treatment reactor to make slurry to control TiO 2 Concentration is 400g / L, adding concentration is 40% ammonium carbonate solution 10%, stir 1.5h, vacuum filter, and filter cake is calcined in electric resistance furnace, and the temperature of controlling calcining is 500 ℃, and the time of calcining is 4h, then Pulverize with a universal pulverizer to a 325-mesh sieve of less than 0.1%, to obtain calcined titanium dioxide powder;
[0036] B, adding calcined titanium dioxide powder into desalted water slurry, then adding 0.2% (SiO 2 / TiO 2 ) sodium silicate solution (50g±5g / L), control the slurry concentration TiO 2 700g / L, 97% of the particles are ground and dispersed by the grinder until the particle size is less than 0.5μm;
[0037] C. Dilute the dispersed slurry in the above step B to TiO in the coating tank with desalted water 2 400g / L, heat up to 70°C, add 0.2% sodium hexametaphosphate, stir evenly, ad...
Embodiment 3
[0039] A. Add desalted water to the metatitanic acid in the salt treatment reactor to make slurry to control TiO 2 The concentration is 365g / L, adding 6% ammonium carbonate solution with a concentration of 35%, stirring for 1.2h, vacuum filtration, and the filter cake is calcined in a resistance furnace. Then pulverize with a universal pulverizer until the residue on a 325 mesh sieve is less than 0.1%, to obtain calcined titanium dioxide powder;
[0040] B, adding calcined titanium dioxide powder into desalted water slurry, then adding 0.2% (SiO 2 / TiO 2 ) sodium silicate solution (50g±5g / L), control the slurry concentration TiO 2 650g / L, 97% of the particles are ground and dispersed by the grinder until the particle size is less than 0.5μm;
[0041] C. Dilute the dispersed slurry in the above step B to TiO in the coating tank with desalted water 2 365g / L, heat up to 65°C, add 0.2% sodium hexametaphosphate, stir evenly, add 15% tin sulfate solution (concentration 250±5g / L)...
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