A kind of ultra-high water absorption titanium dioxide foam material and preparation method thereof
A technology of titanium dioxide and foam materials, applied in chemical instruments and methods, botanical equipment and methods, separation methods, etc., can solve problems such as the reduction of specific surface area and pore volume, and the difficulty of antibacterial adsorption materials
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Embodiment 1
[0046] Solid phase sintering Cs x Ti 2-x / 4 □ x / 4 o 4 (x = 0.7) (□ represents Ti vacancies), take Cs 2 CO 3 and TiO 2 (The molar ratio is 1:5.3) Grind evenly, and place in a muffle furnace at a temperature of 800°C for 20 hours. will get Cs x Ti 2-x / 4 □ x / 4 o 4 (x = 0.7) Take 20g of the powder and disperse it in 1M HCl solution (1L), exchange hydrogen ion for 24h, change the acid solution three times in the middle, wash with suction, and dry at 60°C to obtain the corresponding protonated phase. Using the principle of acid-base neutralization, disperse 10g of the protonated phase in 1L of ethylamine (1mmol / L), stir at room temperature for one week, and obtain the stripped highly active titanium oxide nanosheet stripping solution;
[0047] Stir and dissolve 1 g of polyvinyl alcohol in 100 mL, cool to 40°C; add dropwise 5 g of partially neutralized acrylic acid (neutralization ratio 70 %), and add 40 mg of cross-linking agent N,N-methylenebispropylene Amide, after ful...
Embodiment 2
[0050] Solid phase sintering K 0.8 Ti 1.73 Li 0.27 o 4 , take the molar ratio K 2 CO 3 , Li 2 CO 3 and TiO 2 Grind evenly, and place in a muffle furnace at a temperature of 900 degrees Celsius for 24 hours. will get K 0.8 Ti 1.73 Li 0.27 o 4 The powder (40 g) was dispersed in 2M HCl solution (1L), hydrogen ion was exchanged for 24 hours, and the acid solution was changed three times in the middle, filtered and washed, and dried at 60°C to obtain the corresponding protonated phase. Using the principle of acid-base neutralization, disperse 20g of the protonated phase in 1L of tetrabutylammonium hydroxide (4mmol / L), stir at room temperature for one week, and obtain the stripped highly active titanium oxide nanosheet stripping solution;
[0051] Stir and dissolve 5g sodium carboxymethylcellulose in 100 mL, cool to 40°C; add 10 g of partially neutralized acrylic acid (neutralization ratio 70%) and 4 g of acrylamide dropwise, and add 60 mg of cross-linking agent N, N-me...
Embodiment 3
[0054] Solid phase sintered Na 2 Ti 4 o 9 , take the molar ratio Na 2 CO 3 and TiO 2 Grind evenly, and place in a muffle furnace at a temperature of 700 degrees Celsius for 16 hours. will get Na 2 Ti 4 o 9 Powder (10g) dispersed in 0.5M HNO 3 In the solution (1L), the hydrogen ion was exchanged for 12 hours, and the acid solution was changed three times in the middle, filtered and washed, and dried at 60°C to obtain the corresponding protonated phase. Disperse 5g of the protonated phase in 1L of aniline (1mmol / L), stir at room temperature for 4 days, and obtain the stripped highly active titanium oxide nanosheet stripping solution;
[0055]Stir and dissolve 2g of carboxy chitosan in 100 mL, cool to 40°C; add 8g of partially neutralized acrylic acid (neutralization ratio 70%) and 4g of acrylamide dropwise, and add 50 mg of crosslinking agent 2,2, 2-tris(acryloyloxymethyl)ethanol, after fully stirring and mixing, then add 50 mg initiator water-soluble potassium persul...
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