A recyclable mesoporous tio with tunable surface electrical properties 2 Adsorbent and its preparation method and application
An adsorbent and mesoporous technology, which is applied in the field of preparation of mesoporous TiO2 adsorbent, can solve the problem of adsorbent damage, etc., and achieve the effect of many adsorption sites, large specific surface area, and high-efficiency adsorption capacity
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Embodiment 1
[0031] A recyclable mesoporous TiO with negative surface conductivity 2 The preparation method of adsorbent comprises the following steps:
[0032] 1) Mix 100 mL of isopropanol with 25 mL of deionized water, add 5 mL of ammonia, and stir at room temperature;
[0033] 2) adding 75mL concentration to above-mentioned solution is the isopropanol solution of bis(acetylacetonyl) diisopropyl titanate (TDAA) of 10mmol / L, continue to stir 40h with the stirring speed of 500rpm to obtain suspension, at this moment The volume ratio of isopropanol, deionized water and TDAA solution in the solution is 4:1:3, and the volume ratio of ammonia water and deionized water is 1:5;
[0034] 3) Centrifuge the obtained suspension at a speed of 8000 rpm for 10 minutes, then wash it with deionized water and isopropanol three times, then dry it at 80°C for 12 hours, and grind to obtain TiO 2 Sorbent powder.
[0035] TiO prepared in this example 2 Adsorbent, without lattice structure, belongs to amorp...
Embodiment 2
[0044] A recyclable mesoporous TiO with negative surface conductivity 2 The preparation method of adsorbent comprises the following steps:
[0045] 1) Mix 50 mL of isopropanol with 25 mL of deionized water, add 12.5 mL of ammonia water, and stir at room temperature;
[0046] 2) adding 25mL concentration to above-mentioned solution is the isopropanol solution of bis(acetylacetonyl) diisopropyl titanate (TDAA) of 10mmol / L, continue to stir 40h with the stirring speed of 500rpm to obtain suspension, at this moment The volume ratio of isopropanol, deionized water and TDAA solution in the solution is 2:1:1, and the volume ratio of ammonia water and deionized water is 1:2;
[0047] 3) Centrifuge the obtained suspension at a speed of 8000 rpm for 10 minutes, then wash it with deionized water and isopropanol three times, then dry it at 50°C for 20 hours, and grind to obtain TiO 2 Sorbent powder.
[0048] TiO prepared in this example 2 Adsorbent, without lattice structure, belongs ...
Embodiment 3
[0051] A recyclable mesoporous TiO with negative surface conductivity 2 The preparation method of adsorbent comprises the following steps:
[0052] 1) Mix 100 mL of isopropanol with 25 mL of deionized water, add 2.5 mL of ammonia water, and stir at room temperature;
[0053] 2) adding 40mL concentration to above-mentioned solution is the isopropanol solution of bis(acetylacetonyl) diisopropyl titanate (TDAA) of 10mmol / L, continue to stir 80h with the stirring speed of 100rpm to obtain suspension, at this moment The volume ratio of isopropanol, deionized water and TDAA solution in the solution is 4:1:1.6, and the volume ratio of ammonia water and deionized water is 1:10;
[0054] 3) Centrifuge the obtained suspension at a speed of 8000 rpm for 10 minutes, then wash it with deionized water and isopropanol three times, and then dry it at 100° C. for 8 hours, and grind to obtain TiO 2 Sorbent powder.
[0055] TiO prepared in this example 2 Adsorbent, without lattice structure,...
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