Functionalized silicon coating mesoporous magnetic carrier and preparation method and application thereof
A magnetic carrier, silicon coating technology, applied in chemical instruments and methods, fixed on or in inorganic carriers, adsorbed water/sewage treatment, etc. , to achieve the effect of good treatment of sewage, protection of acid and alkali corrosion, and easy separation
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Embodiment 1
[0049] (1) Silicon coating by saturated solution method: add 3.0g Fe to 100ml deionized water 3 o 4 After the particles were ultrasonically dispersed for 30 minutes, slowly add 10ml of 0.5moL·dm -3 , sodium silicate solution, and use dilute sulfuric acid to adjust the pH of the solution to about 3.0, keep the reaction at 40±3°C for 3 hours, then raise the temperature to 95±3°C for 1 hour, separate, wash with water and dry to obtain a one-step silicon-coated magnetic carrier;
[0050] (2) Molecular templating: take 3.0 g of the product of step (1) and add it into 100 ml of deionized water for ultrasonic dispersion for 20 minutes, add 2.9 wt% cetyltrimethylammonium bromide solution CTAB under stirring, and separate it after 30 minutes of reaction product;
[0051] (3) Sol-gel method of silicon coating: the product of step (2) was added to 100ml of 95% ethanol, slowly added 10ml of ethyl orthosilicate TEOS, and reacted for 3 hours under the condition of an appropriate amount o...
Embodiment 2
[0055] (1) Silicon coating by saturated solution method: add 8.0g Fe to 150ml deionized water 3 o 4 After the particles are ultrasonically dispersed for 60 minutes, slowly add 25ml of 0.6moL.dm under stirring condition -3 Sodium silicate solution, adjust the pH of the solution to about 3.5 with dilute sulfuric acid, keep it warm at 40±3°C for 3.5 hours, then raise the temperature to 95±3°C for 2 hours, separate, wash with water and dry to obtain a one-step silicon-coated magnetic carrier ;
[0056] (2) Molecular templating: Take 3.0 g of the product of step (1) and add it to 100 ml of deionized water for ultrasonic dispersion for 30 minutes, add 5.7 wt% cetyltrimethylammonium bromide solution CTAB under stirring, and separate after 40 minutes of reaction to obtain product;
[0057] (3) Sol-gel method of silicon coating: add 100ml of 95% ethanol to the product of step (2), slowly add 25ml of ethyl orthosilicate TEOS, react for 4 hours, separate and wash with ethanol, and vac...
Embodiment 3
[0061] (1) Silicon coating by saturated solution method: add 9.0g Fe to 200ml deionized water 3 o 4 After the particles were ultrasonically dispersed for 120 minutes, add 12.5ml of 1.0moL·dm under stirring condition -3 Sodium silicate solution, adjust the pH of the solution to about 4.0 with dilute sulfuric acid, keep it warm at 40±3°C for 3.5 hours, then raise the temperature to 95±3°C for 1.5 hours, separate, wash with water and dry to obtain a one-step silicon-coated magnetic carrier ;
[0062] (2) Molecular templating: Take 3.0 g of the product of step (1) and add it into 100 ml of deionized water for ultrasonic dispersion for 60 minutes, add 2.97 wt% cetyltrimethylammonium bromide solution CTAB under stirring, and separate after 60 minutes of reaction to obtain product;
[0063] (3) sol-gel method silicon coating: add 100ml 98% ethanol to the product of step (2), add 8ml ethyl orthosilicate (TEOS), react 4 hours under the condition that an amount of ammonia is made cat...
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