Method for preparing anatase type titanium dioxide/ montmorillonite nano composite material
A nano-composite material, titanium dioxide technology, applied in catalyst activation/preparation, chemical instruments and methods, botanical equipment and methods, etc., can solve problems such as limitations, inability to apply, and no anatase-type titanium dioxide phase transition temperature research, etc., To achieve the effect of increased thermal stability
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[0030] The preparation method of anatase type titanium dioxide / montmorillonite nanocomposite material of the present invention comprises the following steps:
[0031] 1) Preparation of organic montmorillonite powder: disperse the montmorillonite powder in water to form a 5-10 wt% suspension, and add a long-chain alkyl ammonium salt whose molar number is 1-3 times the cation exchange capacity of the montmorillonite , after microwave heating and reaction, washing with water, drying at a temperature lower than 105°C, and grinding to a size below 100 mesh to obtain the organic montmorillonite powder;
[0032] Among them, the cation exchange capacity of montmorillonite is measured by conventional ammonium chloride-formaldehyde condensation method.
[0033] 2) In an alcohol solvent, the organic montmorillonite powder is mixed with titanate to form a mixed solution; specific operations include:
[0034] a) Weighing the organic montmorillonite powder and mixing it with an alcohol sol...
example 1
[0047] The specific preparation method is as follows:
[0048] 1) Preparation of organic montmorillonite powder: carry out gravity purification on montmorillonite as it is, weigh 15g montmorillonite and disperse it in distilled water to make a 10wt% stable suspension, and add the mole number to 1 time of the cation exchange capacity of montmorillonite Hexadecyltrimethylammonium bromide is heated in a microwave oven to make the alkylammonium salt cations enter the interlayer of montmorillonite through cation exchange, and expand the interlayer of montmorillonite. After the reaction is completed, filter, dry at 105°C, and grind to 100 mesh with a ball mill to obtain organic montmorillonite powder;
[0049] 2) Weigh 12g of organic montmorillonite powder, add it into a beaker filled with absolute ethanol, make a montmorillonite suspension with a mass concentration of 7%, and stir evenly;
[0050] 3) dissolving butyl titanate in absolute ethanol to prepare a titanate solution with...
example 2
[0061] 1) Preparation of organic montmorillonite powder: its purification and preparation method are the same as in Example 1.
[0062] The difference is: take 12g montmorillonite and disperse it in distilled water to make a 10wt% stable suspension, add dodecyltrimethylammonium chloride and octadecyl trimethylammonium chloride whose molar number is 1 times of the cation exchange capacity of montmorillonite respectively. Alkyltrimethylammonium Chloride.
[0063] 2) Weigh 10g of organic montmorillonite powder, add it into a beaker filled with isopropanol, and make a montmorillonite suspension with a mass concentration of 10%, and stir evenly;
[0064] 3) Dissolving tetraisopropyl titanate in isopropanol to prepare an isopropanol solution with a concentration of 0.64mol / L tetraisopropyl titanate, and stir evenly;
[0065] 4) Add the isopropanol solution of tetraisopropyl titanate in step 3) to the organic montmorillonite suspension in step 2) and mix, the mixture between tetrais...
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