Mesoporous titania material with high crystal phase transition temperature and preparation method thereof
A technology of mesoporous titanium dioxide and mesoporous silica, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of low crystal phase transition temperature, low crystal phase transition temperature and poor structural order of titanium dioxide nanomaterials , to achieve the effect of simple preparation method, high phase transition temperature and large specific surface area
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[0038] refer to figure 1 , the embodiment of the present application provides a method for preparing a mesoporous titanium dioxide material with a high crystal phase transition temperature, comprising the following steps:
[0039] In step S101, the titanate is dissolved in an organic solvent, and then water is added for hydrolysis to obtain a hydrolyzed product; wherein, the titanate is hydrolyzed to produce a flocculent titanium hydroxide, and the titanate is selected from isopropyl titanate, One or a mixture of n-butyl titanate; the organic solvent is selected from methanol, ethanol, tetrahydrofuran, ethylene glycol, n-butanol or a mixture of more; titanate, organic solvent and water The mass ratio is 1:200:200~1:1:1;
[0040] In step S102, the hydrolyzate is filtered, washed, and dried to obtain a solid product titanium hydroxide, and the solid product is added to the first solution to obtain a precursor solution; the first solution is selected from any one or more of hydr...
Embodiment 1
[0052] Example 1 of the present application provides a method for preparing a mesoporous titanium dioxide material with a high crystal phase transition temperature, comprising the following steps:
[0053] In step S101, 10 g of isopropyl titanate was weighed and dissolved in 500 g of ethylene glycol, and then 500 mL of distilled water was added for hydrolysis to obtain a hydrolyzate;
[0054] Step S102, filtering, washing, and drying the obtained hydrolyzate to obtain a solid product of titanium hydroxide, weighing 0.25 g of titanium hydroxide and dissolving it in 50 mL of concentrated hydrochloric acid, stirring and dissolving to obtain a transparent precursor solution;
[0055] Step S103, weighing 1.0 g of SBA-15-OH and adding it to the precursor solution, stirring, and putting it in an oven at 50° C. to evaporate the solvent to obtain a metal salt-silicon dioxide composite material;
[0056] Step S104, transferring the metal salt-silicon dioxide composite material to a muff...
Embodiment 2
[0060] Example 2 of the present application provides a method for preparing a mesoporous titanium dioxide material with a high crystal phase transition temperature, comprising the following steps:
[0061] In step S101, 10 g of isopropyl titanate was weighed and dissolved in 450 g of n-butanol, and then 400 mL of distilled water was added for hydrolysis to obtain a hydrolyzate;
[0062] Step S102, filtering, washing, and drying the obtained hydrolyzate to obtain titanium hydroxide, weighing 0.36g of titanium hydroxide and dissolving it in 50mL of concentrated nitric acid, stirring and dissolving to obtain a transparent precursor solution;
[0063] Step S103, weighing 1.0 g of SBA-15-OH and adding it to the precursor solution, stirring, and putting it in an oven at 50° C. to evaporate the solvent to obtain a metal salt-silicon dioxide composite material;
[0064] Step S104, transferring the metal salt-silicon dioxide composite material to a muffle furnace, and calcining in a ni...
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