Preparation method for hollow silicate

A silicate and hollow technology, applied in the field of silicates, can solve the problems of insufficient research on synthesis methods and preparation condition parameters, and no silicates have been found, and achieve the effects of simple post-processing, wide versatility, and mild conditions.

Inactive Publication Date: 2010-10-20
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the existing silicate material preparations focus on the preparation of different morphologies, and there is insufficient research on the synthesis methods and preparation condition parameters of different metal silicate materials during the preparation process.
More importantly, a general method for the synthesis of silicates with hollow morphology has not been found, which is limited to varying degrees in practical applications.

Method used

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  • Preparation method for hollow silicate
  • Preparation method for hollow silicate
  • Preparation method for hollow silicate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Synthesis of silica nanospheres: 1.6mL tetraethyl orthosilicate, 1.6mL water and 1.6mL ammonia water were added to 27.2mL ethanol, and after reacting at room temperature for 6 hours, the obtained product was washed 6 times with ethanol and water respectively, Get silica nanospheres (see figure 1 ).

[0025] 2) Add 10mL water and 5mL ethanol to the 25mL polytetrafluoroethylene lining, and then add 25mg silicon dioxide, 0.675g urea, 0g dihydrate-2-hydroxy-5-sulfobenzoic acid, 0.073g hexahydrate Nickel nitrate was added. The polytetrafluoroethylene lining was placed in the reaction kettle, and the temperature was kept at 190°C for 36h.

[0026] 3) After the reaction is completed and cooled to room temperature, the obtained solid product is washed three times with water and ethanol respectively to obtain the target product.

[0027] The composition and morphology of the product were systematically studied by X-ray powder diffraction and transmission electron microscop...

Embodiment 2

[0029] 1) Synthesis of silica nanospheres: 6.4mL tetraethyl orthosilicate, 2.4mL water and 3.2mL ammonia water were added to 54.4mL ethanol, and after reacting at room temperature for 3h, the obtained product was washed twice with ethanol and water respectively, That is, silica nanospheres are obtained.

[0030] 2) Add 10mL water and 5mL ethanol to the 25mL polytetrafluoroethylene lining, and then add 35mg silicon dioxide, 0.675g urea, 0g dihydrate-2-hydroxy-5-sulfobenzoic acid, 0.073g hexahydrate Nickel nitrate was added. The polytetrafluoroethylene lining was placed in the reaction kettle, and the temperature was kept at 190°C for 36h.

[0031] 3) After the reaction is completed and cooled to room temperature, the obtained solid product is washed with water and ethanol four times respectively to obtain the target product.

Embodiment 3

[0033] 1) Synthesis of silica nanospheres: 3.2mL tetraethyl orthosilicate, 3.2mL water and 6.4mL ammonia water were added to 108.8mL ethanol, and after reacting at room temperature for 9 hours, the obtained product was washed 10 times with ethanol and water respectively, That is, silica nanospheres are obtained.

[0034] 2) Add 10mL of water and 5mL of ethanol to 25mL of polytetrafluoroethylene lining, and then add 50mg of silicon dioxide, 0.675g of urea, 0g of dihydrate-2-hydroxy-5-sulfobenzoic acid, and 0.073g of hexahydrate Nickel nitrate was added. The polytetrafluoroethylene lining was placed in the reaction kettle, and the temperature was kept at 190°C for 36h.

[0035] 3) After the reaction is completed and cooled to room temperature, the obtained solid product is washed with water and ethanol for 6 times respectively to obtain the target product.

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Abstract

The invention relates to silicate and provides a preparation method for hollow silicate, in particular to a simple and effective method for preparing hollow silicate under solvothermal conditions. The method comprises the following steps: synthesizing silicon dioxide nanospheres: mixing tetraethoxysilane, water, ammonia water and ethanol by volume ratio of 1: (0.25-2): (0.25-4): (4.25-68) of tetraethoxysilane to water to ammonia water to ethanol, and washing the obtained products after reaction to obtain the silicon dioxide nanospheres; and adding the silicon dioxide nanospheres, urea, dihydrate-2-hydroxy-5-sulfo-benzoicacid and nitrate hexahydrate in water and ethanol, and cooling the obtained solid product to room temperature after reaction, and washing the obtained solid product to obtain the target product, i.e. the hollow silicate.

Description

technical field [0001] The invention relates to a silicate, in particular to a method for preparing hollow silicate by solvothermal. Background technique [0002] With the research and application of nanomaterial preparation technology and new properties, nanomaterials have become one of the hot spots that people pay attention to. Now people are not satisfied with simple nanomaterials. Nanomaterials in hollow form are important components in materials. Due to its unique application value, hollow materials have attracted extensive attention of researchers. The existing hollow structure preparation methods mainly include hard template method (S.W.Kim, M.Kim, W.Y.Lee, T.Hyeon, J.Am.Chem.Soc.2002, 124, 7642) and soft template method (H.L.Xu, W.Z.Wang, Angew.Chem.Int.Ed.2007, 46,1489), but there are many defects in these methods, need to remove template as hard template, and soft template can introduce surfactant and cause product impurity, meanwhile, the whole The operation p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/20B82B3/00
Inventor 江智渊郑君吴炳辉黄荣彬
Owner XIAMEN UNIV
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