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Preparation method of titanium bismuth oxyfluoride layered compound hierarchical-structure porous hollow spheres

A titanium oxyfluoride, hierarchical structure technology, applied in bismuth compounds, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., to achieve the effects of good reference, low production cost, and convenient operation

Inactive Publication Date: 2017-03-15
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is well known that the performance of photocatalytic materials is closely related to their morphology, therefore, it has always been a great challenge to explore photocatalytic materials with special morphology.

Method used

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  • Preparation method of titanium bismuth oxyfluoride layered compound hierarchical-structure porous hollow spheres
  • Preparation method of titanium bismuth oxyfluoride layered compound hierarchical-structure porous hollow spheres
  • Preparation method of titanium bismuth oxyfluoride layered compound hierarchical-structure porous hollow spheres

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Experimental program
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Effect test

Embodiment 1

[0026] 1) Weigh 1mmol of titanium dioxide, dissolve it in 5mL of hydrofluoric acid, remove the remaining hydrofluoric acid as much as possible by heating and evaporation, and finally dilute to 10mL with water.

[0027] 2) Weigh 2mmol of bismuth nitrate and dissolve it in 30mL of ethylene glycol.

[0028] 3) Add the solution in step 1) dropwise to the solution in step 2) under magnetic stirring, and mix well.

[0029] 4) The obtained mixed solution was transferred to a 50mL reaction autoclave, sealed, and reacted at a constant temperature of 150°C for 12 hours, and naturally cooled to room temperature after the reaction.

[0030] 5) The reaction product was suction filtered, washed alternately with water and ethanol several times, and dried at 60°C for 5 hours to obtain Bi 2 TiO 4 f 2 powder product.

Embodiment 2

[0032] 1) Weigh 1mmol of titanium dioxide, dissolve it in 5mL of hydrofluoric acid, remove the remaining hydrofluoric acid as much as possible by heating and evaporation, and finally dilute to 13mL with water.

[0033] 2) Weigh 2mmol of bismuth nitrate and dissolve it in 26mL of ethylene glycol.

[0034] 3) Add the solution in step 1) dropwise to the solution in step 2) under magnetic stirring, and mix well.

[0035] 4) The obtained mixed solution was transferred to a 50mL reaction autoclave, sealed, and reacted at a constant temperature of 150°C for 12 hours, and naturally cooled to room temperature after the reaction.

[0036] 5) The reaction product was suction filtered, washed alternately with water and ethanol several times, and dried at 60°C for 5 hours to obtain Bi 2 TiO 4 f 2 powder product.

Embodiment 3

[0038] 1) Weigh 1mmol of titanium dioxide, dissolve it in 5mL of hydrofluoric acid, remove the remaining hydrofluoric acid as much as possible by heating and evaporation, and finally dilute to 15mL with water.

[0039] 2) Weigh 2mmol of bismuth nitrate and dissolve it in 25mL of glycerol.

[0040] 3) Add the solution in step 1) dropwise to the solution in step 2) under magnetic stirring, and mix well.

[0041] 4) The obtained mixed solution was transferred to a 50mL reaction autoclave, sealed, and reacted at a constant temperature of 180°C for 12 hours, and naturally cooled to room temperature after the reaction.

[0042] 5) The reaction product was suction filtered, washed alternately with water and ethanol several times, and dried at 60°C for 5 hours to obtain Bi 2 TiO 4 f 2 powder product.

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Abstract

The invention relates to a preparation method of titanium bismuth oxyfluoride layered compound hierarchical-structure porous hollow spheres, and belongs to the field of inorganic material chemistry. The preparation method is characterized in that a hydrofluoric acid solution of titanium dioxide and an alcohol solution of bismuth salt are subjected to mixed solvothermal reaction and subjected to washing treatment to form Aurivillius structure titanium bismuth oxyfluoride (Bi2TiO4F2). The preparation method has the following advantages: (1) based on the low-temperature solvothermal technique, the preparation method has the advantages of simple process, convenience in operation, no special equipment requirements, and low production cost, and is friendly to the environment; (2) the morphology of the product obtained based on the synthesis technique is hierarchical-structure porous hollow spheres, and is advantageous to application in photocatalysis; and (3) the method has a good reference on low temperature liquid phase synthesis of other oxyfluoride perovskites.

Description

technical field [0001] The invention belongs to the field of inorganic material chemistry. Background technique [0002] Titanium bismuth oxyfluoride (Bi 2 TiO 4 f 2 ) is an Aurivillius type layered perovskite structure bismuth-based compound. First, as a layered perovskite, its unique layered structure can effectively separate photogenerated electrons and holes, which plays an important role in improving the catalytic performance of the material; secondly, as a bismuth-based compound, Bi 3+ The ion contains the stereochemically active 6 s 2 lone pairs of electrons, their inherent polarization is conducive to the separation of photogenerated electron-hole pairs and the effective transfer of carriers; again, as an oxyfluoride, the extremely strong electronegativity of fluorine makes it have a greater electronegativity The traction force is beneficial to reduce the recombination of photogenerated carriers. Therefore, Bi 2 TiO 4 f 2 Semiconductor materials have very b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G29/00B01J23/18
CPCC01G29/006B01J23/18C01P2002/72C01P2004/34C01P2004/03B01J35/39
Inventor 雷水金邓佩琴高希杰程荻
Owner NANCHANG UNIV
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