TiO2 microsphere and preparation method therefor

A technology of microspheres and temperature control, which is applied in the direction of microsphere preparation, microcapsule preparation, chemical instruments and methods, etc., can solve the problems of difficult preparation of 1-10mm microspheres, and achieve less operation steps, simple operation and excellent reaction conditions mild effect

Inactive Publication Date: 2014-04-09
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solved the current TiO 2 Microsphere preparation technology is difficult to prepare 1-10mm microspheres

Method used

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  • TiO2 microsphere and preparation method therefor
  • TiO2 microsphere and preparation method therefor
  • TiO2 microsphere and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of TiO 2 Microspheres, the size of the microspheres is between 4-5mm.

[0034] One of the above TiO 2 The preparation method of microsphere specifically comprises the following steps:

[0035] (1) At room temperature, add 34g tetrabutyl titanate (100mmol) and 8.1g octadecylamine (30mmol) into 500mL ethylene glycol, control the concentration of tetrabutyl titanate to 0.2mol / L, octadecylamine Amine concentration is 0.06mol / L to make solution A;

[0036] (2) At room temperature, mix 200mL of water (11mol) and 500mL of ethanol, and control the concentration of water to 16mol / L to obtain solution B;

[0037] (3) Calculated according to the volume ratio, that is, the ratio of solution B: solution A is 7:5, first add 7mL solution B to a 50mL autoclave, and then put the container containing 5mL solution A into the autoclave In the kettle, the temperature was controlled to be 180° C. for 12 hours to obtain a reaction solution;

[0038] (4) Cool the autoclave to room ...

Embodiment 2

[0042] A kind of TiO 2 Microspheres, the size of the microspheres is between 2-5mm.

[0043] One of the above TiO 2 The preparation method of microsphere specifically comprises the following steps:

[0044] (1) At room temperature, add 34g tetrabutyl titanate (100mmol) and 27g octadecylamine (100mmol) to 500mL ethylene glycol, control the concentration of tetrabutyl titanate to 0.2mol / L, octadecylamine Concentration is 0.2 mol / L to make solution A;

[0045] (2) At room temperature, mix 200mL of water (11mol) and 500ml of ethanol, and control the concentration of water to 16mol / L to obtain solution B;

[0046] (3) Calculated according to the volume ratio, that is, the ratio of solution B: solution A is 7:5, first add 7mL solution B to a 50ml autoclave, and then put the container containing 5mL solution A into the autoclave In the kettle, the temperature was controlled to be 180° C. for 12 hours to obtain a reaction solution;

[0047] (4) Cool the autoclave to room temperat...

Embodiment 3

[0051] A kind of TiO 2 Microspheres, the size of the microspheres is between 4-7mm.

[0052] One of the above TiO 2 The preparation method of microsphere specifically comprises the following steps:

[0053] (1) At room temperature, add 34g of tetrabutyl titanate (100mmol) tetrabutyl titanate and 54g of octadecylamine (200mmol) into 500mL of ethylene glycol, and control the concentration of tetrabutyl titanate to 0.2mol / L, stearylamine concentration are 0.4mol / L to make solution A;

[0054] (2) At room temperature, mix 200mL of water (11mol) and 500mL of ethanol, and control the concentration of water to 16mol / L to obtain solution B;

[0055] (3) Calculated according to the volume ratio, that is, the ratio of solution B: solution A is 7:5, first add 7mL solution B to a 50mL autoclave, and then put the container containing 5mL solution A into the autoclave In the kettle, the temperature was controlled to be 180° C. for 12 hours to obtain a reaction solution;

[0056] (4) C...

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Abstract

The invention discloses a TiO2 microsphere and a preparation method therefor. The particle size of the TiO2 microsphere is 1-8 mm. The preparation method is as follows: tetrabutyl titanate and octadecylamine are added into glycol at the room temperature, the tetrabutyl titanate concentration is controlled in 0.2 mol/L, the octadecylamine concentration is controlled in 0.06-0.4 mol/L, and a solution A is obtained; water and ethanol are mixed in that, the water concentration is controlled in 9.3-27 mol/L, and a solution B is obtained; the solution B is added into a high pressure reactor, then a container containing the solution A is placed in the high pressure reactor, the volume ratio of the solution A to the solution B is 6-10:5; the reactor is sealed, the temperature is controlled at the temperature of 140-220 DEG C, after the reaction is carried out for 12h, the reactor is cooled to the room temperature; centrifugation is carried out, precipitate is collected, washed and dried, and TiO2 microspheres are obtained. The TiO2 microspheres can be used for catalysis to p-nitrophenol, and the efficiency can reach 0-41%. The preparation method is advantaged by simple operation and mild conditions, and is suitable for large scale production.

Description

technical field [0001] The present invention relates to a kind of TiO 2 Microspheres and methods for their preparation. Background technique [0002] Nano-TiO 2 It is not only widely used in the photocatalytic removal of harmful gases, but also shows broad application prospects in the photocatalytic degradation of organic pollutants in water. In addition, using it can also solve the pollution problem of metal ions such as mercury, chromium, and lead. Although TiO 2 Nanoparticles have these excellent properties, but there are still some problems that need to be solved urgently for large-scale application in practice. For example, how to overcome TiO 2 Nanoparticle agglomeration, improving its stability; how to recycle TiO after use 2 Nanoparticles and more. For this reason, scientific and technological workers of various countries have carried out a large amount of researches. Through research, it was found that TiO with nano-microstructure 2 The material has both Ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J13/02A62D3/17A62D101/28
Inventor 康诗钊薄林园李向清穆劲
Owner SHANGHAI INST OF TECH
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