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Preparing method of super-hydrophilicity titanium dioxide hollow micro-nanospheres

A technology of titanium dioxide and micro-nano spheres, applied in the field of photocatalytic materials, can solve problems such as energy consumption, unfavorable practical application, damage, etc., and achieve the effect of avoiding human body damage

Inactive Publication Date: 2016-02-17
QINGDAO HAIER SMART TECH R & D CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ultraviolet light used in this method has damage and aging effects on the human body and plastic material parts. The maintenance of the super-hydrophilic state requires additional operations, which is not conducive to practical applications, and there is also the problem of additional energy consumption.
The hydrophilicity of titanium dioxide, especially the superhydrophilicity, has important applications in the anti-condensation of refrigerators, freezers, wine cabinets, air conditioners and other household appliances and the self-cleaning of glass and walls, but it is not currently used in indoor weak light. Preparation method of titanium dioxide with long-lasting superhydrophilic activity under certain conditions

Method used

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  • Preparing method of super-hydrophilicity titanium dioxide hollow micro-nanospheres
  • Preparing method of super-hydrophilicity titanium dioxide hollow micro-nanospheres
  • Preparing method of super-hydrophilicity titanium dioxide hollow micro-nanospheres

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preparation example Construction

[0023] In order to achieve the above purpose, the technical scheme adopted in the preparation method of a hydrophilic titanium dioxide hollow micro-nanosphere of the present invention is: introducing a template agent and a chelating complexing agent into the hydrothermal reaction system to induce the directional deposition and regulation of titanium ions The growth mode of the titanium dioxide crystal growth unit is to obtain titanium dioxide micro-nanospheres with a hollow structure and broad-spectrum response characteristics after the inner core is removed by calcination. The specific steps are:

[0024] 1) Using self-made monodisperse polystyrene spheres with negative charges on the surface as a template, the polystyrene sphere template and TiCl 3 The aqueous solution is mixed, and then a certain amount of potassium persulfate is added as a chelating complexing agent, and then transferred into a hydrothermal reaction kettle.

[0025] 2) Seal and mark the reaction kettle, p...

Embodiment 1

[0033] Take 0.2 g of polystyrene balls with a diameter of 700 nm and 0.15 mol / L of TiCl 3 90 mL of the aqueous solution was mixed under the condition of 800 r / min magnetic stirring, and then 1 g of potassium persulfate was added. Transfer the above mixed solution into a 100mL hydrothermal reaction kettle lined with tetrafluoroethylene, seal and mark. The above reaction kettle was put into a drying oven preheated to 200°C in advance, and kept at 200°C for 3 hours to carry out hydrothermal reaction. After naturally cooling to room temperature, the solid product in the reactor was washed several times with deionized water, and then dried at 60°C. Put the dried sample into a muffle furnace, raise the temperature to 500°C at a rate of 4°C / min and keep it for 6 hours, then raise it to 600°C at a rate of 1°C / min and keep it for 3 hours, and finally obtain a titanium dioxide hollow microstructure. ball structure.

Embodiment 2

[0035] The only difference from Example 1 is that the consumption of potassium persulfate is 0.4g.

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Abstract

The invention discloses a preparing method of super-hydrophilicity titanium dioxide hollow micro-nanospheres. The preparing method comprises the steps of mixing a polystyrene sphere template with a TiCl3 water solution, adding a chelating complexant, and transferring into a hydrothermal reaction kettle; sealing the reaction kettle, then placing into a preheated dry box for a hydrothermal reaction, washing obtained a solid product with deionized water, and drying at 50-58 DEG C; calcinating the dried solid product to remove the template, thus obtaining the titanium dioxide hollow micro-nanospheres. The titanium dioxide material obtained through the preparing method has the characteristic of keeping the super-hydrophilicity activity for a long term in an indoor dim light environment, avoids the harm to a human body and an aging damage effect to an organic material caused by ultraviolet light, reduces extra operation and has important application value in antifog and anti-condensation aspects.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a method for preparing titanium dioxide hollow micro-nanospheres capable of maintaining superhydrophilic activity for a long time in an indoor weak light environment. Background technique [0002] Condensation and fogging are phenomena in which high-humidity gas liquefies into liquid droplets on the surface of an object when the temperature reaches or is very close to the dew point temperature. Condensation and mist condensation not only affect the appearance of refrigerators, wine cabinets, air conditioners and other home appliances, but also absorb dust and sundries in the air. Long-term condensation and mist condensation will cause corrosion and rust of metal parts, stink and mold of plastic parts, reduce the service life of home appliances, and even lead to water leakage and even electrical safety accidents. [0003] At present, the anti-condensa...

Claims

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Application Information

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IPC IPC(8): C01G23/053B82Y30/00
Inventor 刘朝红刘振宇周晓东范博慧
Owner QINGDAO HAIER SMART TECH R & D CO LTD
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