Preparation method for broad-spectrum-response titanium dioxide hollow micro-nanospheres

A technology of titanium dioxide and micro-nano spheres, which is applied in the field of photocatalytic materials, can solve problems such as reducing the stability of composite material systems, potential risks to human health and safety, and negative impacts on the ecological environment, so as to avoid harm to the human body and stability performance, and the effect of improving the utilization rate

Inactive Publication Date: 2016-03-02
QINGDAO HAIER SMART TECH R & D CO LTD
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Problems solved by technology

However, the release of impurities and harmful heavy metal ions introduced by doping or coupling modification will reduce the stability of the composite material system, pose potential risks to human health and safety, and have a negative impact on the ecological environment. Scientific research proves

Method used

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  • Preparation method for broad-spectrum-response titanium dioxide hollow micro-nanospheres
  • Preparation method for broad-spectrum-response titanium dioxide hollow micro-nanospheres
  • Preparation method for broad-spectrum-response titanium dioxide hollow micro-nanospheres

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preparation example Construction

[0024] In order to achieve the above purpose, the technical scheme adopted in the preparation method of a broad-spectrum response 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 of titanium ions And control the growth mode of the titanium dioxide crystal growth unit, and obtain the titanium dioxide micro-nanosphere with hollow structure and broad-spectrum response characteristics after removing the inner core by calcination. The specific steps are:

[0025] 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 a certain amount of soluble persulfate is added as a chelating complexing agent, and then transferred into a hydrothermal reaction kettle. The soluble persulfate is potassium persulfate, s...

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 the muffle furnace, raise the temperature up to 500°C at a rate of 5°C / min and keep it for 4 hours, then raise it to 600°C at a rate of 2°C / min and keep it for 2 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 1.2g.

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Abstract

The invention discloses a preparation method for broad-spectrum-response titanium dioxide hollow micro-nanospheres. The preparation method comprises the following steps: mixing a polystyrene sphere template and a TiCl3 aqueous solution, adding a chelating coordination agent, and transferring into a hydrothermal reaction kettle; sealing the reaction kettle, putting the reaction kettle in a pre-heated drying oven, carrying out a hydrothermal reaction, washing the obtained solid product with deionized water, and drying at the temperature of 60-70 DEG C; and calcining the dried solid product to remove the template, and thus obtaining the titanium dioxide hollow micro-nanospheres. The titanium dioxide material obtained through the preparation method has a broad-spectrum absorption characteristic in ultraviolet-visible-near infrared light regions, greatly improves the utilization rate of light energy, reduces the requirements to a light source, and avoids damage of ultraviolet light on the human body and aging destructive effects of the ultraviolet light on organic materials.

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 with ultraviolet-visible-near-infrared broad-spectrum response characteristics. Background technique [0002] Electrical equipment such as refrigerators and freezers will have peculiar smell after being used for a period of time. Sometimes even after cleaning, the peculiar smell still exists. At present, the methods for removing peculiar smell in refrigerators and freezers mainly include physical adsorption methods relying on porous materials such as activated carbon and medical stone, and photocatalyst chemical decomposition methods represented by titanium dioxide. The physical adsorption method requires frequent replacement of the adsorbent, which is not efficient in odor removal, takes a long time, and treats the symptoms but not the root cause; the photochemical decomposition method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y30/00
CPCY02P20/10
Inventor 刘朝红李玉祥杜宝亮董书娟
Owner QINGDAO HAIER SMART TECH R & D CO LTD
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