Anatase titanium dioxide nano-material with exposed controllable high-activity crystal faces and preparation method and application thereof

An anatase-type titanium dioxide and nano-material technology, applied in the field of nano-materials, can solve the problems of cumbersome steps, high recombination rate of photogenerated electron-hole pairs, low sunlight utilization rate, etc., achieve good antibacterial effect, high efficiency visible light catalytic inhibition The effect of bacterial performance

Active Publication Date: 2016-11-09
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as an antibacterial agent, titanium dioxide has some problems: 1. The recombination rate of photogenerated electron-hole pairs is high
2. The utilization rate of sunlight is relatively low
3. Titanium dioxide nanocrystals are easy to agg

Method used

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  • Anatase titanium dioxide nano-material with exposed controllable high-activity crystal faces and preparation method and application thereof
  • Anatase titanium dioxide nano-material with exposed controllable high-activity crystal faces and preparation method and application thereof
  • Anatase titanium dioxide nano-material with exposed controllable high-activity crystal faces and preparation method and application thereof

Examples

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Example Embodiment

[0032] A method for preparing anatase-type titanium dioxide nanomaterials with controllable and highly active crystal planes exposed specifically includes the following steps:

[0033] (1) The mole ratio is 1-10:5. Weigh water and ammonium fluoride to prepare solution A;

[0034] (2) Add titanium tetrachloride solution to solution A and stir for 0.5h at a speed of 800r / min to obtain solution B;

[0035] (3) Put solution B into a polytetrafluoroethylene reactor, and in a dry box at 170-210°C, react for 8-24 hours and then cool to room temperature;

[0036] 4) Pour out the supernatant in the hydrothermal reactor, and centrifuge the solid-liquid mixture at the bottom in a centrifuge at 10000r / pm for three times;

[0037] 5) Wash the precipitate obtained in step 4) successively with absolute ethanol and deionized water several times;

[0038] 6) Drying the washed precipitate obtained in step 5) at 60° C. for 6 hours to prepare anatase-type titanium dioxide nanomaterials with controllable and...

Example Embodiment

[0039] Example 1

[0040] Weigh 1.7g of ammonium fluoride and dissolve it in 10mL of water, stir and dissolve at a constant speed, add 2mL of titanium tetrachloride, continue to stir at 800r / min for 30min, transfer to a polytetrafluoroethylene lined autoclave, and react at 180℃ for 12h. After cooling down to room temperature, the reaction solution was centrifuged and washed three times with water in a centrifuge at 10000r / pm, and then the resulting precipitate was washed successively with absolute ethanol and deionized water for more than three times, and then dried at 60°C for 6 hours. Anatase-type titanium dioxide nanomaterials (marked as T1) with controllable and highly active crystal faces exposed, the ratio of {001} crystal faces to {101} crystal faces of the material is 1%, and the size is 50-70nm.

Example Embodiment

[0041] Example 2

[0042] Weigh 1.2 g of ammonium fluoride and dissolve it in 10 mL of water, stir and dissolve at a constant speed, add 2 mL of titanium tetrachloride, continue to stir at 800r / min for 30 minutes, transfer to a polytetrafluoroethylene-lined autoclave, and react at 210°C for 8 hours. After cooling down to room temperature, the reaction solution was centrifuged and washed three times with water in a centrifuge at 10000r / pm, and then the resulting precipitate was washed successively with absolute ethanol and deionized water for more than three times, and then dried at 60°C for 6 hours. Anatase-type titanium dioxide nanomaterials (marked as T2) with controllable and highly active crystal faces exposed, the ratio of {001} crystal faces to {101} crystal faces of the material is 10%, and the size is 50-70nm.

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Abstract

The invention relates to an anatase titanium dioxide nano-material with exposed controllable high-activity crystal faces and a preparation method and application thereof and belongs to the technical field of nano-materials. The ratio of the crystal face {001} to the crystal face {101} of the anatase titanium dioxide nano-material for exposing the controllable high-activity crystal faces is 1% or 10% or 35% or 50%, and the sizes both range from 50 nm to 70 nm. The preparation method of the anatase titanium dioxide nano-material with the exposed controllable high-activity crystal faces includes the steps that titanium tetrachloride serves as a titanium source, water serves as a reaction solvent, ammonium fluoride serves as a morphology control agent, and nanometer titania is prepared through a solvothermal method. The anatase titanium dioxide nano-material with the controllable {001} crystal face and the controllable {101} crytal face is prepared by adjusting the molar ratio, the reaction temperature and the reaction time of reaction raw materials. The titanium dioxide nano-material with the crystal face ratio and sizes can be used for inhibiting growth of bacteria, and has efficient visible light catalytic antibacterial performance.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to an anatase titanium dioxide nanomaterial with controllable high-activity crystal faces exposed, a preparation method and application thereof. Background technique [0002] Anatase titanium dioxide has been widely studied in semiconductor materials due to its high photocatalytic activity, strong photocorrosion resistance, low toxicity, and relatively low price. At the same time, titanium dioxide nanocrystals have a strong ability to absorb ultraviolet rays, good thermal stability, chemical stability, and excellent optical and electrical characteristics, and have become an excellent inorganic antibacterial agent in recent years. However, as an antibacterial agent, titanium dioxide has some problems: 1. The recombination rate of photogenerated electron-hole pairs is high. 2. The utilization rate of sunlight is relatively low. 3. Titanium dioxide nanocrystals are easy to aggl...

Claims

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Application Information

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IPC IPC(8): C01G23/053A01N59/16A01P1/00B82Y30/00
CPCA01N59/16C01G23/0536C01P2004/64
Inventor 张海元刘宁程岩常赟冯艳林
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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