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Anatase titanium dioxide nanomaterial with controllable and highly active crystal face exposed, its preparation method and application

An anatase-type titanium dioxide and nanomaterial technology, applied in the field of nanomaterials, can solve the problems of high recombination rate of photogenerated electron-hole pairs, cumbersome steps, easy agglomeration of titanium dioxide nanocrystals, etc., and achieve efficient visible light catalytic antibacterial performance, good The effect of the antibacterial effect

Active Publication Date: 2018-02-13
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
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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 agglomerate
4. Most of the preparation process requires high-temperature calcination, and the steps are cumbersome
So far, there has been no study on the antibacterial properties of anatase TiO2 with different ratios of {001} and {101} crystal planes

Method used

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  • Anatase titanium dioxide nanomaterial with controllable and highly active crystal face exposed, its preparation method and application
  • Anatase titanium dioxide nanomaterial with controllable and highly active crystal face exposed, its preparation method and application
  • Anatase titanium dioxide nanomaterial with controllable and highly active crystal face exposed, its preparation method and application

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preparation example Construction

[0032] A method for preparing an anatase titanium dioxide nanomaterial exposing a controllable highly active crystal face, specifically comprising the following steps:

[0033] (1) Weigh water and ammonium fluoride at a molar ratio of 1 to 10:5 to prepare solution A;

[0034] (2) Add titanium tetrachloride solution in solution A, stir 0.5h with the speed of 800r / min, make solution B;

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

[0036] 4) Pour off the supernatant in the hydrothermal reaction kettle, and wash the solid-liquid mixture at the bottom in a 10000rpm centrifuge with water for three times;

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

[0038] 6) drying the washed precipitate obtained in step 5) at 60° C. for 6 hours to prepare anatase titanium dioxide nanomaterials with c...

Embodiment 1

[0040] Weigh 1.7g of ammonium fluoride and dissolve it in 10mL of water. After stirring at a constant speed to dissolve, add 2mL of titanium tetrachloride, continue to stir at a speed of 800r / min for 30min, transfer to a polytetrafluoroethylene-lined autoclave, and react at 180°C for 12h. After cooling down to room temperature, put the reaction solution in a centrifuge at 10,000rpm, wash it with water for three times, then wash the obtained precipitate with absolute ethanol and deionized water for more than three times, and then dry it at 60°C for 6 hours to obtain the exposed The anatase titanium dioxide nanomaterial (marked as T1) with controlled high-activity crystal plane, the ratio of {001} crystal plane and {101} crystal plane of the material is 1%, and the size is 50-70nm.

Embodiment 2

[0042] Weigh 1.2g of ammonium fluoride and dissolve it in 10mL of water. After stirring at a constant speed to dissolve, add 2mL of titanium tetrachloride, continue to stir at a speed of 800r / min for 30min, transfer to a polytetrafluoroethylene-lined autoclave, and react at 210°C for 8h. After cooling down to room temperature, put the reaction solution in a centrifuge at 10,000rpm, wash it with water for three times, then wash the obtained precipitate with absolute ethanol and deionized water for more than three times, and then dry it at 60°C for 6 hours to obtain the exposed The anatase titanium dioxide nanomaterial (marked as T2) with controlled high-activity crystal plane, the proportion of {001} crystal plane and {101} crystal plane 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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Patent Type & Authority Patents(China)
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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