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A kind of preparation method and product thereof of titanium dioxide large-size nanosheet

A titanium dioxide, large-scale technology, applied in the directions of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve problems such as unfavorable cost reduction and yield improvement, difficulty in meeting large-scale application of large-scale titanium dioxide nanosheets, etc. To achieve the effect of non-toxic source, simple and easy-to-control preparation method, and avoidance of process factors

Active Publication Date: 2019-06-21
CHONGQING UNIV OF POSTS & TELECOMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, its high dispersion requires strict control of the process to obtain it, which is not conducive to cost reduction and yield improvement. Therefore, the existing preparation methods are difficult to meet the needs of large-scale application of large-scale titanium dioxide nanosheets in practical engineering.

Method used

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  • A kind of preparation method and product thereof of titanium dioxide large-size nanosheet
  • A kind of preparation method and product thereof of titanium dioxide large-size nanosheet
  • A kind of preparation method and product thereof of titanium dioxide large-size nanosheet

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation method of large-scale titanium dioxide nanosheets, comprising the steps of:

[0034] (1) Preparation of reaction system

[0035] Mix tetrabutyl orthotitanate and ethanol at a mass ratio of 1:20 to form a uniform solution to obtain a "titanium source"; mix acid and water at a mass ratio of 0.095:200 to obtain an acid solution; "titanium source" and acid The solution constitutes the reaction system;

[0036] (2) Hydrolysis reaction

[0037] Drop the "titanium source" prepared in step (1) into an acid solution at a temperature of 2°C for a hydrolysis reaction to generate a white precipitate suspension and obtain a hydrolyzate;

[0038] (3) Peptization reaction

[0039] Preserving the hydrolyzate obtained in step (2) at an ambient temperature of 4°C for 10 days, the white precipitate is peptized to form a transparent sol, and the peptized product is obtained;

[0040] (4) ripening reaction

[0041] The peptized product obtained in step (3) was stored at a...

Embodiment 2

[0043] A preparation method of large-scale titanium dioxide nanosheets, comprising the steps of:

[0044] (1) Preparation of reaction system

[0045] Mix tetrabutyl orthotitanate and ethanol at a mass ratio of 1:1 to form a uniform solution to obtain a "titanium source"; mix acid and water at a mass ratio of 0.475:200 to obtain an acid solution; "titanium source" and acid The solution constitutes the reaction system;

[0046] (2) Hydrolysis reaction

[0047] Drop the "titanium source" prepared in step (1) into an acid solution at a temperature of 2°C for a hydrolysis reaction to generate a white precipitate suspension and obtain a hydrolyzate;

[0048] (3) Peptization reaction

[0049] Preserving the hydrolyzate obtained in step (2) at an ambient temperature of 4°C for 7 days, the white precipitate is peptized to form a transparent sol, and the peptized product is obtained;

[0050] (4) ripening reaction

[0051] The peptized product obtained in step (3) was stored at an ...

Embodiment 3

[0053] A preparation method of large-scale titanium dioxide nanosheets, comprising the steps of:

[0054] (1) Preparation of reaction system

[0055] Mix tetrabutyl orthotitanate and ethanol at a mass ratio of 1:1 to form a uniform solution to obtain a "titanium source"; mix acid and water at a mass ratio of 0.76:200 to obtain an acid solution. The "titanium source" and acid The solution constitutes the reaction system;

[0056] (2) carry out hydrolysis reaction

[0057] Drop the "titanium source" prepared in step (1) into an acidic solution at a temperature of 2°C for a hydrolysis reaction to generate a white precipitate suspension and obtain a hydrolyzate;

[0058] (3) Carry out peptization reaction

[0059] Preserving the hydrolyzate obtained in step (2) at an ambient temperature of 4°C for 5 days, the white precipitate is peptized, a transparent sol is formed, and a peptized product is obtained;

[0060] (4) Carry out ripening reaction

[0061] The peptized product obta...

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Abstract

The invention discloses large-sized titanium dioxide nanosheets and a preparation method thereof. The preparation method comprises the following steps: dripping an alcohol solution of titanium salt into an acid solution with the temperature of 0-30 DEG C for performing a hydrolysis reaction to obtain a hydrolyzate; placing the obtained hydrolyzate for 5-30 days at the temperature of 0-20 DEG C to obtain a clear peptized product; and storing the obtained peptized product for 15 days to 12 months at the temperature of 0-20 DEG C to obtain the large-sized titanium dioxide nanosheets. According to the preparation method, by a low-temperature liquid phase synthesis process, agglomeration of a reaction product is reduced or even avoided, and obtainment of the large-sized nanosheets is facilitated.

Description

technical field [0001] The invention relates to the technical field of nano functional materials, in particular to a method for preparing two-dimensional titanium dioxide large-size nanosheets and the obtained titanium dioxide nanosheets. Background technique [0002] Nanosheets refer to two-dimensional nanocrystals with a thickness of about 1 nm and a side length of several hundred nanometers to tens of microns. Due to the thickness close to the atomic or molecular level, nanosheets have the following two advantages: 1) the atoms are exposed on the surface, so the surface reactivity is extremely high; 2) for most materials, quantum confinement effects will occur, When electrons are transported in it, the control of the electron transport path can be realized, and the electron transport performance can be greatly improved; the electronic structure of the material can be adjusted and changed, which is conducive to the development of new physical properties. Therefore, in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053B82Y40/00
CPCC01G23/053C01G23/0532C01G23/0536C01P2002/72C01P2002/84C01P2004/04C01P2004/20
Inventor 唐笑楚婉怡钱觉时林景诚
Owner CHONGQING UNIV OF POSTS & TELECOMM