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A kind of one-step preparation method of nanometer anatase type titanium dioxide

A titanium dioxide and nano-anatase technology, applied in the field of nanomaterials, can solve the problems of harsh preparation conditions, unstable titanium source, and many influencing factors, and achieve the effects of short preparation time, easy reaction control, and few influencing factors.

Active Publication Date: 2019-08-16
CHINA UNIV OF MINING & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, each method has its own limitations. The comprehensive overview is as follows: the process is complicated, the process is cumbersome, difficult to control, and there are many influencing factors; the titanium source used in the preparation process is unstable, easy to hydrolyze, and the synthesis and preparation conditions are harsh; Above 100 degrees Celsius; the preparation usually requires calcination to cause secondary agglomeration of particles

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  • A kind of one-step preparation method of nanometer anatase type titanium dioxide
  • A kind of one-step preparation method of nanometer anatase type titanium dioxide
  • A kind of one-step preparation method of nanometer anatase type titanium dioxide

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Embodiment 1

[0023] A kind of one-step preparation method of nanometer anatase type titanium dioxide, comprises the following steps:

[0024] (1) Add the metered ethylene glycol, tetrabutyl titanate, and ammonium sulfate into containers filled with 0.1-0.2 mol / L dilute sulfuric acid in sequence, and mix and dissolve to obtain a mixed solution; the tetrabutyl titanate The molar ratio between ethylene glycol and ammonium sulfate is 1:50:16;

[0025] (2) Stir the mixed solution at room temperature for 20 minutes, control the pH value of the mixed solution to 3, and after mixing evenly, place the mixed solution in a water bath at 75° C. to heat and keep it warm for 5 hours, and then stand and centrifuge to obtain a sample;

[0026] (3) Adjust the pH value of the sample to neutral with dilute ammonia water, wash it twice with distilled water, and finally vacuum-dry the sample at 40°C for 2.5 hours to obtain a white powder, which is nano-anatase titanium dioxide.

[0027] The morphology of the ...

Embodiment 2

[0029] A kind of one-step preparation method of nanometer anatase type titanium dioxide, comprises the following steps:

[0030] (1) Add the metered ethylene glycol, tetrabutyl titanate, and ammonium sulfate into containers filled with 0.1-0.2 mol / L dilute sulfuric acid in sequence, and mix and dissolve to obtain a mixed solution; the tetrabutyl titanate The molar ratio between ethylene glycol and ammonium sulfate is 1:59:19;

[0031] (2) Stir the mixed solution at room temperature for 30 minutes, control the pH value of the mixed solution to 2, after mixing evenly, place the mixed solution in a water bath at 80° C. to heat and keep it warm for 2 hours, and then stand and centrifuge to obtain a sample;

[0032] (3) The pH value of the sample was adjusted to neutral with dilute ammonia water, and then washed twice with distilled water. Finally, the sample was vacuum-dried at 60°C for 2 hours to obtain a white powder, which was nano anatase titanium dioxide.

[0033] The XRD, S...

Embodiment 3

[0042] A kind of one-step preparation method of nanometer anatase type titanium dioxide, comprises the following steps:

[0043] (1) Add the metered ethylene glycol, tetrabutyl titanate, and ammonium sulfate into containers filled with 0.1 to 0.2 mol / L dilute sulfuric acid in sequence, mix and dissolve to obtain a mixed solution; the tetrabutyl titanate The molar ratio between ethylene glycol and ammonium sulfate is 1:68:21;

[0044](2) Stir the mixed solution at room temperature for 40 minutes, control the pH value of the mixed solution to 1, after mixing evenly, place the mixed solution in a water bath at 90° C. to heat and keep it warm for 1 hour, and then stand and centrifuge to obtain a sample;

[0045] (3) Adjust the pH value of the sample to neutral with dilute ammonia water, wash it twice with distilled water, and finally vacuum-dry the sample at 80° C. for 1.5 h to obtain a white powder, which is nano-anatase titanium dioxide.

[0046] The appearance of the nanoparti...

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Abstract

The invention provides a one-step preparation method of nano anatase type titanium dioxide. The one-step preparation method comprises the following steps: firstly, sequentially adding metered ethyleneglycol, tetrabutyl titanate and ammonium sulfate into 0.1 to 0.2mol / L dilute sulfuric acid respectively and dissolving to obtain a mixed solution, wherein the mol ratio of tetrabutyl titanate to ethylene glycol to ammonium sulfate is 1 to (50 to 68) to (16 to 21); stirring the mixed solution at room temperature for 20 to 40min; controlling the pH (Potential of Hydrogen) value of the mixed solution to be 1 to 3; after uniformly mixing, putting the mixed solution into a water bath at 75 to 90 DEG C and heating and keeping heat for 1 to 5h; standing and centrifuging to obtain a sample; adjustingthe pH value of the sample to be neutral and then washing for two times; drying the sample at 40 to 80 DEG C in vacuum for 1.5 to 2.5h to obtain the nano anatase type titanium dioxide. The method provided by the invention has the advantages of simple technology, few influence factors and easiness for controlling reaction; in a preparation process, a titanium source is stable and is not easy to degrade; preparation temperature is low and time is short; subsequent calcination is not needed and secondary agglomeration of particles can be avoided.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a one-step preparation method of nanometer anatase titanium dioxide. Background technique [0002] Nano-titanium dioxide is a new type of inorganic material with a particle size of 10nm to 50nm. It has small particle size, large specific surface area, strong magnetism, photocatalysis, good absorption performance, strong ability to absorb ultraviolet rays, high surface activity, and good thermal conductivity. It has the advantages of good dispersion, stable suspension, non-toxic to human body, and low price, so it stands out among photocatalysts. Its application fields have been in the degradation of organic wastewater, the reduction of heavy metal ions, air purification, sterilization, and anti-fog. And many other aspects. Due to its unique properties and wide range of uses, nano-titanium dioxide has been highly valued by the scientific community at home ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053B82Y40/00
CPCB82Y40/00C01G23/053C01P2002/72C01P2002/80C01P2004/03C01P2004/04C01P2004/32C01P2006/17C01P2006/80
Inventor 魏超强颖怀应鹏展朱磊陈辉
Owner CHINA UNIV OF MINING & TECH