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Preparation method of blue titanium dioxide particles

A titanium dioxide and particle technology, which is applied in the field of preparation of blue titanium dioxide particles, can solve the problems of unfavorable physical and chemical properties of TiO2, uneven particle surface, and many surface defects, and achieves good visible light response, short reaction time, and preparation. Efficient effect

Active Publication Date: 2020-05-19
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, TiO treated by this method 2 Surface, showing a disordered structure, and the surface has a large number of defects
Metal impurities will be introduced during the reduction process using metal vapor, which is important for TiO 2 The effect of physical and chemical properties is unfavorable
[0005] In summary, the titanium dioxide (TiO 2 ) particles have many surface defects, high and uncontrollable impurity content, and uneven particle surface

Method used

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  • Preparation method of blue titanium dioxide particles
  • Preparation method of blue titanium dioxide particles
  • Preparation method of blue titanium dioxide particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A TiO irradiated by fast laser 2 Particles, a method for preparing blue titanium dioxide particles with visible light response, the method comprising the steps of:

[0044] 1) In a muffle furnace, at 200 degrees Celsius, for TiO 2 Particles (particle size 100nm) are preheated to clean their surface;

[0045] 2) Step 1) TiO after preheating 2 The particles are tableted on the quartz glass substrate, and the surface flatness of the sample after tableting is guaranteed;

[0046] 3) Utilize the laser to treat the TiO after step 2) 2 The particles were irradiated for 5 seconds, and the parameters of the laser were selected as follows: pulse width 8 nanoseconds; wavelength 355nm; power 3W; frequency 1000Hz;

[0047] 4) Step 3) treated TiO 2 After the particles are remixed evenly, repeat step 2) and step 3) 6 times to obtain uniform blue TiO 2 particles.

[0048] After treatment by this method, TiO 2 The particles changed from white to uniform blue. Its surface grows ...

Embodiment 2

[0050] A TiO irradiated by fast laser 2 Particles, a method for preparing blue titanium dioxide particles with visible light response, the method comprising the steps of:

[0051] 1) In a muffle furnace, at 300 degrees Celsius, for TiO 2 Particles (particle size 25nm) are preheated to clean their surfaces;

[0052] 2) Step 1) TiO after preheating 2 The particles are tableted on the quartz glass substrate, and the surface flatness of the sample after tableting is guaranteed;

[0053] 3) Utilize the laser to treat the TiO after step 2) 2 The particles were irradiated for 3 seconds, and the parameters of the laser were selected as follows: pulse width 8 nanoseconds; wavelength 1700nm; power 1W; frequency 1000Hz;

[0054] 4) Step 3) treated TiO 2 After the particles are remixed evenly, repeat step 2) and step 3) 6 times to obtain uniform blue TiO 2 particles.

[0055] After treatment by this method, TiO 2 The particles changed from white to uniform blue. Several TiO cladd...

Embodiment 3

[0057] A TiO irradiated by fast laser 2 Particles, a method for preparing blue titanium dioxide particles with visible light response, the method comprising the steps of:

[0058] 1) In a muffle furnace, at 200 degrees Celsius, for TiO 2 Particles (with a particle size of 5000nm) are preheated to clean their surfaces;

[0059] 2) Step 1) TiO after preheating 2 The particles are tableted on the quartz glass substrate, and the surface flatness of the sample after tableting is guaranteed;

[0060] 3) Utilize the laser to treat the TiO after step 2) 2 The particles were irradiated for 10 seconds, and the parameters of the laser were selected as follows: pulse width 8 nanoseconds; wavelength 1064nm; power 5W; frequency 1000Hz;

[0061] 4) Step 3) treated TiO 2 After the particles are remixed evenly, repeat step 2) and step 3) 20 times to obtain uniform blue TiO 2 particles.

[0062] After treatment by this method, TiO 2 The particles changed from white to uniform blue. Sev...

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Abstract

The invention provides a preparation method of blue titanium dioxide particles. The method comprises the following steps: 1) removing surface impurities of TiO2 particles; 2) tabletting the TiO2 particles treated in the step 1), so that the surfaces of the tabletted TiO2 particles are flat; 3) irradiating the TiO2 particles treated in the step 2) for 3-10 seconds by using rapid laser with a pulsewidth of picoseconds or nanoseconds to obtain TiO2 particles with TiO films growing on the surfaces in situ; and 4) uniformly mixing the TiO2 particles treated in the step 3) again, and repeating thestep 2) and the step 3) until the whole TiO2 particles are uniform in blue color. According to the method, the preparation process is clean and free of pollution, the required single reaction time isextremely short and is only 3-10 seconds, and the preparation efficiency is high; the prepared blue titanium dioxide particles have good color stability in natural air and show good electrical transport performance, the photocurrent density is improved by about 3 times compared with that of the raw material TiO2, and the current impedance is obviously reduced.

Description

technical field [0001] The invention belongs to the field of nanomaterials and relates to a blue titanium dioxide (TiO2) with visible light response. 2 ) method for the preparation of particles. Background technique [0002] TiO 2 It is an important industrial inorganic raw material, widely used in coatings, plastics, papermaking, printing ink, chemical fiber, rubber, cosmetics and other industries. Especially as a dye, it has the best opacity, whiteness and brightness. It is considered to be a white pigment with the best performance, and its adhesion is strong, it is not easy to change chemically, and it has good stability in the air environment. Color durability. At the same time, TiO 2 It is also a kind of direct bandgap wide bandgap semiconductor material with excellent performance. Its bandgap width reaches 3.0-3.2eV, which can effectively absorb ultraviolet light. Pollutants, light-induced sterilization, and air purification are also widely used. However, TiO 2 ...

Claims

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Application Information

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IPC IPC(8): C01G23/047
CPCC01G23/047C01P2002/84C01P2004/01C01P2004/04C01P2006/40C01P2006/66
Inventor 陈小龙王达金士锋
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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