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A kind of preparation method of blue titanium dioxide

A titanium dioxide and blue technology, applied in the field of inorganic nano-photocatalytic materials, can solve problems such as poor stability, high cost, and complicated operation, and achieve the effects of low cost, simple preparation method, and convenient industrial production

Active Publication Date: 2020-08-14
CAPITAL NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problems of high cost, complicated operation and poor stability of the blue titanium dioxide preparation method in the prior art, and provide a blue titanium dioxide preparation method with simple operation and low cost

Method used

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  • A kind of preparation method of blue titanium dioxide
  • A kind of preparation method of blue titanium dioxide
  • A kind of preparation method of blue titanium dioxide

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Mix 5 mL of tetra-n-butyl titanate with 6.1 mL of trifluoroacetic acid in a molar ratio of 1:3 to obtain a mixture;

[0028] (2) Add the above mixture to 2.48g LiCl and 3.1g KCl molten salt and grind it evenly, then place it in a muffle furnace and calcinate at a high temperature of 400°C for 6h (see figure 1 );

[0029] (3) After cooling, wash with water to remove the molten salt to obtain blue titanium dioxide with a grain size of about 25nm (see figure 2 ). Its photocatalytic degradation efficiency of rhodamine B is higher than commercial titanium dioxide P25 (see Figure 5 ).

Embodiment 2

[0031] (1) Mix 5 mL of tetra-n-butyl titanate with 12.2 mL of trifluoroacetic acid in a molar ratio of 1:6 to obtain a mixture;

[0032] (2) Add the above mixture to 2.48g LiCl and 3.1g KCl molten salt and grind evenly, then place it in a muffle furnace and calcinate at a high temperature of 500°C for 6h;

[0033] (3) After cooling, wash with water to remove molten salt to obtain blue titanium dioxide, and its electron paramagnetic resonance spectrum shows that blue titanium dioxide contains a large amount of Ti 3+ (See image 3 ), illustrating that the preparation method of the present invention can obtain highly stable blue titanium dioxide. Its photocatalytic degradation efficiency of rhodamine B is higher than commercial titanium dioxide P25 (see Figure 5 ).

Embodiment 3

[0035] (1) Mix 5 mL of tetra-n-butyl titanate with 12.2 mL of trifluoroacetic acid in a molar ratio of 1:6 to obtain a mixture;

[0036] (2) Add the above mixture to 3.57g LiNO 3 and 5.76g KNO 3 Grind it evenly in molten salt, then place it in a muffle furnace and calcinate at 600°C for 3 hours;

[0037] (3) After cooling, wash with water to remove the molten salt to obtain blue titanium dioxide, and its X-ray photoelectron energy diagram shows that blue titanium dioxide contains Ti 3+ (See Figure 4 ), illustrating that the preparation method of the present invention can obtain blue titanium dioxide with good stability. The efficiency of its photocatalytic degradation of rhodamine B is better than that of commercial titanium dioxide P25 (see Figure 5 ).

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Abstract

The invention relates to a preparation method of blue titanium dioxide and belongs to the technical fields of chemistry and material science. In the present invention, a titanium source is mixed with a fluorine-containing organic compound and then calcined at high temperature in molten salt to produce highly stable blue titanium dioxide in one step. The method of the invention is simple, does not require inert gas protection, has high yield, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanometer photocatalytic materials, in particular to a preparation method of blue titanium dioxide. Background technique [0002] As a semiconductor material with excellent performance and stable chemical properties, titanium dioxide is widely used in photocatalysts, gas sensors, and solar cells, and has broad applications in the fields of energy and environmental protection. Titanium dioxide is usually white, and its forbidden band width is 3.2eV. It can only be excited by ultraviolet light in sunlight, and its photoconversion efficiency is low. Therefore, expanding the photoresponse range of titanium dioxide to the visible light range has become a hotspot in the field of titanium dioxide material research. [0003] Currently, techniques to expand the visible light response of titanium dioxide include metal / metalloid doping, dye sensitization, and Ti 3+ Self-doping method, through special tre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06C02F1/30C02F101/30
CPCC02F1/30B01J21/063C02F2101/308B01J35/39
Inventor 孟祥福邹钰杜梦凡杨凯萌蔡鑫鑫
Owner CAPITAL NORMAL UNIVERSITY
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