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Two-dimensional-layered titanium-dioxide nanometer photocatalytic material and preparing method

A titanium dioxide, catalytic material technology, applied in the direction of titanium dioxide, catalyst activation/preparation, titanium oxide/hydroxide, etc., can solve the problems of electronic excitation conduction obstruction, inconspicuous layered structure, low photocatalytic efficiency, etc., to achieve easy regeneration. Recycling, good layered structure, good continuity

Active Publication Date: 2016-06-08
长春市铮徽机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Layered structure titanium dioxide has been synthesized and explored at home and abroad, but due to the different definitions of layers, the morphological characteristics are also different. Most of the synthesized layered sizes are too small, only about 10-20 nanometers, and the layered structure It is also not obvious, thus causing great hindrance to the excitation and conduction of electrons, and the photocatalytic efficiency is low

Method used

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  • Two-dimensional-layered titanium-dioxide nanometer photocatalytic material and preparing method
  • Two-dimensional-layered titanium-dioxide nanometer photocatalytic material and preparing method
  • Two-dimensional-layered titanium-dioxide nanometer photocatalytic material and preparing method

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Effect test

Embodiment 1

[0026] Add 0.5g of titanium dioxide hydrate and 30ml of 6M NaOH solution into a 30ml high-pressure reactor lined with polytetrafluoroethylene, keep at 150°C for 48 hours, take out the reactant, wash until neutral; then soak with 0.1M hydrochloric acid After 24 hours, use ion exchange to remove impurity ions inside; wash with deionized water until neutral; dry in an oven at 80°C; grind to obtain layered titanium dioxide hydrate (see figure 1 , XRD diagram see figure 2 ). The obtained titanium hydroxide was kept in a muffle furnace at 450° C. for 3 h and calcined, and after grinding, an anatase layered titanium dioxide photocatalyst could be obtained. Its transmission electron microscope pictures are shown in image 3 ; XRD figure see Figure 4 ; Photocatalytic curve see Figure 5 .

Embodiment 2

[0028] Add 0.5g of titanium dioxide hydrate and 30ml of 6M NaOH solution into a 30ml high-pressure reactor lined with polytetrafluoroethylene, keep at 150°C for 72h, take out the reactant, wash until neutral; then soak with 0.1M hydrochloric acid After 24 hours, use ion exchange to remove impurity ions inside; wash with deionized water until neutral; dry in an oven at 80°C; grind to obtain layered titanium hydroxide. The obtained titanium hydroxide was kept in a muffle furnace at 450° C. for 3 h and calcined, and after grinding, an anatase layered titanium dioxide photocatalyst could be obtained.

Embodiment 3

[0030] Take 0.5g of titanium dioxide hydrate and 30ml of 6M NaOH solution and add it to a 30ml high-pressure reactor lined with polytetrafluoroethylene, keep it at 150°C for 96h, take out the reactant, wash until neutral; then soak with 0.1M hydrochloric acid After 24 hours, use ion exchange to remove impurity ions inside; wash with deionized water until neutral; dry in an oven at 80°C; grind to obtain layered titanium hydroxide. The obtained titanium hydroxide was kept in a muffle furnace at 450° C. for 3 h and calcined, and after grinding, an anatase layered titanium dioxide photocatalyst could be obtained.

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Abstract

The invention relates to a two-dimensional-layered titanium-dioxide nanometer photocatalytic material, and meanwhile further provides a preparing method of the two-dimensional-layered titanium-dioxide nanometer photocatalytic material. The photocatalytic efficiency of prepared titanium dioxide is high, and the photocatalytic efficiency ranges from 79.4% to 93.1%. The preparing method is characterized in that a coprecipitation method is combined with a hydrothermal method; the experiment condition is mild and safe, the requirement for a device is low, and the reaction condition is easy to control; the obtained product is the two-dimensional-layered titanium-dioxide nanometer material, the layered structure and continuity are good, the defects caused by a small-size layer structure are greatly reduced, and the two-dimensional-layered titanium-dioxide nanometer material has the quite good promoting effect on electron transmission; a preparing reagent of the two-dimensional-layered titanium-dioxide photocatalytic material comprises titanous sulfate, sodium hydroxide and nitric acid. The reagent is easy to obtain, cost is low, the risk is low, pollution to the environment is quite small, secondary pollution can be avoided in the production process, and waste is easy to recycle.

Description

technical field [0001] The invention relates to a two-dimensional layered titanium dioxide nanometer photocatalytic material, and also provides a preparation method thereof. It belongs to the field of preparation of new structural materials, can be widely used in clean energy and pollutant treatment, and has a positive role in promoting the protection and improvement of the environment. Background technique [0002] In recent years, with the improvement of living standards, people have paid more and more attention to the environment. Environmentally friendly materials, pollution treatment materials, and new energy materials have received more and more attention. With the decrease of fossil energy and the increase of pollution, countries are actively looking for energy alternative materials and pollutant treatment materials. Titanium dioxide, as an environmentally friendly and inexpensive material, has become a popular photocatalyst and has shown great potential in dye-sensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J37/03B01J37/10C01G23/053
CPCC01G23/0532B01J21/063B01J37/03B01J37/10C01P2004/20C01P2004/04C01P2002/72C01P2004/62C01P2004/61B01J35/39
Inventor 梁书齐于开锋李义梁继才
Owner 长春市铮徽机械制造有限公司
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