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TiO2 nano material, and preparation method and application thereof

A technology of nanomaterials and mixed materials, applied in the field of its preparation, TiO2 nanomaterials, can solve the problems of decreased dispersibility, loss of economic benefits and performance, complicated synthesis steps, etc. Effect

Pending Publication Date: 2021-05-07
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis steps of this scheme are a bit cumbersome, and the dispersibility of the sample after high-temperature calcination in the water phase will decrease, which will lose the economic benefits and performance of the product in practical application.

Method used

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  • TiO2 nano material, and preparation method and application thereof
  • TiO2 nano material, and preparation method and application thereof
  • TiO2 nano material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Add 4 mL of concentrated hydrochloric acid solution into 7 mL of deionized water, stir evenly to form a dilute hydrochloric acid solution, and add 1 mL of 3mol / L TiCl drop by drop while stirring 4 Solution, continue to stir evenly, obtain mixed material, in described mixed material, hydrochloric acid (HCl) concentration is 4.02mol / L, TiCl 4 The concentration is 0.25mol / L;

[0055] (2) Add 0.1mL of 30wt% commercially available hydrogen peroxide drop by drop to the mixed material in step (1) while stirring, and continue to stir evenly to obtain an orange-red precursor;

[0056] (3) Move the precursor in step (2) to a 100mL polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at 180°C for 8 hours to obtain a white emulsion;

[0057] (4) After the reaction is completed, the white emulsion obtained in step (3) is washed 3 times with ethanol, then washed 3 times with water, and dried at 80° C. to obtain TiO 2 nanomaterials, the TiO 2 The nanomaterial is...

Embodiment 2

[0062] (1) Add 4mL concentrated hydrochloric acid solution into 19mL deionized water, stir evenly to form a dilute hydrochloric acid solution, add 1mL 3mol / L TiCl dropwise while stirring 4 solution, continue to stir evenly to obtain a mixed material, and in the mixed material, the concentration of hydrochloric acid is 2.0mol / L, TiCl 4 The concentration is 0.13mol / L;

[0063] (2) Add 0.05mL 30wt% commercially available hydrogen peroxide dropwise to the mixed material in step (1) while stirring, and continue to stir evenly to obtain an orange-red precursor;

[0064] (3) Move the precursor in step (2) to a 100mL polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at 220°C for 8 hours to obtain a white emulsion;

[0065] (4) After the reaction is completed, the white emulsion obtained in step (3) is washed 3 times with ethanol, then washed 3 times with water, and dried at 80° C. to obtain TiO 2 nanomaterials, the TiO 2 The nanomaterial is rutile type, and has r...

Embodiment 3

[0067] (1) Add 5mL concentrated hydrochloric acid solution into 6mL deionized water, stir evenly to form a dilute hydrochloric acid solution, add 1mL 3mol / L TiCl drop by drop while stirring 4 Solution, continue to stir evenly, obtain mixed material, in described mixed material, hydrochloric acid concentration is 5.03mol / L, TiCl 4 The concentration is 0.25mol / L;

[0068] (2) Add 0.1mL of 30wt% commercially available hydrogen peroxide drop by drop to the mixed material in step (1) while stirring, and continue to stir evenly to obtain an orange-red precursor;

[0069] (3) Move the precursor in step (2) to a 100mL polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at 180°C for 12 hours to obtain a white emulsion;

[0070] (4) After the reaction is completed, the white emulsion obtained in step (3) is washed 3 times with ethanol, then washed 3 times with water, and dried at 80° C. to obtain TiO 2 nanomaterials, the TiO 2 The nanomaterial is of the rutile type. ...

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Abstract

The invention relates to a TiO2 nano material as well as a preparation method and an application thereof. The preparation method of the TiO2 nano material comprises the following steps: (1) mixing water, a hydrochloric acid solution and a titanium chloride aqueous solution to obtain a mixed material; (2) mixing the mixed material with hydrogen peroxide to obtain a reaction precursor; and (3) carrying out hydrothermal reaction on the reaction precursor to obtain the TiO2 nano material. The TiO2 nano material is rutile type, has the advantages of uniform size, good monodispersity, good crystallinity and high product purity, has high photocatalytic activity under ultraviolet light and sunlight, and can effectively degrade organic dye and produce hydrogen through photolysis of water. The preparation method disclosed by the invention is simple to operate, environment-friendly, mild in reaction condition, low in energy consumption and more beneficial to practical application.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic nanomaterials, in particular to a TiO 2 Nanomaterials, their preparation methods and uses. Background technique [0002] Nano-TiO 2 It is the hotspot of current research, and together with other nanomaterials is known as "the most promising material in the 21st century". Nano-TiO 2 It has strong ability to absorb and scatter ultraviolet rays, making it an excellent ultraviolet shielding agent, which can be used in sunscreen skin care products, coatings and other fields. Nano-TiO 2 It has high photocatalytic activity and has important application value in the fields of environmental pollutant degradation and antibacterial self-cleaning. Nano-TiO 2 It also has photoelectric conversion performance and can be used as a photoelectric cell material, showing great application potential in solar energy conversion. [0003] TiO with different crystal forms 2 Nanoparticles exhibit u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B01J21/06B82Y30/00B82Y40/00
CPCC01G23/0536B82Y30/00B82Y40/00B01J21/063C01P2004/52C01P2004/03C01P2002/72C01P2004/64C01P2004/32C01P2004/38C01P2004/16B01J35/39
Inventor 朴玲钰伏兵吴志娇曹爽郭凯
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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