Preparation method and application of high-activity crystal face co-exposed anatase type TiO2 nanocrystal

An anatase-type, nanocrystalline technology, applied in chemical instruments and methods, titanium oxide/hydroxide, titanium dioxide, etc., can solve the problems of difficult to control the hydrolysis rate, difficult to mass production, high price, etc. The effect of UV performance, short production cycle and low synthesis cost

Pending Publication Date: 2021-06-25
JINZHONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the TiF used in the above preparation process 4 Expensive, and very easy to hydrolyze, it is difficult to control the hydrolysis rate; anatase TiO is prepared with layered titanate as precursor 2 Nanocrystals take a long time and require a large amount of precursor and strong corrosive reagent - concentrated hydrochloric acid, which makes it difficult to produce on a large scale

Method used

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  • Preparation method and application of high-activity crystal face co-exposed anatase type TiO2 nanocrystal
  • Preparation method and application of high-activity crystal face co-exposed anatase type TiO2 nanocrystal
  • Preparation method and application of high-activity crystal face co-exposed anatase type TiO2 nanocrystal

Examples

Experimental program
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Effect test

Embodiment 1

[0037] (1) Preparation of tetrabutyrate colloidal solution: 20 ml of absolute anhydrous ethanol in three reactions is drawn by pipettes, placed on a magnetic stirrer, and 20 ml of titanate titanate is added dropwise under stirring. (0.0584 mol, mass fraction 99.7%), 2 ml of egg white and 2 ml polyethylene glycol 600, mixed mixed, prepared 3 parts of a tetrabutyate colloid solution in a transparent titanate tetrabutyrate );

[0038] (2) Preparation of titanium dioxide hydrate: 3 parts of the tetrabutyrate colloidal solution prepared to step (1), add 2.0 ml of formic acid (0.0466 mol, mass fraction of 88.0%), acetic acid (0.0349 mol, mass fraction), respectively. 99.8%) and HF solution (0.0452 mol, mass fraction 40%), mixed with mixed, sealed, placed in a constant temperature blast drying tank at a set temperature of 180 ° C, heat reactive for 24 h, cooling to room temperature, will be taken out, The resulting product was filtered with a circulating water type vacuum pump and washed...

Embodiment 2

[0060] (1) Preparation of tetrabutyrate colloidal solution: 20 ml of absolute anhydrous ethanol in three reactions is drawn by pipettes, placed on a magnetic stirrer, and 20 ml of titanate titanate is added dropwise under stirring. (0.0584 mol, mass fraction 99.7%), 3 ml of egg white and 3 ml polyethylene glycol 600, mixed mixed, mixed mixed titanate colloidal solution (3 parts of the tetrabutyrate colloidal solution for the same method );

[0061] (2) Preparation of a titanium dioxide hydrate: 3 parts of the tetrabutyrate colloidal solution prepared from step (1), adding 1.0 ml of formic acid (0.0233 mol, mass fraction 88.0%), acetic acid (0.0175 mol, mass fraction 99.8%) and HF solution (0.0276 mol, mass fraction 40%), mixed with mixed, sealed, placed in a constant temperature blast drying tank at a set temperature of 150 ° C, heat reactive for 6 h, cooling to room temperature, will be removed The resulting product was filtered with a circulating water type vacuum pump and washe...

Embodiment 3

[0071] (1) Tetretic acid tetrabutyrate colloidal solution: 20 ml of absolute ethanol in three reactions was taken from the pipette, and 30 ml of tetrabutyl titanate was added dropwise on a magnetic agitator. (0.0876 mol, mass fraction 99.7%), 5 ml of egg white and 5 ml polyethylene glycol 600, mixed mixed, prepared 3 parts of a titanate tetrabutyl colloid solution in a transparent titanate tetrabutyrate );

[0072] (2) Preparation of a titanium dioxide hydrate: 7.5 ml of formic acid (0.1749 mol, mass fraction 88.0%), acetic acid (0.1309 mol, mass fraction) is added dropwise to the step (1). 99.8%) and HF solution (0.1694 mol, mass fraction 40%), mixed with mixed, sealed, placed in a constant temperature blast drying tank at a set temperature of 150 ° C, a solvent thermal reaction for 6 h, cooled to room temperature, will be taken out, The resulting product was filtered with a circulating water type vacuum pump and washed with a large amount of distilled water until the filtrate wa...

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Abstract

The invention provides a preparation method of a high-activity crystal face co-exposed anatase type TiO2 nanocrystal. The method comprises the following steps: by taking tetrabutyl titanate as a titanium source, absolute ethyl alcohol as a solvent and polyethylene glycol 600 as a dispersing agent, adding a morphology control agent which is formic acid, acetic acid or hydrofluoric acid, and synthesizing {101}/{111} crystal face co-exposed square shape and {101}/{010} crystal face co-exposed rhombus anatase type TiO2 nanocrystals throuigh a solvothermal method. The prepared anatase TiO2 nanocrystals are high in purity and uniform in particle size distribution, not only can effectively improve the degradation performance of organic dyes in wastewater discharged in the textile industry and the printing and dyeing industry, but also can improve the ultraviolet resistance of sunscreen cream, the photovoltaic performance of solar cells and the performance of sensors.

Description

Technical field [0001] The present invention belongs to the field of nanocrystalline material, and in particular, there is anatase TiO TiO, a highly exposed high-active crystal plane. 2 Preparation method and application of nanocrystals. Background technique [0002] In recent years, inorganic semiconductor nanoma materials with specific morphology and high-activity crystal surface exposed are widely concerned by researchers. Titanium dioxide (TiO) in various semiconductor materials 2 Examples of the most promising photocatalysts are considered to be one of the most promising photocatalysts as one of the advantages of biological and chemical inert, low-cost efficiency, and the long-term stability of photochemical etching, and the long-term stability of photochemical corrosion. . So TIO 2 It is widely used in the fields of photocatalysts, solar cells, ion lithium batteries, sensors. [0003] In nature, TIO 2 Mainly acute titanium mine (space group: i4 1 / AMD), rutile type (space ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053C02F1/30C02F101/30
CPCC01G23/053C02F1/30C01P2002/72C01P2004/03C01P2004/04C01P2006/40C02F2101/308C02F2305/10
Inventor 杜意恩牛宪军温广明
Owner JINZHONG UNIV
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