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Method for synthesizing anatase titanium dioxide based on eutectic solvent

A low eutectic solvent, titanium dioxide technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of difficult removal of surfactants, complex synthesis of ionic liquids, and poor environmental friendliness, etc. Achieving the effect of uniform shape, size and space distribution, environment-friendly synthesis and low cost

Pending Publication Date: 2022-08-05
SOUTHWEST PETROLEUM UNIV
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  • Description
  • Claims
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Problems solved by technology

in TiO 2 In the synthesis, in order to improve the photocatalytic efficiency, the research and development of TiO with high specific surface area 2 materials, ionic liquids or surfactants are often used as templates, but due to the difficulty of removing surfactants, complex synthesis of ionic liquids, poor environmental friendliness, and high prices, their application in TiO 2 Applications in the field of technology

Method used

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  • Method for synthesizing anatase titanium dioxide based on eutectic solvent
  • Method for synthesizing anatase titanium dioxide based on eutectic solvent
  • Method for synthesizing anatase titanium dioxide based on eutectic solvent

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specific Embodiment approach

[0026] The specific embodiment of the present invention includes the following steps:

[0027] S1. Disperse the titanium precursor in the first absolute ethanol to form A solution;

[0028] S2, mixing deep eutectic solvent with halogen compound, second absolute ethanol, deionized water and nitric acid to form B solution;

[0029] S3, dropping the B solution obtained in step S2 into the A solution obtained in step S1, and obtaining titanium dioxide white gel after aging;

[0030] S4, drying the titanium dioxide white gel obtained in step S3 to obtain titanium dioxide particles;

[0031] S5. The above-mentioned dried titanium dioxide particles are ground and then calcined to obtain anatase titanium dioxide.

[0032] Wherein, in step S1, the precursor of titanium is tetrabutyl titanate.

[0033] Wherein, in step S1, in molar ratio, the precursor of titanium: the first absolute ethanol=1: (20-28).

[0034] Wherein, in step S2, the deep eutectic solvent is a combination of a hy...

Embodiment 1

[0044] S1. Disperse 1.7 mL of tetrabutyl titanate in 6.8 mL of absolute ethanol to form A solution;

[0045] S2. Mix the deep eutectic solvent with 2.34 g of sodium chloride, 1.7 mL of absolute ethanol, 1.7 mL of deionized water and 0.01 mL of nitric acid to form solution B; wherein the molar ratio of the deep eutectic solvent to tetrabutyl titanate is 2:1, the preparation method of the deep eutectic solvent is as follows: choline chloride and ethylene glycol are mixed according to a molar ratio of 1:2, then, heated to 60 ° C, and stirred for 2h;

[0046] S3. B solution was added dropwise to A solution at a rate of 3 mL / min, and a white gel was obtained after aging for 3 h;

[0047] S4. Dry the white titanium dioxide gel in an oven at 80°C for 24 hours; obtain titanium dioxide particles;

[0048] S5. After grinding the dried titanium dioxide particles, put them into a muffle furnace and calcinate at 400° C. for 2 hours to obtain anatase titanium dioxide.

Embodiment 2

[0050] S1. Disperse 1.7 mL of tetrabutyl titanate in 6.8 mL of absolute ethanol to form A solution;

[0051] S2. Mix the deep eutectic solvent with 4.12 g of sodium bromide, 1.7 mL of absolute ethanol, 1.7 mL of deionized water and 0.01 mL of nitric acid to form solution B; wherein the molar ratio of the deep eutectic solvent to tetrabutyl titanate is 3:1, the preparation method of the deep eutectic solvent is as follows: tetrabutylammonium bromide and ethylene glycol are mixed according to a molar ratio of 1:2, then, heated to 60 ° C, and stirred for 2h;

[0052] S3. B solution was added dropwise to A solution at a rate of 3 mL / min, and a white gel was obtained after aging for 3 h;

[0053] S4. Dry the white titanium dioxide gel in an oven at 80°C for 24 hours; obtain titanium dioxide particles;

[0054]S5. After grinding the dried titanium dioxide particles, put them into a muffle furnace and calcinate at 400° C. for 2 hours to obtain anatase titanium dioxide.

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Abstract

The invention relates to the technical field of semiconductor photocatalytic material preparation, and provides a method for synthesizing anatase titanium dioxide based on a deep eutectic solvent, which comprises the following steps: S1, dispersing a titanium precursor in first absolute ethyl alcohol to form a solution A; s2, mixing the eutectic solvent with a halogen compound, second absolute ethyl alcohol, deionized water and nitric acid to form a solution B; s3, dropwise adding the solution B obtained in the step S2 into the solution A obtained in the step S1, and aging to obtain titanium dioxide white gel; s4, drying the titanium dioxide white gel obtained in the step S3 to obtain titanium dioxide particles; and S5, grinding the dried titanium dioxide particles, and calcining to obtain the anatase titanium dioxide.

Description

technical field [0001] The invention relates to the technical field of semiconductor photocatalytic material preparation, in particular to a method for synthesizing anatase titanium dioxide based on a deep eutectic solvent. Background technique [0002] With the progress of society, the rapid development of industrialization and the advancement of human civilization, the use of existing resources to achieve national prosperity has become the key research object of scientific researchers. But in the process of development, it will also bring a series of pollution problems, such as air pollution, water pollution and soil pollution. Among them, water resources are the biggest rigid demand of human life, and water pollution has become a major focus and concern of various countries. In recent years, the discharge of wastewater from industrial production and daily life has an increasingly serious impact on the ecological environment. Among them, printing and dyeing wastewater con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/135C02F1/30B01J35/00C02F101/30
CPCB01J27/135C02F1/30C02F2101/308C02F2305/10B01J35/39Y02W10/37
Inventor 刘成文婕张连红张辉李爱蓉张国平李强胡程
Owner SOUTHWEST PETROLEUM UNIV
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