Preparation method of water-dispersive ternary mixed-crystal nano titanium dioxide photocatalyst

A nano-titanium dioxide and photocatalyst technology, applied in the field of photocatalysis, can solve the problems of unspecified particle size and different surface properties, and achieve the effects of easy control of the synthesis process, high catalytic activity, and high photocatalytic activity.

Active Publication Date: 2017-01-04
浙江妙舍沁香科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

2. The surface properties and particle size of the formed product are completely different. The three-phase mixed crystal titanium dioxide obtained in the aforementioned patent cannot be dispersed as a precipitate in water, and the particle size is not specified; the three-phase mixed crystal titanium dioxide obtained by us has a particle size of 10 nanometers Hydrophilic titanium dioxide with hydroxyl and carbonyl groups on the left and right surfaces can be stably dispersed in water for a long time

Method used

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  • Preparation method of water-dispersive ternary mixed-crystal nano titanium dioxide photocatalyst
  • Preparation method of water-dispersive ternary mixed-crystal nano titanium dioxide photocatalyst
  • Preparation method of water-dispersive ternary mixed-crystal nano titanium dioxide photocatalyst

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Embodiment 1

[0034] 15ml of tetrabutyl titanate was mixed with 35ml of methanol, and 2ml of 37wt% acetic acid aqueous solution was added to obtain a titanium alkoxide solution. Mix 15ml of water with 15ml of methanol to obtain an aqueous alcohol solution. Under magnetic stirring, the alcoholic aqueous solution was added to the titanium alkoxide solution, and the mixed solution was poured into a reaction kettle, and left to stand for 5 minutes to obtain a gel. The reaction kettle was put into an oven at 150° C. for 8 hours to carry out the reaction. After natural cooling, centrifugation, washing, drying and grinding, a product with a particle size of about 12nm, containing 33.9% anatase, 60.6% brookite and 5.5% rutile, and water-dispersible was obtained.

Embodiment 2

[0036] 15ml of isopropyl titanate was mixed with 35ml of methanol, and 1.5ml of 37wt% hydrochloric acid was added to obtain a titanium alkoxide solution. Mix 15ml of water with 15ml of methanol to obtain an aqueous alcohol solution. Add the aqueous alcohol solution into the titanium alkoxide solution, mix evenly, pour it into the reaction kettle, and let it stand for 5 minutes to obtain a gel. The reaction kettle was put into an oven at 160° C. for 12 hours to carry out the reaction. After natural cooling, centrifugation, washing, drying and grinding, a product with a particle size of about 12nm, containing 33.0% anatase, 60.7% brookite and 6.3% rutile, and water-dispersible was obtained.

Embodiment 3

[0038] 20ml of isopropyl titanate was mixed with 30ml of methanol, and 2ml of 37wt% hydrochloric acid was added to obtain a titanium alkoxide solution. Mix 15ml of water with 15ml of methanol to obtain an aqueous alcohol solution. Add the aqueous alcohol solution into the titanium alkoxide solution, mix evenly, pour it into the reaction kettle, and let it stand for 3 minutes to obtain a gel. The reaction kettle was put into an oven at 160° C. for 12 hours to carry out the reaction. After natural cooling, centrifugation, washing, drying and grinding, a product with a particle size of about 12nm, containing 33.5% anatase, 59.3% brookite and 7.2% rutile, and water-dispersible was obtained.

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Abstract

The invention provides a preparation method of a water-dispersive ternary mixed-crystal nano titanium dioxide photocatalyst. The preparation method comprises the following steps of: adding a titanium precursor into an absolute alcohol solvent at a room temperature, and uniformly stirring to obtain a titanium precursor alcoholic solution; then adding an acid hydrolysis inhibitor into the obtained titanium precursor alcoholic solution, and uniformly stirring the acid hydrolysis inhibitor and the obtained titanium precursor alcoholic solution, thereby obtaining a mixed solution; adding alcohol aqueous solution into the obtained mixed solution, uniformly stirring the alcohol aqueous solution and the obtained mixed solution, and standing for 1-20 minutes, thereby obtaining a gel; performing solvent thermal reaction on the gel at a temperature of 140-200 DEG C for 2-24 hours, then naturally cooling the reactant mixture to room temperature, and performing centrifugalizing, washing, vacuum drying and grinding, thereby obtaining a target product. Due to adoption of synthesis process based on a one-pot method, the preparation method is high in productivity, low in energy consumption and free from pollution; the product can form a nano dispersion in water and has quite high catalytic activity on organic sewage under a condition of visible lights.

Description

[0001] (1) Technical field [0002] The invention belongs to the technical field of photocatalysis, and relates to a preparation method of anatase / brookite / rutile ternary mixed crystal structure nano-titanium dioxide with water dispersibility and high-efficiency visible light photocatalytic degradation of organic pollutants. [0003] (2) Background technology [0004] Nano-titanium dioxide photocatalyst can use sunlight to completely decompose organic pollutants into CO 2 and H 2 O and other small molecular substances, with the advantages of non-toxicity, good photochemical stability, and strong oxidation ability, have attracted much attention in the fields of photocatalysis, antibacterial, and organic pollutant degradation, and have been widely used in air purification, sewage treatment, coatings, etc. , cosmetics, photocells, etc. So far, people have done a lot of research on the synthesis method of titanium dioxide photocatalyst, and developed different synthesis methods, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06C01G23/053C02F1/30C02F101/30
CPCY02W10/37B01J21/063B01J35/004B01J35/023C01G23/053C01P2002/30C01P2004/64C02F1/30C02F2101/308C02F2305/10
Inventor 钱欣韩欢热袁烨陈玉龙周密
Owner 浙江妙舍沁香科技有限公司
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