Nanometer TiO2 coating structure, preparation method and uses thereof

A nano-coating technology, applied in the direction of catalyst activation/preparation, coating, chemical instruments and methods, etc., can solve the problems of easy dry cracking, low quantum efficiency, easy to fall off, etc.

Active Publication Date: 2017-04-26
BEIJING HUATAI TECH CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0011] Nano-TiO prepared by the above-mentioned sol-gel method 2 Photocatalysts have the advantages of small particle size, easy control of the reaction, and few side reactions, but the disadvantage is that the formed TiO 2 The coating has a non-porous structure and a small specific surface area; in addition, the TiO prepared by the sol-gel method 2 The coating is easy to dry and crack during the drying process, which objectively limits the thickness of the coating and the limited loading capacity, resulting in low quantum efficiency and poor catalytic activity. The purification speed of air and sewage is relatively slow, which cannot meet the requirements of practical applications. need; at the same time, the TiO prepared by the gel-sol method 2 The bonding force between the coating and the substrate is also relatively weak, and it is easy to fall off, which affects the actual use effect

Method used

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  • Nanometer TiO2 coating structure, preparation method and uses thereof
  • Nanometer TiO2 coating structure, preparation method and uses thereof
  • Nanometer TiO2 coating structure, preparation method and uses thereof

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preparation example Construction

[0049] In the preparation of nanometer TiO of the present invention 2 In the coating structure method, the linear titanyl polymer described in step 1) is a linear titanyl polymer with repeated Ti-O bonds as the main chain and organic groups connected to the side groups, which includes the following Structural units:

[0050]

[0051] where R 1 are independently selected from -C 2 h 5 ,-C 3 h 7 ,-C 4 h 9 ,-C 5 h 11 ; 2 stands for OR 1 Or represent selected from CH 3 COCHCOCH 3 and CH 3 COCHCOOC 2 h 5 The complexing group; the condition is based on R 2 total amount of groups, at least 50% of R 2 The group represents the complexing group; the number-average molecular weight Mn of the titanium oxide polymer measured by the vapor pressure osmosis method is 2000 to 3000; the pure titanium oxide polymer without solvent has a softening point, and the softening point measured by the ring and ball method is The point range is 90-127°C.

[0052] Preferably, the line...

Embodiment 1

[0085] Embodiment 1: the preparation of linear titanium oxide polymer

[0086]1) Add 1 mol of tetraisobutyl titanate into the reaction vessel, adjust the temperature to 50°C, add 0.8mol of acetylacetone, heat and stir at 50°C for 1 hour;

[0087] 2) Adjust the temperature to 80°C, add dropwise a mixed solution of 0.8mol water and 2.5mol isobutanol, continue heating and stirring at 80°C for 2 hours after dropping, and remove the solvent under reduced pressure after dropping the temperature to obtain a yellow titanyl polymer.

[0088] The softening point measured by the ring and ball method was 92° C., and the number average molecular weight Mn=2750 was measured by the vapor pressure osmosis method.

[0089] Grind 1-2 mg of the obtained yellow titanyl oxide polymer and 200 mg of pure KBr evenly, place it in a mold, and press it into a transparent sheet on a tablet machine for IR spectrum characterization, see Picture 1-1 ;exist Picture 1-1 Medium, 2959cm -1 、2922cm -1 、2872c...

Embodiment 2

[0091] Embodiment 2: the preparation of linear titanium oxide polymer

[0092] 1) Add 1 mol of tetrabutyl titanate into the reaction vessel, add 0.5 mol of acetylacetone, and heat and stir at 90° C. for 1.5 h;

[0093] 2) Adjust the temperature to 70° C., drop in a mixture of 1.2 mol of water and 6 mol of n-butanol, stir at 100° C. for 2.5 hours after dropping, and remove the solvent under reduced pressure after cooling down to obtain the titanium oxide polymer.

[0094] The softening point measured by the ring and ball method is 98° C., and the number average molecular weight Mn=2930 is measured by the vapor pressure osmosis method.

[0095] Grind 1-2 mg of the obtained titanyl polymer and 200 mg of pure KBr evenly, place it in a mold, and press it into a transparent sheet on a tablet machine for IR spectrum characterization, see diagram 2-1 ;

[0096] The resulting titanyl polymer was dissolved in deuterated chloroform for NMR characterization, the results are shown in ...

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Abstract

The present invention provides a nanometer TiO2 coating structure, which comprises a substrate and a nanometer TiO2 coating supported on the substrate surface. The invention further provides a preparation method of the nanometer TiO2 coating structure, wherein the substrate material is coated with a linear titanium oxygen polymer solution, and drying and sintering are performed to obtain the coating structure with the nanometer TiO2 loaded on the substrate material. According to the present invention, the nanometer TiO2 coating structure prepared from the linear titanium oxygen polymer has advantages of excellent photocatalytic effect and super-hydrophilic effect, such that the nanometer TiO2 coating structure has wide application prospects in the fields of air purification, water treatment, deodorization, antibacterial treatment, antifouling treatment, self-cleaning, and the like.

Description

technical field [0001] The present invention relates to TiO 2 The field of photocatalysts, specifically related to nano-TiO 2 Coating structure and its preparation method and use. Background technique [0002] In recent years, with the acceleration of the global industrialization process, the problem of environmental pollution has become increasingly serious. Environmental governance has been widely valued by governments and the general public around the world. Among them, the government has invested huge manpower, material and financial resources in environmental governance. Provide support for the research and industrialization of environmental purification technology, among which photocatalytic materials and photocatalytic technology are particularly important. The photocatalysts that scholars have researched and developed so far include TiO 2 , ZnO, WO 3 , CdS, ZnS, SnO 2 , Fe 3 o 4 etc., where TiO 2 It has many advantages such as high activity, good stability, n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/02B01J21/06B01J23/755B01J29/00C03C17/27
CPCB01J21/063B01J23/755B01J29/00B01J35/004B01J35/006B01J37/0219B01J37/0228B01J2229/18C03C17/27C03C2217/212
Inventor 李宇展白安洋王华范江峰
Owner BEIJING HUATAI TECH CO LTD
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