Preparation method of non-high-temperature resistant base material loaded with controllable-crystal nano titanium dioxide on surface

A nano-titanium dioxide, substrate surface technology, applied in the direction of titanium dioxide, nanostructure manufacturing, titanium oxide/hydroxide, etc., can solve the problems of affecting effective contact, separation difficulty, substrate burning, etc., to achieve good bonding firmness, preparation The effect of simple process and low preparation cost

Inactive Publication Date: 2010-06-16
YANGZHOU UNIV
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Problems solved by technology

However, in the supported catalyst prepared by method (1), the nano-titanium dioxide and the substrate completely rely on physical adsorption, which is easy to fall off and is not suitable for repeated use; in the supported catalyst prepared by method (2), the chemical The substance has a coating effect on nano-titanium dioxide, which affects its effective contact with the catalytic object and affects the catalytic efficiency; although the supported catalyst prepared by method (3) does not have the problems of easy falling off and affecting catalytic efficiency in the above two methods, but High-temperature heat treatment is a necessary step to form crystalline titanium dioxide and improve the bonding firmness. Such high-temperature treatment is not suitable for non-high-temperature-resistant substrates. On the one hand, it will inevitably cause damage to the substrate itself, resulting in a decrease in its mechanical properties and affecting Durability, on the other hand improper handling control may cause the substrate to be burned
[0005] Chinese patents CN101110820037 and CN200510019601 both disclose methods for preparing titanium dioxide on the surface of glass fibers. The high-temperature heat treatment in the later stage is not suitable for non-high-temperature-resistant substrates, and the obtained titanium dioxide is limited to anatase type.
Chinese patents CN200510035311 and CN200610033109 disclose methods for preparing titanium dioxide on the surface of activated carbon fibers, using a heat treatment temperature of 150-850°C. Such high-temperature treatment will inevitably cause damage to the carbon fibers and a decrease in mechanical properties, and the obtained titanium dioxide is only sharp. Titanite type
Chinese patent CN200810053592 discloses a method for preparing nano-titanium dioxide powder with a controllable phase ratio of anatase and rutile. This method uses imidazolium salt ionic liquid as a template agent to obtain mixed crystal nano-titanium dioxide powder below 120 ° C. On the one hand, Powder titanium dioxide is difficult to separate during actual use, and the loss rate is high during separation. On the other hand, the use of templates will inevitably affect the application of this method in the preparation of supported nano-titanium dioxide photocatalysts. Material bonding ability and bonding firmness
Chinese patent CN200810040018 discloses a method for preparing highly stable neutral mixed crystal nano-TiO below 100°C 2 Hydrosol method, this method needs to adjust the pH of the reaction solution to 7 by adding lye to obtain nano-titanium dioxide, such a process cannot effectively prepare a supported catalyst
In addition, the adjustment of the mixed crystal composition of this method needs to be realized by adding metal salts, and it does not affect the TiO 2 The crystal composition of the

Method used

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  • Preparation method of non-high-temperature resistant base material loaded with controllable-crystal nano titanium dioxide on surface
  • Preparation method of non-high-temperature resistant base material loaded with controllable-crystal nano titanium dioxide on surface
  • Preparation method of non-high-temperature resistant base material loaded with controllable-crystal nano titanium dioxide on surface

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Add 2ml of pure water to 75ml of absolute ethanol system dissolved with 1ml of tetrabutyl titanate, stir for half an hour and let it stand, centrifuge or settle naturally to separate the white precipitate titanium hydroxide, wash it with water and ethanol for 1 Once, dry at 50°C. Weigh 180mg of dry white titanium hydroxide and mix with 18ml of pure water, stir at high speed for 10 minutes, add 20ml of 30% H 2 o 2 The precipitate was completely dissolved to obtain a treatment solution for loading.

[0032] Weigh 2.0g of carbon fiber, soak and wash with acetone (or acetone organic solvent or ethanol) and pure water for 5 minutes each, and place it in 68% HNO after drying 3 Oxidize at 50°C for 2.5 hours, take it out, wash with pure water to remove residual acid, and dry at 50°C. Immerse the obtained fiber in the above-mentioned treatment solution for loading, keep it warm at 88°C for 40 hours, take it out, wash it with pure water for 3 times, and dry it naturally or at ...

Embodiment 2

[0034] Add 2ml of pure water to 75ml of absolute ethanol system dissolved with 1ml of tetrabutyl titanate, stir for half an hour and let it stand, centrifuge or settle naturally to separate the white precipitate titanium hydroxide, wash it with water and ethanol for 1 Once, dry at 50°C. Weigh 100mg of dry white titanium hydroxide and mix with 10ml of pure water, stir at high speed for 10 minutes, add 12ml of 30% H 2 o 2 The precipitate was completely dissolved to obtain a treatment solution for loading.

[0035] Weigh 1.0g of carbon fiber, soak and wash it with acetone (or acetone organic solvent or ethanol) and pure water for 15 and 5 minutes respectively, dry it at 50°C and immerse it in the above-mentioned treatment solution for loading, and keep it at 85°C for 50 hours. Take it out, wash it with pure water three times, and dry it naturally or at 60°C. image 3 b is the XRD pattern of anatase and rutile mixed crystal nano-titanium dioxide obtained in Example 2.

Embodiment 3

[0037] Mix 1 mol / L sodium hydroxide solution with 0.8 mol / L titanyl sulfate solution, stir for half an hour and let it stand, centrifuge or settle naturally to separate the white precipitate titanium hydroxide, wash it twice with water, and bake at 50°C Dry. Weigh 50 mg of dry white titanium hydroxide and mix with 8 ml of pure water, stir at high speed for 10 minutes, add 10 ml of 30% H 2 o 2 The precipitate was completely dissolved to obtain a treatment solution for loading.

[0038] Take 20×20×1mm 3 2 pieces of polymethyl methacrylate sheets, soak and wash with acetone (or acetone organic solvent or ethanol) and pure water for 10 minutes in turn, and place them in 3mol / L sodium hydroxide solution at 50°C for 20 minutes after drying. After taking it out, wash it with pure water and dry it at 50°C. Immerse the treated polymethyl methacrylate sheet in the above treatment solution for loading, keep it warm at 80°C for 35 hours, take it out, wash it with pure water for 3 time...

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Abstract

The invention discloses a preparation method of a non-high-temperature resistant base material loaded with controllable-crystal nano titanium dioxide on surface, which belongs to the technical field of material preparation. The preparation method comprises the following steps: hydrolyzing or precipitating the titanium material by adding alkali to obtain titanium hydroxide, peptizing to obtain a treating fluid for loading, immersing the pretreated base material into the treating fluid for loading, carrying out reaction at 70-100 DEG C for 24-72 hours, cleaning, and drying to obtain the non-high-temperature resistant base material loaded with controllable-crystal nano titanium dioxide. The method has the advantages of simple preparation process and low requirements for equipment. The obtained material can be used for purifying air, degrading organic pollutants, shielding ultraviolet rays and the like.

Description

technical field [0001] The invention relates to a method in the technical field of material preparation, in particular to a preparation method for loading nano-sized titanium dioxide with controllable crystal form on the surface of non-high-temperature-resistant substrates such as fibers and plastics. Background technique [0002] With the development of science and technology and people's demand for high-quality material life, more and more materials and products based on chemical synthesis have entered people's lives. At the same time, a large amount of pollution is inevitably generated in their manufacturing process , leading to increasingly serious environmental pollution problems. [0003] Nano titanium dioxide (TiO 2 ) has high chemical activity because of its small nanometer size effect and large specific surface area. TiO 2 There are three crystal forms: anatase, rutile and brookite. For the first two crystal forms of TiO 2 There are many applications, anatase T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82B3/00
Inventor 张明王志峰陆高祥孙甲王昌如严长浩吴德峰
Owner YANGZHOU UNIV
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