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Preparation method of halloysite nanotube/nanometer titania composite material

A technology of nano-titanium dioxide and halloysite nanotubes, applied in chemical instruments and methods, alkali metal compounds, physical/chemical process catalysts, etc., can solve problems such as high cost and pollution of reaction waste liquid, and achieve low production cost and environmental protection. The effect of less pollution and short production cycle

Inactive Publication Date: 2017-05-31
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The titanium dioxide prepared by this method is anatase type, with a particle size of about 5-15nm. Since this method uses organic matter as a solvent, the cost is high, and there is a certain safety risk under high temperature and high pressure environment, and the reaction waste liquid has certain pollution to the environment. to process

Method used

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  • Preparation method of halloysite nanotube/nanometer titania composite material
  • Preparation method of halloysite nanotube/nanometer titania composite material
  • Preparation method of halloysite nanotube/nanometer titania composite material

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Embodiment １

[0028] A preparation method of halloysite nanotube / nano titanium dioxide composite material. The preparation method described in this embodiment is:

[0029] Mix 15-25 parts by mass of halloysite after heat treatment, 100 parts by mass of deionized water and 1-6 parts by mass of alcohol dispersant, disperse evenly, and then add acid until 3≤pH value<7, to obtain slurry.

[0030] According to the mass ratio of titanium dioxide: halloysite (1~2): 10, add titanium-containing materials into the slurry, disperse evenly, and obtain mixture particles; React at 150°C for 6-10 hours; then wash with deionized water and dry to prepare the halloysite nanotube / nano-titanium dioxide composite material.

[0031] The heat-treated halloysite refers to heat-treating the halloysite at 200-400° C. for 0.5-2.5 hours to obtain the heat-treated halloysite.

[0032] The surfactant is cetyltrimethylammonium bromide.

[0033] The alcoholic dispersant is ethanol.

[0034] The titanium-containing ma...

Embodiment 2

[0037] A preparation method of halloysite nanotube / nano titanium dioxide composite material. Present embodiment except following material, all the other are with embodiment 1:

[0038] The titanium-containing material is a mixture of tetrabutyl titanate and tetraisopropyl titanate.

Embodiment 3

[0040] A preparation method of halloysite nanotube / nano titanium dioxide composite material. Present embodiment except following material, all the other are with embodiment 1:

[0041] The titanium-containing material is a mixture of tetrabutyl titanate and titanium tetrachloride.

[0042] The acid is nitric acid.

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Abstract

The invention relates to a preparation method of a halloysite nanotube / nanometer titania composite material. The technical scheme is that 15 to 60 mass parts of halloysite or halloysite subjected to heat treatment, 100 mass parts of deionized water, 0 to 2 mass parts of surfactants and 0 to 20 mass parts of alcohol type dispersants are uniformly mixed; acid is added until a pH value is greater than or equal to 3 and is smaller than 7, or alkali is added until the pH value is greater than 7 and is small than or equal to 10; slurry is prepared. A titanium-containing material is added into the slurry according to the mass ratio of titania to the halloysite of (1 to 5):10; uniform dispersion is performed; then, the dispersed mixed material is charged into a reaction kettle; reaction is performed for 6 to 24h under the condition of 100 to 220 DEG C; washing and drying are performed to prepare the halloysite nanotube / nanometer titania composite material. The preparation method has the advantages that the process is simple; the production cost is low; the environment-friendly effect is achieved; the scale production is easily realized. The halloysite nanotube / nanometer titania composite material prepared by the method has the advantages of large specific surface area, good adsorption performance and high photocatalysis efficiency.

Description

technical field [0001] The invention belongs to the technical field of halloysite nanocomposite materials. Specifically relates to a preparation method of halloysite nanotube / nano titanium dioxide composite material. Background technique [0002] Halloysite is a natural nano-clay mineral with nano-tubular structure, complete crystallization and large specific surface. It is homogeneous and multi-like with kaolinite. It is rich in resources, low in production cost and clean and pollution-free. Due to its special nanotube structure and large specific surface area, halloysite nanotubes have high adsorption properties and can be used to adsorb organic pollutants (such as dyes, pesticides, etc.), microorganisms, and heavy metal ions in liquids. It can also be used for reinforcement and toughening of composite materials, surface modification and carrier of high-efficiency catalysts, etc. [0003] Titanium dioxide has high ultraviolet photocatalytic activity, and is widely used i...

Claims

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Application Information

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IPC IPC(8): B01J21/16B01J20/12B01J20/28B01J20/30
CPCB01J20/06B01J20/12B01J20/28007B01J20/28026B01J21/16B01J35/40B01J35/39
Inventor 吴红丹王体珏张锦化杨伟峰黄蒋磊胡俊王天怡
Owner WUHAN UNIV OF SCI & TECH
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