Preparation method of core-shell composite material wrapped in titanium dioxide nanoparticle coating

A nanoparticle, titanium dioxide technology, applied in nanotechnology and other directions, can solve the problems of complex preparation method of silver-titanium dioxide nanocomposite materials, high requirements for synthesis conditions, high cost, etc., to achieve excellent photocatalytic properties and improve photocatalysis. The effect of improving the efficiency of solid-liquid separation

Inactive Publication Date: 2013-07-10
杨晓红
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Problems solved by technology

[0004] The above methods all focus on depositing or attaching silver nanoparticles on the surface of titanium dioxide nanoparticles. The preparation method of the silver-titania nanocomposite material formed in this way is complicated, requires high synthesis conditions, and the cost remains high. great inconvenience

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  • Preparation method of core-shell composite material wrapped in titanium dioxide nanoparticle coating
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  • Preparation method of core-shell composite material wrapped in titanium dioxide nanoparticle coating

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preparation example Construction

[0043] see figure 1 , the present invention provides a preparation method of a core-shell composite material wrapped with a titanium dioxide nanoparticle coating, which is suitable for wrapping a titanium dioxide nanocoating on the surface of different nanoparticle carriers (such as: noble metal nanoparticles, metal oxide nanoparticles , the method includes the following steps:

[0044] 1) Obtain an aqueous solution of nanoparticle carrier; the nanoparticle carrier can be metal (gold, platinum or palladium) or metal oxide (such as zinc oxide, iron oxide, cobalt oxide); the nanoparticle carrier can be prepared according to the existing chemical preparation process come, or directly carry out market purchases, because the present invention is directly selected, therefore, this preparation process is not described in detail, in order to illustrate the problem, the present invention is simply explained with metallic silver as example:

[0045] 1.1) Dissolve polyvinylpyrrolidone (...

Embodiment 1

[0063] Dissolve 0.05g of commercially available PVP in 10ml of ethylene glycol solution and stir vigorously until the solution is transparent. Add 0.025g of silver nitrate to 5ml of ethylene glycol solution and stir vigorously until the solution is completely mixed. Pour the above two solutions into a 25 ml reagent bottle and stir vigorously until the solution is completely mixed, and then put it into an autoclave and heat it at 180° C. for two hours, and the reaction solution turns from light yellow to brown. Silver nanoparticles were collected by centrifugation at 3000rpm, washed with deionized water and ethanol, and dispersed in an aqueous solution for subsequent use; 0.05ml of commercially available tetrabutoxytitanium was dissolved in 10ml of ethylene glycol, and stirred at room temperature for about 8 hours to form a mixed solution A. Disperse 3ml of 0.01M silver nanoparticle aqueous solution into 10ml of acetone and stir until uniform to form mixed solution B. Add 0.5...

Embodiment 2

[0065] Dissolve 0.03g of commercially available PVP in 10ml of ethylene glycol solution and stir vigorously until the solution is transparent. Add 0.03g of silver nitrate to 5ml of ethylene glycol solution and stir vigorously until the solution is completely mixed. Pour the above two solutions into a 25 ml reagent bottle and stir vigorously until the solution is completely mixed, and then put it into an autoclave and heat it at 180° C. for two hours, and the reaction solution turns from light yellow to brown. Silver nanoparticles were collected by centrifugation at 3000rpm, washed with deionized water and ethanol, and dispersed in an aqueous solution for subsequent use; 0.03ml of commercially available tetrabutoxytitanium was dissolved in 10ml of ethylene glycol, and stirred at room temperature for about 7 hours to form a mixed solution A. Disperse 5ml of 0.01M silver nanoparticle aqueous solution into 10ml of acetone, stir well until uniform, and form mixed solution B. Add ...

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Abstract

A preparation method of core-shell composite material wrapped in a titanium dioxide nanoparticle coating includes: firstly, acquiring nanoparticle carrier; and secondly, wrapping the surface of the metal or metal oxide nanoparticle carrier with a titanium dioxide nanoparticle coating. The second step includes dissolving titanium isobutoxide in glycol, mixing at room temperature for 4-8 hours to obtain titanium dioxide precursor mixed solution A, dispersing the nanoparticle carrier in acetone, mixing well to obtain even mixed solution B, adding the titanium dioxide precursor mixed solution A into the mixed solution B, allowing for obtained solution to stand at room temperature to form precipitate mixed solution, and subjecting the precipitate mixed solution to centrifugal separation, and heating in water bath at 80-100 DEG C. The preparation method of the core-shell composite material wrapped in the titanium dioxide nanoparticle coating allows for increasing of photocatalysis efficiency and is low in cost.

Description

technical field [0001] The invention belongs to the field of composite material synthesis, and relates to a method for preparing a composite material, in particular to a method for preparing a core-shell composite material wrapped with a titanium dioxide nanoparticle coating. Background technique [0002] As a photocatalyst, titanium dioxide has been widely used in sewage treatment and air pollution treatment because it can degrade organic dye molecules under ultraviolet light, and has the characteristics of strong oxidation, high stability, low cost and no pollution to the environment. and self-cleaning. However, the photocatalytic degradation efficiency of TiO is often constrained by factors such as low solar light absorption efficiency, low electron transport efficiency under photon excitation, and electron-hole recombination. In addition, due to the use of nano-scale titanium dioxide powder, it is difficult to achieve solid-liquid separation, recovery and reuse by filtr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F9/24B82Y40/00
Inventor 杨晓红蒋绪川余艾冰
Owner 杨晓红
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