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Preparation method of zinc oxide/titanium dioxide composite material with network structure

A nanocomposite material, titanium dioxide technology, applied in the field of preparation, can solve the problems of product shape, uncontrollable size, easy hard agglomeration of products, affecting photocatalytic activity, etc., to achieve convenient and simple product processing, improved performance, and repeatability strong effect

Inactive Publication Date: 2014-02-12
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the preparation process of the co-precipitation method, the precipitation process of the reactants is fast, the resulting product is prone to hard agglomeration, the product particle size is large, and the photocatalytic activity is affected; while the preparation process of the hydrothermal method and the deposition-precipitation method is cumbersome. ZnO / TiO2 composites with uncontrollable appearance and size and no network structure

Method used

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  • Preparation method of zinc oxide/titanium dioxide composite material with network structure
  • Preparation method of zinc oxide/titanium dioxide composite material with network structure
  • Preparation method of zinc oxide/titanium dioxide composite material with network structure

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Embodiment 1

[0031] The present invention adopts biological template method to prepare ZnO / TiO with network structure 2 Nanocomposite photocatalytic material, the specific steps are as follows:

[0032] (1) Preparation of biological template: wash the eggshell, peel off the outer membrane carefully, put the outer shell in an acid solution, remove the calcium carbonate shell, and the inner membrane will automatically fall off, take it out, wash it, soak it in normal saline, stand-by;

[0033] (2) Configure a certain concentration of zinc nitrate-ethanol solution (volume ratio is 1:3);

[0034] (3) Configure a certain concentration of tetra-n-butyl titanate-ethanol solution (volume ratio is 1:3);

[0035] (4) Take out the egg membrane in step (1), wash it with distilled water, and after drying, immerse it in the solutions of steps (2) and (3) respectively, after soaking for 4 hours, take it out, and let it dry naturally;

[0036] (5) Put the dried egg film into a muffle furnace for sinter...

Embodiment 2

[0039] (1) Preparation of biological template: wash the eggshell, peel off the outer membrane carefully, put the outer shell in an acid solution, remove the calcium carbonate shell, and the inner membrane will automatically fall off, take it out, wash it, soak it in normal saline, stand-by;

[0040] (2) Configure a certain concentration of zinc acetate zinc-ethanol solution (volume ratio is 2:1);

[0041] (3) Configure a certain concentration of tetra-n-butyl titanate-ethanol solution (volume ratio is 1:3);

[0042] (4) Take out the egg membrane in step (1), wash it with distilled water, and after drying, immerse it in the solutions of steps (2) and (3) respectively, after soaking for 4 hours, take it out, and let it dry naturally;

[0043] (5) Put the dried egg film into a muffle furnace for sintering, heat up to 550 °C at 2 °C / min, keep the temperature for 2 h, and cool to room temperature to obtain ZnO / TiO with a network structure 2 Nanocomposite photocatalytic materials....

Embodiment 3

[0045] (1) Preparation of biological template: wash the eggshell, peel off the outer membrane carefully, put the outer shell in an acid solution, remove the calcium carbonate shell, and the inner membrane will automatically fall off, take it out, wash it, soak it in normal saline, stand-by;

[0046] (2) Configure a certain concentration of zinc nitrate-ethanol solution (volume ratio is 1:1);

[0047] (3) Configure a certain concentration of titanium tetrachloride-ethanol solution (volume ratio is 1:3);

[0048] (4) Take out the egg membrane in step (1), wash it with distilled water, and after drying, immerse it in the solutions of steps (2) and (3) respectively, after soaking for 4 hours, take it out, and let it dry naturally;

[0049] (5) Put the dried egg film into a muffle furnace for sintering, heat up to 650 °C at 5 °C / min, keep the temperature for 2 h, and cool to room temperature to obtain ZnO / TiO with a network structure 2 Nanocomposite photocatalytic materials.

[...

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Abstract

The invention provides a preparation method of a zinc oxide / titanium dioxide composite material with a network structure. The method is characterized by comprising following steps: preparing a biological template; preparing a zinc-alcohol solution; preparing a butyl titanate-alcohol solution; taking out an egg-shell membrane dipped with normal saline, and dipping into the zinc-alcohol solution and the butyl titanate-alcohol solution separately for 4-12 h; putting the air dried egg-shell membrane into a muffle furnace for sintering at a sintering temperature of 550 DEG C to 700 DEG C with a temperature rising rate of 2 DEG C / min to 5 DEG C / min and a temperature maintaining time of 2-4 h; and cooling to room temperature to obtain the zinc oxide / titanium dioxide composite material with the network structure. According to the zinc oxide / titanium dioxide composite material with the network structure prepared by the simple biological template method, ZnO and TiO2 particles in the product has coupling and synergistic effects, thus enhancing and improving a gas-sensitive performance, a luminescence performance, photocatalysis, and other performances. In addition, interactions between the ZnO and the TiO2 can generate new physical phenomena and new functions can be utilized. The method has advantages of the easily available template, simple preparation technology and processes, low cost, strong repeatability, capability of synthesis in large scale, and the like.

Description

technical field [0001] The invention relates to a preparation method of a nanocomposite material, in particular to a preparation method of a zinc oxide titanium dioxide nanocomposite material with a network structure. Background technique [0002] Among the many nanometer metal oxides, zinc oxide (ZnO) is an important semiconductor material with a wide band gap (3.37eV) and high exciton binding energy (60meV), and it is non-toxic and low in price. Good environmental stability, used in sensors, photovoltaic materials, piezoelectric materials, cell labeling, protein detection, ultraviolet light detection, etc. Titanium dioxide (TiO2) has the same band gap as zinc oxide (E=3.2eV), and titanium dioxide also has the advantages of biocompatibility and good chemical stability. [0003] According to reports, ZnO and TiO2 nanoparticles in ZnO / TiO2 composites have coupling and synergistic effects, which can enhance and improve the properties of ZnO such as gas sensitivity, luminescen...

Claims

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Application Information

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IPC IPC(8): B01J23/06B01J35/04C02F1/30
Inventor 林琳赵斌陈超何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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