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Preparation method of zinc oxide/titanium dioxide nanometer composite material

A technology of nanocomposite materials and titanium dioxide, which is applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, bulk chemical production, etc., can solve the problems of serious agglomeration and inability to obtain dispersible nanocomposite powder materials, etc., and achieve good dispersion , good photoelectric performance and high crystallinity

Inactive Publication Date: 2014-05-21
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the drying process of this method, the water molecules adsorbed on the surface of adjacent particles and the OH groups on the hydrogen bonded surface form bridges and bonds with each other, and the degree of agglomeration between powders is serious, and nanocomposite powder materials with good dispersibility cannot be obtained.

Method used

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  • Preparation method of zinc oxide/titanium dioxide nanometer composite material
  • Preparation method of zinc oxide/titanium dioxide nanometer composite material
  • Preparation method of zinc oxide/titanium dioxide nanometer composite material

Examples

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Embodiment 1

[0029] The present invention adopts co-precipitation-supercritical fluid drying method to prepare ZnO / TiO 2 Nanocomposite materials, the specific process steps are as follows:

[0030] (1) Configure a certain concentration of zinc ion solution (0.005mol / L);

[0031] (2) Prepare a certain concentration of alkaline solution, wherein the amount of hydroxide ion: the amount of zinc ion = 2:1;

[0032] (3) Configure a certain concentration of ethylenediamine solution, wherein the amount of ethylenediamine: the amount of zinc ions = 2:1;

[0033] (4) During the stirring process, add the alkali solution and ethylenediamine to the zinc ion solution; after stirring for a certain period of time, add a certain amount of P25 titanium dioxide powder (Degussa P25 titanium dioxide, The ratio of rutile to anatase is 3:7, the average particle size is 30 nanometers) (addition amount is 10%);

[0034] (5) Stir for a certain period of time to make it evenly mixed, then put the suspension into ...

Embodiment 2

[0038] (1) Configure a certain concentration of zinc ion solution (0.008mol / L);

[0039] (2) Prepare a certain concentration of alkaline solution, wherein the amount of hydroxide ion: the amount of zinc ion = 2:1;

[0040] (3) Configure a certain concentration of ethylenediamine solution, wherein the amount of ethylenediamine: the amount of zinc ions = 2:1;

[0041] (4) During the stirring process, add the alkali solution and ethylenediamine to the zinc ion solution; after stirring for a certain period of time, add a certain amount of P25 titanium dioxide powder (Degussa P25 titanium dioxide, The ratio of rutile to anatase is 3:7, the average particle size is 30 nanometers) (addition amount is 10%);

[0042] (5) Stir for a certain period of time to make it evenly mixed, then put the suspension into a supercritical reactor-basket for reaction, the reaction conditions are: temperature 110°C, reaction time 8h, pressure 15MPa;

[0043] (6) After the reaction, the precipitated pr...

Embodiment 3

[0045] (1) Configure a certain concentration of zinc ion solution (0.008mol / L);

[0046] (2) Prepare a certain concentration of alkaline solution, wherein the amount of hydroxide ion: the amount of zinc ion = 2:1;

[0047] (3) Configure a certain concentration of ethylenediamine solution, wherein the amount of ethylenediamine: the amount of zinc ions = 2:1;

[0048] (4) During the stirring process, add the alkali solution and ethylenediamine to the zinc ion solution; after stirring for a certain period of time, add a certain amount of P25 titanium dioxide powder (Degussa P25 titanium dioxide, The ratio of rutile to anatase is 3:7, the average particle size is 30 nanometers) (addition amount is 20%);

[0049](5) Stir for a certain period of time to make it evenly mixed, then put the suspension into a supercritical reactor-basket for reaction, the reaction conditions are: temperature 120°C, reaction time 10h, pressure 15MPa;

[0050] (6) After the reaction, the precipitated pr...

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Abstract

The invention provides a preparation method of a zinc oxide / titanium dioxide nanometer composite material. The preparation method comprises the following steps: preparing a zinc ion solution, aqueous alkali and an ethidene diamine solution, and respectively adding the aqueous alkali and the ethidene diamine solution to the zinc ion solution in a stirring process; after stirring, adding P25 type titanium dioxide powder to the mixed solution; stirring and uniformly mixing, putting suspension liquid in a supercritical reactor basket, and reacting for 4-10 hours at the temperature of 100-130 DEG C and the pressure intensity of 12-18Mpa; after ending reaction, washing a precipitation product with deionized water, and then drying for 6-24 hours at the temperature of 60-100 DEG C, thus obtaining the zinc oxide / titanium dioxide nanometer composite material. The ZnO / TiO2 composite material prepared by the method is high in output-input ratio and has the advantages of high degree of crystallinity, low cost, small clustering among powder, good dispersity and the like; the preparation method is simple.

Description

technical field [0001] The present invention relates to a preparation method of nanocomposite materials, in particular to a preparation method of zinc oxide / titanium dioxide nanocomposite materials, belonging to the field of preparation of composite nanomaterials 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. Environmental stability is good, precisely because of these excellent properties of zinc oxide, ZnO nano-semiconductor materials have been widely used in various fields: optoelectronic devices, sensors, photovoltaic materials, piezoelectric materials, cell labeling, protein detection, ultraviolet light detection, etc. [0003] Titanium dioxide (TiO 2 ) has the same band gap as ZnO (E=3.2eV), titanium dioxide also has the advantages of biocompatibility and good chemical stability. It i...

Claims

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Application Information

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IPC IPC(8): C01G9/02B82Y40/00
CPCY02P20/54
Inventor 林琳赵斌陈超曾琦琪何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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