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Nanometer metal oxide and preparation method thereof

A nano-metal and oxide technology, applied in the field of dye manufacturing process and nano-inorganic compound photocatalytic material, can solve the problems of unstable production process, influence implementation and promotion, increase production cost, etc. Improve synthesis efficiency and accelerate the effect of synthesis

Inactive Publication Date: 2015-08-19
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are also some problems in the chemical sol-gel method: (1) The chemical sol-gel process takes a long time, usually several days or weeks; (2) The chemical synthesis method is used to gel the raw materials. In this process, the temperature has a great influence on the shape of the product, resulting in unstable production process; (3) The gelation process requires the use of a large amount of complexing agent, which increases the production cost
These problems have greatly affected the implementation and promotion of the method

Method used

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  • Nanometer metal oxide and preparation method thereof
  • Nanometer metal oxide and preparation method thereof
  • Nanometer metal oxide and preparation method thereof

Examples

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Effect test

Embodiment 1

[0036] Under normal temperature and pressure, according to the component ratio specified in Table 1, 4% aluminum nitrate (Al(NO 3 ) 3 ), 2% complexing agent citric acid, 10% sucrose, 5% glucose, 1% acrylamide, 0.2% bisacrylamide were dissolved in water and stirred to form a uniform solution. In this embodiment, the inorganic salt aluminum nitrate is selected as the aluminum ion provider, and citric acid is selected as the complexing agent. Pour the stirred solution into a container, put 60 The Co-γ irradiation field is irradiated with 5 kGy to 25 kGy to synthesize the initial hydrogel. The synthesized hydrogel was put into a drying oven and dried at 120°C for 24 hours to become a xerogel. Grind the xerogel into powder using a ball mill. Afterwards, put the powdered gel into a sintering furnace and sinter at a temperature range of 1200°C for 3 to 5 hours to obtain nano-Al 2 o 3 particles.

Embodiment 2

[0038] The gel synthesis steps, drying, grinding, and sintering methods in this example are the same as in Example 1, but the raw material components, component weight percentages, radiation sources for gel synthesis, radiation doses, and sintering temperatures are different. In this embodiment, the halides or salts containing metal ions are Y(NO 3 ) 3 ·6H 2 O and Mn(CH 3 COO) 2 4H 2 O, used as yttrium and manganese ion donors respectively, Y(NO 3 ) 3 ·6H 2 O and Mn(CH 3 COO) 2 4H 2 O weight ratio is 0.78:1; Select tartaric acid as complexing agent; Acids are nitric acid; 60 Co-γ-ray irradiation 5 kGy ~ 60 kGy, sintering furnace temperature is 800 ℃, sintering for 3 ~ 5 hours, and finally synthesized nanometer YMn 2 o 5 particles.

[0039] figure 1 It is the photo of this embodiment, which is the nanometer Ymn synthesized by this embodiment 2 o 5 Electron micrographs of the particles.

Embodiment 3

[0041] The gel synthesis steps, drying, grinding, and sintering methods in this example are the same as in Example 1, but the raw material components, component weight percentages, radiation sources for gel synthesis, radiation doses, and sintering temperatures are different. In this embodiment, the halides or salts containing metal ions are cobalt chloride (CoCl 2 ) and aluminum nitrite (Al(NO 2 ) 3 ), providing cobalt and aluminum ions respectively, the weight ratio of cobalt chloride and aluminum nitrite is 0.40:1; 60 Co-γ-ray irradiation 5 kGy ~ 35 kGy, the temperature range of sintering furnace is 300 ℃ ~ 600 ℃, sintering for 3 ~ 5 hours, and finally synthesize nano CoAl 2 o 4 particles, the nanoparticles can be used as excellent dyes.

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Abstract

The invention provides a nanometer metal oxide and a preparation method thereof, and belongs to the fields of preparation technologies of nanometer inorganic compound photocatalysis materials and dyes. A halide or inorganic salt containing metal ions is selected as a metal ion source, a complexing agent, sucrose, glucose, acrylamide, bisacrylamide, agar, gelatin and carboxymethyl cellulose are selected as gel raw materials, the metal ions are uniformly dispersed, an industrial irradiation device is used to irradiate a raw material solution or emulsion in order to form a gel with a spatial network structure, the nanometer metal oxide is prepared through later grinding and sintering technologies, and the nanometer metal oxide can be used as an excellent photocatalyst or dye. The preparation method has the advantages of simplicity, stable process, strong operability, great reduction of the use amount of the gel raw materials, no need of heating, no need of special treatment of the raw materials, and realization of large batch production by using the industrial irradiation device.

Description

technical field [0001] The invention relates to a nanometer metal oxide and a preparation method thereof, and belongs to the technical field of nanometer inorganic compound photocatalytic materials and dyestuff manufacturing techniques. Background technique [0002] Nanomaterials have unique quantum size effects, small size effects, surface effects and macroscopic quantum tunneling effects, and usually exhibit outstanding activity in catalytic reactions and dye printing and dyeing. In recent years, due to the excellent performance of metal oxide nano-photocatalysts and dyes, the application in environmental treatment and printing and dyeing has attracted more and more attention. The traditional methods for preparing nano-photocatalysts and dyes mainly include chemical sol-gel method, hydrolysis precipitation method, solid-phase method, hydrothermal synthesis method, microemulsion method, etc. Among them, the preparation process of chemical sol-gel method is relatively simple...

Claims

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Application Information

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IPC IPC(8): C01B13/14
Inventor 杨桂霞王仕发庞元龙安友曾凡松李闯刘许强曾光李晓燕
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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