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A method for preparing strontium niobate/strontium carbonate composite nanomaterial

A composite nanomaterial and nanomaterial technology, applied in the field of functional material preparation, can solve problems such as high solid-phase reaction temperature, and achieve the effects of improving efficiency, simple operation and good repeatability

Inactive Publication Date: 2020-11-06
BEIJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since niobium oxide often shows chemical inertness and relatively stable properties, the synthesis of strontium niobate is mostly based on solid-phase synthesis, which often requires a higher solid-state reaction temperature, so it is necessary to find a mild preparation method to obtain strontium niobate

Method used

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  • A method for preparing strontium niobate/strontium carbonate composite nanomaterial
  • A method for preparing strontium niobate/strontium carbonate composite nanomaterial
  • A method for preparing strontium niobate/strontium carbonate composite nanomaterial

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Embodiment 1

[0031] This embodiment provides a method for preparing strontium niobate / strontium carbonate composite nanomaterial, comprising the following steps:

[0032] (1) 0.2g SnNb 2 o 6 Disperse the nanosheets in 10mL deionized water, add 0.9g potassium hydroxide and 0.2g strontium hydroxide to make a paste;

[0033] (2) With the pasty mixture that step (1) obtains as reaction precursor, in containing CO 2 (input is 0.2m 3 / h, from the beginning of heat treatment, maintain the airtight reactor (volume is 20mL) of importing 4h) and carry out heat treatment, temperature is 180 ℃, and the time is 24h, promptly obtains described strontium niobate / strontium carbonate (SrNb 2 o 6 / SrCO 3 ) composite nanomaterials.

[0034] figure 1 For the SrNb prepared in this embodiment 2 o 6 / SrCO 3 X-ray diffraction patterns of composite nanomaterials.

[0035] figure 2 and image 3 Respectively for the SrNb prepared in this example 2 o 6 / SrCO 3 Low-magnification and high-magnification...

Embodiment 2

[0038] This embodiment provides a method for preparing strontium niobate / strontium carbonate composite nanomaterial, comprising the following steps:

[0039] (1) 0.1g SnNb 2 o 6 Disperse the nanosheets in 10mL deionized water, add 0.4g potassium hydroxide and 0.8g strontium hydroxide to make a paste;

[0040] (2) With the pasty mixture that step (1) obtains as reaction precursor, in containing CO 2(input is 0.2m 3 / h, from the beginning of the heat treatment, maintain the heat treatment in the airtight reactor (volume is 20mL) of input 2h), the temperature is 200 ℃, and the time is 12h, promptly obtains described strontium niobate / strontium carbonate (SrNb 2 o 6 / SrCO 3 ) composite nanomaterials.

Embodiment 3

[0042] This embodiment provides a method for preparing strontium niobate / strontium carbonate composite nanomaterial, comprising the following steps:

[0043] (1) 0.2g SnNb 2 o 6 Disperse the nanosheets in 10mL deionized water, add 0.6g potassium hydroxide and 0.5g strontium hydroxide to make a paste;

[0044] (2) With the pasty mixture that step (1) obtains as reaction precursor, in containing CO 2 (input is 0.2m 3 / h, from the beginning of the heat treatment, maintain the heat treatment in the airtight reactor (capacity is 20mL) of input 1h), the temperature is 180 ℃, and the time is 12h, promptly obtains described strontium niobate / strontium carbonate (SrNb 2 o 6 / SrCO 3 ) composite nanomaterials.

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Abstract

The invention provides a method for preparing a SrNb2O6 (strontium niobate) / SrCO3 (strontium carbonate) composite nanometer material. The method comprises the following steps of using a SnNb2O6 nanometer material as a raw material; performing hydrothermal reaction in a mixed alkaline solution of potassium hydroxide and strontium hydroxide under the condition of existence of CO2 (carbon dioxide). The method provided by the invention has the advantages that the repeatability is good, the operation is simple, and the method is suitable for quantity production; the cost is greatly reduced, and theefficiency is improved. The prepared strontium niobate / strontium carbonate composite nanometer material has the advantages that the quality is stable; a better application prospect is realized in thefield of photocatalytic water treatment; the development of semi-stable state niobate crystallizing method is promoted, and the practical application study of the niobate is promoted.

Description

technical field [0001] The invention relates to the field of preparation of functional materials, in particular to a method for preparing strontium niobate / strontium carbonate composite nanomaterials. Background technique [0002] At present, finding new two-dimensional nanomaterials is of great significance in the field of nanodevices and photocatalysis, which is attributed to the fact that two-dimensional nanomaterials have a nanoscale thickness, have a good small size effect, and facilitate the transport of photogenerated carriers. . [0003] Strontium niobate is a new type of photocatalytic material, which has great application potential in the fields of gas sensing, catalysis, and optics. However, since niobium oxide often shows chemical inertness and relatively stable properties, the synthesis of strontium niobate is mostly based on solid-phase synthesis, which often requires a higher solid-state reaction temperature, so it is necessary to find a mild preparation meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G35/00C01F11/18B01J35/00B01J27/232
CPCB01J27/232B01J35/004C01F11/187C01G35/00C01P2002/72C01P2004/03
Inventor 杜玉成靳翠鑫侯瑞琴吴俊书牛炎方小军梁嘉昕李生辉谷恒学
Owner BEIJING UNIV OF TECH
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