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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

AI Technical Summary

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 strontium niobate / strontium carbonate composite nanomaterials. The method includes: using SnNb 2 O 6 Nanomaterials are used as raw materials in a mixed alkali solution of potassium hydroxide and strontium hydroxide and CO 2 Hydrothermal reactions are carried out in the presence of The method provided by the invention has good repeatability, simple operation, is conducive to mass production, can greatly reduce costs, improve efficiency, and prepare SrNb 2 O 6 / SrCO 3 Composite nanomaterials have stable quality and have good application prospects in the field of photocatalytic water treatment, and can promote the development of metastable niobate crystallization methods and promote practical application research of niobate.

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
CPCC01F11/187C01G35/00B01J27/232C01P2004/03C01P2002/72B01J35/39
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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