Method for preparing sodium columbate nanowire by cation exchange approach

A cation exchange and nanowire technology, which is applied in chemical instruments and methods, niobium compounds, inorganic chemistry, etc., can solve the problems of difficult synthesis of sodium niobate nanowires, and achieve low cost, good repeatability, and good application prospects Effect

Active Publication Date: 2018-03-06
BEIJING UNIV OF TECH
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Problems solved by technology

However, due to the chemical inertness and stable properties of niobium oxide, coupled with the limitation of the crysta

Method used

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  • Method for preparing sodium columbate nanowire by cation exchange approach
  • Method for preparing sodium columbate nanowire by cation exchange approach
  • Method for preparing sodium columbate nanowire by cation exchange approach

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) First use SnNb 2 o 6 The nanosheets are dispersed in deionized water, and sodium hydroxide is added to make a paste, and then ethylenediamine is added.

[0022] (2) Using the solution obtained in step (1) as a reaction precursor, heat treatment in a closed reactor (volume 20ml) at a temperature of 180°C and a treatment time of 24 hours successfully prepared Na 6 Nb 8 o 25 9H 2 O nanowires;

[0023] where SnNb 2 o 6 The dosages of nanosheets and NaOH are 0.2g and 0.6g respectively, the dosages of deionized water and ethylenediamine are 9.5mL and 0.5mL respectively, and the final aspect ratio of nanowires is 200:1

Embodiment 2

[0025] (1) First use SnNb 2 o 6 The nanosheets are dispersed in deionized water, and sodium hydroxide is added to make a paste, and then ethylenediamine is added.

[0026] (2) Using the solution obtained in step (1) as a reaction precursor, it was heat-treated in a closed reactor (volume 20ml) at a temperature of 200°C for 12 hours, and Na 6 Nb 8 o 25 9H 2 O nanowires;

[0027] where SnNb 2 o 6 The dosages of nanosheets and NaOH were 0.1g and 0.4g, respectively; the dosages of deionized water and ethylenediamine were 8mL and 2mL, respectively. The aspect ratio of the final nanowire is 5:1

Embodiment 3

[0029] (1) First use SnNb 2 o 6 The nanosheets are dispersed in deionized water, and sodium hydroxide is added to make a paste, and then ethylenediamine is added.

[0030] (2) Using the solution obtained in step (1) as the reaction precursor, it was heat-treated in a closed reactor (volume 20ml) at a temperature of 190°C for 18 hours, and Na 6 Nb 8 o 25 9H 2 O nanowires;

[0031] where SnNb 2 o 6 The dosages of nanosheets and NaOH were 0.2g and 0.4g, respectively; the dosages of deionized water and ethylenediamine were 9mL and 1mL, respectively. The aspect ratio of the final nanowire is 80:1

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Abstract

A method for preparing sodium columbate nanowire by cation exchange approach belongs to the field of functional materials. The method comprises the following steps: mixing SnNb2O6 nanosheet powder asa raw material with deionized water, adding sodium hydroxide and blending to obtain paste, adding ethene diamine and conducting mixed solvent thermal treatment of the above mixture, and carrying out acation exchange reaction to prepare a thermostable Na6Nb8O25.9H2O nanowire material. The Na6Nb8O25.9H2O nanowire has a good application prospect in the field of nanometer devices.

Description

technical field [0001] The present invention relates to a kind of utilizing cation exchange to synthesize sodium niobate (Na 6 Nb 8 o 25 9H 2 O) The method of nanowires belongs to the field of functional materials. technical background [0002] Currently, finding new one-dimensional nanomaterials is of great significance in the field of nanodevices. Na 6 Nb 8 o 25 9H 2 O nanowires have great application potential in the fields of gas sensing, catalysis, optics, and storage. However, due to the chemical inertness and stable properties of niobium oxide, coupled with the limitation of the crystal structure of sodium niobate itself, it is difficult to synthesize one-dimensional sodium niobate nanowires in one step. In contrast, the ion-exchange route of the liquid-phase chemical synthesis process is easy to carry out the crystal growth of niobate nanomaterials, especially in the synthesis of one-dimensional structure of niobate has shown unique charm. By utilizing the ...

Claims

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Application Information

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IPC IPC(8): C01G33/00
Inventor 吴俊书王天宁王金淑杜玉成李永利李洪义
Owner BEIJING UNIV OF TECH
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