Method for truncating sodium titanate nanotubes

A technology of nanotubes and sodium titanate, applied in the nano field, can solve the problems of long length, difficult to disperse, and the length of titanate nanotubes is not uniform enough, and achieve the effect of uniform length

Inactive Publication Date: 2009-12-16
NANTONG JINNIU MACHINERY MFR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the length of the sodium titanate / titanate nanotube products obtained above is very long, and they are disordered and entwined, so they are difficult to disperse, which limits their application.
Bavykin et al. used ultrasonic methods to truncate titanate nanotubes (not sodium titanate) (J.Phys.Chem.C 2007, 111, 14644), but the resulting titanate nanotubes were not uniform in length, and the minimum length exceeded 100nm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 2g sodium titanate nanotubes are dispersed in 6L lead nitrate aqueous solution, the concentration of lead nitrate is 5×10 -4 M, stirring at room temperature for 24 hours, sodium titanate nanotubes adsorb lead ions in aqueous solution. After the stirring is completed, the sodium titanate nanotubes adsorbed with lead ions are precipitated, separated, washed and dried, and then dispersed in 6 L of saturated aqueous solution of disodium edetate to obtain a mixed solution, and the mixed solution is stirred at room temperature for 24 hours removing the lead ions adsorbed in the sodium titanate nanotubes; then centrifuging the mixed solution to obtain sodium titanate nanotube precipitates, washing and drying to obtain truncated sodium titanate nanotubes.

Embodiment 2

[0017] 2g sodium titanate nanotubes are dispersed in 2L calcium chloride aqueous solution, the concentration of calcium chloride aqueous solution is 1×10 -1 M, stirring at room temperature for 5 hours, sodium titanate nanotubes adsorb calcium ions in aqueous solution. After the stirring is completed, the sodium titanate nanotubes adsorbed with calcium ions are precipitated, separated, washed and dried, and then dispersed in 2L of saturated aqueous solution of disodium edetate to obtain a mixed solution, and the mixed solution is stirred at room temperature for 5 hours and removing calcium ions adsorbed in the sodium titanate nanotubes; then centrifuging the mixed solution to obtain sodium titanate nanotube precipitates, washing and drying to obtain truncated sodium titanate nanotubes.

Embodiment 3

[0019] 2g sodium titanate nanotubes are dispersed in 4L copper sulfate aqueous solution, the concentration of copper sulfate aqueous solution is 5×10 -2 M, stirring at room temperature for 12 hours, sodium titanate nanotubes adsorb copper ions in aqueous solution. After the stirring, the sodium titanate nanotubes adsorbed with copper ions were precipitated, separated, washed and dried, then dispersed in 4 L of saturated aqueous solution of disodium edetate to obtain a mixed solution, and the mixed solution was stirred at room temperature for 12 After 1 hour, the copper ions adsorbed in the sodium titanate nanotubes are removed; then, the mixed solution is centrifuged to obtain precipitates of sodium titanate nanotubes, which are washed and dried to obtain truncated sodium titanate nanotubes.

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Abstract

The invention relates to a method for truncating sodium titanate nanotubes. The lengths of sodium titanate nanotubes obtained by the prior method are not uniform. The method comprises the concrete steps of: dispersing the sodium titanate nanotubes into water solution of soluble heavy metallic salt; stirring the mixture at normal temperature; performing precipitation separation, washing and drying on the sodium titanate nanotubes absorbed with heavy metal ions; dispersing the obtained product into saturated water solution of disodium ethylene diamine tetraacetate to obtain mixed solution; stirring the mixed solution at normal temperature, and removing the heavy metal ions absorbed in the sodium titanate nanotubes; obtaining a sodium titanate nanotube precipitate after the mixed solution is subjected to centrifugal separation; and obtaining the truncated sodium titanate nanotubes by washing and drying. The lengths of the sodium titanate nanotubes obtained by the truncation are uniform, and can reach 20nm at shortest.

Description

technical field [0001] The invention belongs to the field of nanotechnology, and relates to a method for cutting sodium titanate nanotubes by taking the adsorption-desorption of heavy metal ions as the technical means. Background technique [0002] Sodium titanate nanotubes have structural characteristics such as large specific surface area, hollow channels, layers, and exchangeable sodium ions distributed between layers, and are widely used as catalysts, solar cells, sensor devices, ion exchange materials, and lithium-ion battery materials. , so the preparation of sodium titanate nanotubes has attracted great attention. T. Kasugu easily prepared sodium titanate / nano titanate tubes by using hydrothermal technology (United States Patent Number 6,537,517; Langmuir 1998, 14, 3160; Adv. Mater. 1999, 11, 1307), Jin Zhensheng and others used microwave assisted Sodium titanate / titanate nanotubes (CN100384742C) were prepared by heating method. However, the sodium titanate / titanate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B3/00C01G23/00
Inventor 袁求理聂秋林
Owner NANTONG JINNIU MACHINERY MFR
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