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Method for preparing cellular silicon dioxide nanotubes

A silicon dioxide, honeycomb technology, applied in the direction of silicon dioxide, silicon oxide, nanotechnology, etc., can solve the problem that honeycomb silicon dioxide nanotubes have not been reported.

Inactive Publication Date: 2013-01-16
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The above reports are all single-channel nanotubes, but honeycomb silica nanotubes have not been reported yet.

Method used

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  • Method for preparing cellular silicon dioxide nanotubes
  • Method for preparing cellular silicon dioxide nanotubes
  • Method for preparing cellular silicon dioxide nanotubes

Examples

Experimental program
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Effect test

example 1

[0023] Dissolve CTAB and P123 in 100ml of concentrated ammonia water with a mass fraction of 25%, heat to 60°C and keep the temperature constant, stir until clarification at a stirring speed of 550rpm, add 1.5ml TEOS, continue stirring for 6 hours, and dissolve the reacted solid-liquid The mixture was transferred to a Teflon-lined stainless steel autoclave with hydrothermal heating. The resulting product was centrifuged, washed, dried, and then roasted at 550°C for 6h to remove the surfactant. where CTAB:P123:H 2 O: SiO 2 : NH 3 The molar ratio is 0.4:0.005:566:1:200. From figure 1 In -a, it can be seen that the surface of the obtained product is smooth and regular, with a length of about 0.8 μm and a thickness of about 120 nm. Depend on figure 1 -b and 1-c, it can be seen that the pores of silica nanotubes are regular and obviously honeycomb.

example 2

[0025] The operation is the same as in Example 1, except that the amounts of CTAB and P123 are changed to obtain honeycomb silica nanotubes with a length of about 1 μm and a thickness of about 200 nm. where CTAB:P123:H 2 O: SiO 2 : NH 3 The molar ratio is 2.4:0.02:566:1:200.

example 3

[0027] The operation is the same as in Example 1, except that the amount of CTAB, P123 and TEOS is changed, the mass fraction of ammonia water is 1%, and the rotation speed is 50 rpm. Depend on figure 2 It can be seen that the obtained honeycomb silica nanotubes have a smooth surface and good regularity, the length is about 5 μm, and the thickness is about 60 nm. where CTAB:P123:H 2 O: SiO 2 : NH 3 The molar ratio is 0.15:0.01:560:1:6.

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Abstract

The invention relates to a method for preparing cellular silicon dioxide nanotubes, in particular to a method for preparing a series of cellular silicon dioxide nanotubes which have different lengths and thicknesses, and belongs to the technical field of nano materials. The cellular silicon dioxide nanotube is synthesized by taking a quaternary ammonium salt cation surfactant with different carbon chain lengths as a main template agent, and a triblock copolymer as a co-template agent under the alkaline condition in a sol-gel method. The cellular silicon dioxide nanotubes are characterized in that the appearance is regular, and the lengths are adjustable within the range of 0.5 and 5 micrometers and the thicknesses are adjustable in the range of 60 and 400 micrometers. By the method, the porous silicon dioxide nanotubes can be synthesized easily, conveniently and effectively, raw materials are readily available, and the method is suitable for enlargement production. The cellular silicon dioxide nanotubes have high potential application value in fields of catalysis, adsorption, separation, nano reactors, semiconductors, photoelectronic devices, sensors, medicine release and the like.

Description

technical field [0001] The invention belongs to the technical field of nanometer material preparation. It specifically relates to the preparation of a series of honeycomb silica nanotubes of different lengths and thicknesses. Background technique [0002] Silica nanotubes have many unique properties, such as: stable structure, large specific surface area, controllable pore size and capacity, and its unique surface properties are conducive to the fixed-point delivery and adsorption of molecules of different sizes, shapes and functions, improving The loading efficiency of functional molecules realizes the multifunctionalization of materials. [0003] Carbon nanotubes are the earliest synthesized nanomaterials with hollow structures. Its unique high conductivity, excellent strength, chemical selectivity and high elasticity make it an important member in the field of nanomaterials. After carbon nanotubes, many substances have been discovered one after another, such as boron n...

Claims

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Application Information

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IPC IPC(8): C01B33/12B82Y30/00B82Y40/00
Inventor 孔岩王海青王军秦华杜军吕忆农
Owner NANJING UNIV OF TECH
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