Preparation method of silicate nano hollow structure material

A hollow structure, silicate technology, applied in nanostructure manufacturing, silicate, magnesium silicate and other directions, can solve the problems of time-consuming, expensive template particle removal, complicated soft template preparation, etc., to achieve high ion exchange performance, The effect of good exchange adsorption performance

Inactive Publication Date: 2010-12-22
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen from the above that both the hard template method and the soft template method can obtain relatively uniform mesoporous hollow materials, but the removal of template parti

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  • Preparation method of silicate nano hollow structure material
  • Preparation method of silicate nano hollow structure material
  • Preparation method of silicate nano hollow structure material

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Embodiment 1

[0015] The preparation method of the present embodiment comprises the following steps:

[0016] 1. In the mixed solution of ethanol and polyethylene glycol, add 0.2 mol / L magnesium nitrate solution and 0.2 mol / L sodium silicate solution successively to form a mixed solution, in which ethanol, polyethylene glycol, The volume fractions of magnesium nitrate solution and sodium silicate solution are 30 parts, 3 parts, 1 part and 1 part respectively;

[0017] 2. Add 4mol / L NaOH solution to the mixed solution prepared in step 1, the ratio of NaOH solution to the nitrate solution in step 1 is 1:0.03 by volume and fraction, after magnetic stirring for 15min, transfer to the hydrothermal still, at 190 React under hydrothermal conditions for 12 h, filter and dry to obtain magnesium silicate core-shell microspheres.

[0018] figure 1 Middle: curve b is the XRD characterization of the core-shell sphere product prepared in Example 1, the main diffraction peaks 2θ=19.493, 24.366, 35.307 a...

Embodiment 2

[0021] The preparation method of the present embodiment comprises the following steps:

[0022] 1. In the mixed solution of ethanol and polyethylene glycol, add 0.2 mol / L magnesium nitrate solution and 0.2 mol / L sodium silicate solution successively to form a mixed solution, in which ethanol, polyethylene glycol, The volume fractions of magnesium nitrate solution and sodium silicate solution are 30 parts, 3 parts, 1 part and 1 part respectively;

[0023] 2. Add 4mol / L NaOH solution to the mixed solution prepared in step 1, the ratio of NaOH solution to the nitrate solution in step 1 is 1:0.1 by volume, and after magnetic stirring for 15min, transfer to the hydrothermal kettle, and at 190 React under hydrothermal conditions for 12 h, filter and dry to obtain magnesium silicate hollow microspheres.

[0024] figure 1 Middle: Curve a is the XRD characterization of the magnesium silicate hollow spheres prepared in Example 2, the main diffraction peaks 2θ=19.493, 24.366, 35.307 an...

Embodiment 3

[0028] The preparation method of the present embodiment comprises the following steps:

[0029] 1. In the mixed solution of ethanol and polyethylene glycol, add 0.2 mol / L zinc nitrate solution and 0.2 mol / L sodium silicate solution successively to form a mixed solution, in which ethanol, polyethylene glycol, The volume fractions of zinc nitrate solution and sodium silicate solution are 25 parts, 2 parts, 1 part and 1 part respectively;

[0030] 2. Add 4mol / L NaOH solution to the mixed solution prepared in step 1, the ratio of NaOH solution to nitrate solution in step 1 is 1:0.15 by volume, and after magnetic stirring for 30min, transfer to the hydrothermal kettle, and at 120 React under hydrothermal conditions for 24h, filter and dry to obtain zinc silicate hollow spheres.

[0031] Figure 5 In the middle: a-b are the TEM and SEM characterizations of the zinc silicate product prepared in Example 3. It can be seen from the figure that the product has a hollow sphere structure...

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Abstract

The invention relates to a preparation method of a silicate nano hollow structure material, which comprises the following steps: (1) orderly adding 0.2 mol/L nitrate solution and 0.2 mol/L sodium silicate solution into mixed liquor of ethanol and polyethylene glycol to form a mixed solution, wherein the mixed solution respectively comprises 20-30 parts of ethanol, 2-3 parts of polyethylene glycol, 1 part of nitrate solution and 1-2 parts of sodium silicate solution in parts by volume; (2) adding NaOH solution into the mixed solution obtained in step (1), wherein the volume ratio of NaOH solution to nitrate solution is 1:0.03-0.2; and after conducting magnetic stirring, transferring the mixed solution to a hydrothermal kettle, reacting under the hydrothermal condition of 100-200 DEG C, filtering and drying to obtain the silicate nano hollow structure material. The obtained silicate hollow material can be used for heavy metal ion absorption, and can also be used in the fields of catalysis, medicines, environmental pollution treatment and the like.

Description

technical field [0001] The invention relates to a preparation method of a hollow material, in particular to a preparation method of a silicate nanometer hollow structure material. Background technique [0002] At present, many methods for preparing hollow materials have been developed at home and abroad. The most common methods are the hard template method using inorganic materials, metals, polymer particles, etc. as templates, and the soft template method using microemulsion, vesicles, etc. as templates. For example, Yoon S.B. et al. reported in Advanced Materials in 2002 that surface mesoporous carbon material hollow capsules were prepared using submicron-sized solid-surface mesoporous aluminosilicate spheres as templates (Adv.Mater., 2002, 14:19-21). Djojoputro H. et al. reported in the Journal of The American Chemical Society in 2006 that regular mesoporous organosilicon hollow materials with tunable wall thickness were prepared by using vesicle and liquid crystal dual ...

Claims

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Application Information

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IPC IPC(8): C01B33/20C01B33/22C01B33/26B82B3/00
Inventor 王训庄媛
Owner TSINGHUA UNIV
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