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Chitosan modified mesoporous material as well as preparation method and application thereof

A technology of mesoporous materials and chitosan, which is applied in the field of chitosan-modified mesoporous materials, can solve the problems of cumbersome preparation process and high preparation cost, and achieve the effects of wide sources, reduced processing costs and abundant raw materials

Active Publication Date: 2017-06-13
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when preparing mesoporous silicon material adsorbents, it is generally necessary to add an expensive silane coupling agent to functionalize the mesoporous material, and then to modify the biomass, which greatly increases the preparation cost and makes the preparation process more cumbersome.

Method used

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  • Chitosan modified mesoporous material as well as preparation method and application thereof
  • Chitosan modified mesoporous material as well as preparation method and application thereof
  • Chitosan modified mesoporous material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 A kind of chitosan modified mesoporous material

[0035] (1) The preparation method is as follows:

[0036] 1) Add 4.0g P123 to 120g H 2 O and 20mL of concentrated hydrochloric acid (37wt%) solution, stirring and dissolving to clarity, to obtain solution A;

[0037] 2) Then a certain amount of Na 2 SiO 3 9H 2 O solution (5g Na 2 SiO 3 9H 2 O dissolved in 5g H 2 O, that is, the Na 2 SiO 39H 2 O solution), was slowly dropped into solution A, and after reacting for 1h under stirring at 40°C, solution B was obtained;

[0038] 3) Slowly drop a certain amount of Na into solution B 2 SiO 3 9H 2 O solution (5.5g Na 2 SiO 3 9H 2 O dissolved in 5.5g H 2 O, that is, the Na 2 SiO 3 9H 2 O solution), reacted for 1.5h to obtain solution C;

[0039] 4) Dissolve 2g of chitosan CTS in 2wt% acetic acid solution to obtain a chitosan solution; add the chitosan solution into solution C, stir well and drop in 15mL of glutaraldehyde Glu (25wt%) to react for ...

Embodiment 2

[0045] Example 2: During the preparation of chitosan-modified mesoporous materials, the effect of changing the amount of chitosan added on the rhenium adsorption effect in the solution

[0046] In the preparation process of the chitosan-modified mesoporous material, only the amount of chitosan CTS in step 4) was changed, and the other steps were the same as in Example 1. That is, 0.5 g, 1 g, 2 g, and 3 g of CTS were weighed and dissolved in an acetic acid (2 wt %) solution to obtain a chitosan solution, and finally a chitosan-modified mesoporous material was obtained.

[0047] Take above-mentioned 10mg chitosan mesoporous material respectively as adsorbent and add the solution of different pH (pH=1,2,3,4,5,6,7) 20ppm Re(VII), it is shaken in box with 180r / min, shaking at 30°C for 24h.

[0048] Depend on Figure 5 It can be seen that when the chitosan mesoporous composite adsorbent is pH ≥ 3, the silicon source (Na 2 SiO 3 9H 2 When the mass ratio of O) to chitosan CTS is...

Embodiment 3

[0049] Example 3 Influence of chitosan-modified mesoporous material on the adsorption effect in solution under the condition of changing the amount of glutaraldehyde in the preparation process

[0050] During the preparation of the chitosan-modified mesoporous material, only the amount of glutaraldehyde in step 4) was changed, and other steps were the same as in Example 1. That is, 10 mL, 15 mL, and 20 mL of glutaraldehyde (25 wt %) solutions were added dropwise to finally prepare chitosan-modified mesoporous materials.

[0051] Take above-mentioned 10mg chitosan mesoporous material respectively as adsorbent and add the solution of different pH (pH=1,2,3,4,5,6,7) 20ppm Re(VII), it is shaken in box with 180r / min, shaking at 30°C for 24h.

[0052] Depend on Image 6 Visible, chitosan mesoporous composite adsorbent, under the condition of pH ≥ 3, low concentration rhenium solution, when the mass ratio of CTS and 25wt% Glu is 1:7.95-10.6, the adsorption effect of the prepared a...

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Abstract

The invention discloses a chitosan modified mesoporous material. The chitosan modified mesoporous material is characterized in that the mesoporous material is the chitosan modified mesoporous material CC-CTS prepared by taking P123 as a template agent and Na2SiO3.9H2O as a silicon source through the steps of adding a chitosan CTS solution in a hydrolysis process of Na2SiO3, carrying out glutaraldehyde crosslinking and hydrothermal synthesis, filtering, drying, carrying out Soxhlet extraction to remove a template and drying. The mesoporous composite material provided by the invention can be used as an adsorbent for adsorbing rhenium in a rhenium-containing solution; and the chitosan modified mesoporous material has the advantages of simple method, low cost, great rhenium adsorption amount and the like.

Description

technical field [0001] The invention belongs to the fields of green adsorbent preparation, rare metal extraction technology and mesoporous material preparation, and specifically relates to a chitosan-modified mesoporous material synthesized by a simple one-step method, and its use as an adsorbent from a solution containing rhenium ions Effectively adsorb rhenium ions. Background technique [0002] Rhenium has excellent properties such as high melting point, high boiling point, high density, wear resistance and corrosion resistance. These properties of rhenium make it and its alloys widely used in electronics industry, national defense, aerospace, petrochemical and other fields. The rhenium resources are mainly scattered in molybdenite and copper rhenium ore. During the oxidation and roasting process of molybdenite, most of the Re in the dust 2 o 7 In the process of wet processing, it reacts with water to form perrhenic acid (HReO 4 ) into the waste liquid. Therefore, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20
CPCB01J20/267B01J20/268B01J2220/4825C02F1/285C02F2101/20
Inventor 单炜军张丹阳娄振宁熊英
Owner LIAONING UNIVERSITY
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