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Preparation method and application of la-activated functionalized dendritic mesoporous silica nanospheres

A technology of mesoporous silica and nanospheres, applied in silica, silica, chemical instruments and methods, etc., can solve the problems of low adsorption capacity and adsorption rate of decontamination materials, difficult regeneration, coexisting ion interference, etc. , to achieve good recycling performance, improve utilization efficiency, high-efficiency selective adsorption effect

Active Publication Date: 2022-08-05
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of preparation and the use method of the functionalized dendritic mesoporous silica nanosphere of La activation, in order to obtain the novel adsorbent of high adsorption capacity and fast adsorption rate, be used to solve the problem of detoxification in the prior art. The adsorption capacity and adsorption rate of polluted materials are not high, they are easily interfered by coexisting ions, and they are not easy to regenerate, etc.

Method used

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  • Preparation method and application of la-activated functionalized dendritic mesoporous silica nanospheres
  • Preparation method and application of la-activated functionalized dendritic mesoporous silica nanospheres
  • Preparation method and application of la-activated functionalized dendritic mesoporous silica nanospheres

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Embodiment 1

[0044] The preparation method of La-activated functionalized dendritic mesoporous silica nanospheres comprises the following steps:

[0045] 1. Preparation of Dendritic Mesoporous Silica Nanospheres

[0046] 380mg CTAB and a certain amount of FC 2 (molar ratio FC 2 : CTAB=0.2, 0.4, and 0.5.) was added to 25 ml of deionized water in which 68 mg of TEA was dissolved, and stirred at 80° C. for 1 hour. Then, 4 ml of TEOS was added dropwise under this condition, and stirring was kept for 2 h. The mixture was centrifuged at 7500 rpm for 40 minutes, then the product was washed three times with a 1:1 ethanol:water solution and dried at 60°C overnight. The obtained product was calcined at 550 °C for 6 hours to remove the surfactant, and the product was named MSN-x (x=0.2, 0.4, 0.5), where x is FC 2 and CTAB molar ratio.

[0047] 2. Preparation of PEI-grafted dendritic mesoporous silica nanospheres

[0048] 0.5g of MSN was added to 10ml of PEI / methanol solution (w / v=5, 10 or 15%) ...

Embodiment 2

[0052] The preparation method of La-activated functionalized dendritic mesoporous silica nanospheres comprises the following steps:

[0053] 1. Preparation of Dendritic Silica Nanospheres

[0054] 380mg CTAB and a certain amount of FC 2 (molar ratio FC 2 : CTAB=0.2, 0.4, and 0.5.) was added to 25 ml of deionized water in which 68 mg of TEA was dissolved, and stirred at 80° C. for 1 hour. Then, 4 ml of TEOS was added dropwise under this condition, and stirring was kept for 2 h. The mixture was centrifuged at 7500 rpm for 40 minutes, then the product was washed three times with a 1:1 ethanol:water solution and dried at 60°C overnight. The obtained product was calcined at 550 °C for 6 hours to remove the surfactant, and the product was named MSN-x (x=0.2, 0.4, 0.5), where x is FC 2 and CTAB molar ratio.

[0055] 2. Preparation of PEI-grafted Mesoporous Silica

[0056] 0.5g of MSN was added to 10ml of PEI / methanol solution (w / v=5, 10 or 15%) and stirred at 30°C for 10 hours....

Embodiment 3

[0060] The preparation method of La-activated functionalized dendritic mesoporous silica nanospheres comprises the following steps:

[0061] 1. Preparation of Dendritic Silica Nanospheres

[0062] 380mg CTAB and a certain amount of FC 2 (molar ratio FC 2 : CTAB=0.2, 0.4, and 0.5.) was added to 25 ml of deionized water in which 68 mg of TEA was dissolved, and stirred at 80° C. for 1 hour. Then, 4 ml of TEOS was added dropwise under this condition, and stirring was kept for 2 h. The mixture was centrifuged at 7500 rpm for 40 minutes, then the product was washed three times with a 1:1 ethanol:water solution and dried at 60°C overnight. The obtained product was calcined at 550 °C for 6 hours to remove the surfactant, and the product was named MSN-x (x=0.2, 0.4, 0.5), where x is FC 2 and CTAB molar ratio.

[0063] 2. Preparation of PEI-grafted dendritic mesoporous silica nanospheres

[0064] 0.5g of MSN was added to 10ml of PEI / methanol solution (w / v=5, 10 or 15%) and stirred...

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Abstract

The application of the present invention belongs to the preparation technology of mesoporous silica material and its application field, and specifically discloses a preparation method and application of La-activated functionalized dendritic mesoporous silica nanospheres. (1) Preparation of dendritic mesoporous silica nanospheres. Porous silica nanospheres; (2) Polyethyleneimine (PEI), glutaraldehyde and dendritic mesoporous silica pores react to obtain functionalized mesoporous silica nanospheres; Amino and La 3+ coordination to obtain a highly dispersed La 3+ La-activated dendritic mesoporous silica nanospheres with active sites; (4) The prepared La-activated dendritic mesoporous silica nanospheres can be used as adsorbents and anion exchange materials, and have good effects on anionic pollutants in wastewater. Outstanding adsorption and removal performance. This solution is mainly used to prepare a highly active and regenerable mesoporous silica nanosphere adsorbent, which solves the problems of low adsorption capacity of decontamination materials in the prior art and easy interference from coexisting ions.

Description

technical field [0001] The invention belongs to the technical field of preparation of mesoporous silica materials, and specifically discloses a preparation method and application of La-activated dendritic mesoporous silica nanospheres. Background technique [0002] In recent years, inorganic phosphorus and organic dyes are two common types of pollutants in wastewater. Among them, phosphorus is the main limiting factor leading to eutrophication of water bodies. When the concentration of total phosphorus in water bodies exceeds the standard, eutrophication of water bodies is likely to occur, resulting in deterioration of water quality and even algal blooms, which seriously endanger the water body ecological environment and even human health. Organic dyes affect the chromaticity and light transmittance of the water body, reduce the content of dissolved oxygen in the water body, and affect the water ecological environment. In addition, the dye molecules are not easily biodegrad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/18B01J20/10B01J20/28B01J20/30C02F1/28C02F101/10C02F101/30
CPCC01B33/18B01J20/103B01J20/28004B01J20/28083C02F1/281C02F2101/105C02F2101/308C02F2303/16C01P2004/32C01P2006/12C01P2006/14C01P2006/17C01P2004/64C01P2004/04C01P2002/72C01P2004/03
Inventor 黄微雅张川群刘新杨凯陈喜蓉
Owner JIANGXI UNIV OF SCI & TECH
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