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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 the direction of silica, silica, chemical instruments and methods, etc., can solve problems such as difficult regeneration, low adsorption capacity and adsorption rate of decontamination materials, and interference of coexisting ions , to achieve the effect of fast adsorption rate, good recycling performance and improved utilization efficiency

Active Publication Date: 2021-02-26
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 the functionalized dendritic mesoporous silica nanosphere of La activation 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 into 25ml of deionized water dissolved with 68mgTEA, and stirred at 80°C for 1 hour. Then, under this condition, 4ml of TEOS was added dropwise and kept stirring for 2h. The mixture was centrifuged at 7500 rpm for 40 min, and then the product was washed three times with a 1:1 ethanol:water solution and dried overnight at 60 °C. 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 the molar ratio of CTAB.

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

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

Embodiment 2

[0052] The preparation method of the functionalized dendritic mesoporous silica nanosphere of La activation 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 into 25ml of deionized water dissolved with 68mgTEA, and stirred at 80°C for 1 hour. Then, under this condition, 4ml of TEOS was added dropwise and kept stirring for 2h. The mixture was centrifuged at 7500 rpm for 40 min, and then the product was washed three times with a 1:1 ethanol:water solution and dried overnight at 60 °C. 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 the molar ratio of CTAB.

[0055] 2. Preparation of PEI-grafted mesoporous silica

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

Embodiment 3

[0060] The preparation method of the functionalized dendritic mesoporous silica nanosphere of La activation 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 into 25ml of deionized water dissolved with 68mgTEA, and stirred at 80°C for 1 hour. Then, under this condition, 4ml of TEOS was added dropwise and kept stirring for 2h. The mixture was centrifuged at 7500 rpm for 40 min, and then the product was washed three times with a 1:1 ethanol:water solution and dried overnight at 60 °C. 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 the molar ratio of CTAB.

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

[0064] 0.5gMSN was added to 10ml of PEI / methanol solution (w / v=5, 10 or 15%), and stirred at 30°C...

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Abstract

The invention belongs to the field of mesoporous silica material preparation technology and application thereof, and particularly discloses a preparation method and application of La-activated functionalized dendritic mesoporous silica nanospheres. The preparation method and application comprise the following steps: (1) preparing dendritic mesoporous silica nanospheres; (2) reacting polyethyleneimine (PEI), glutaraldehyde and dendritic mesoporous silica pore channels to obtain functionalized mesoporous silica nanospheres; (3) obtaining La activated dendritic mesoporous silica nanospheres withhigh-dispersion La<3+> active sites through coordination of amino groups in the PEI functional groups and La<3+>; and (4) applying the prepared La-activated dendritic mesoporous silica nanospheres asan adsorbent and an anion exchange material to exert outstanding adsorption removal performance on anion pollutants in wastewater. The scheme is mainly used for preparing the high-activity and renewable mesoporous silica nanosphere adsorbent, and solves the problems of low adsorption capacity, high possibility of being interfered by coexisting ions and the like of a decontamination material in theprior art.

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 prone to occur, leading to deterioration of water quality and even algae blooms, which seriously endanger the ecological environment of water bodies and even human health. Organic dyes affect the chromaticity and light transmittance of the water body, reduce the dissolved oxygen content in the water body, and affect the water ecological environment. Moreover, dye molecules are not easy to biodegrade, and ...

Claims

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Application Information

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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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