Oxidized graphene doped mesoporous silicon film, preparation method thereof and application of film

A mesoporous silicon and graphene technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve problems such as poor selectivity, secondary pollution, difficult continuous operation of powder materials, etc. Achieve the effects of easy recycling, energy saving, and continuous operation

Inactive Publication Date: 2018-07-27
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these separation methods have some defects. The powder material is difficult to operate continuously, which is easy to cause secondary pollution, and there is generally a bottleneck of poor selectivity.

Method used

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  • Oxidized graphene doped mesoporous silicon film, preparation method thereof and application of film
  • Oxidized graphene doped mesoporous silicon film, preparation method thereof and application of film
  • Oxidized graphene doped mesoporous silicon film, preparation method thereof and application of film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043](1) Take 10 g of commercially available cotton and place it in 150 mL of sulfuric acid solution with a mass fraction of 40%, then stir and react at 35°C for 2 hours, then transfer it to a beaker, dilute it to 600 mL with distilled water, then let it stand overnight and pour Remove the supernatant, centrifuge the suspension, wash with distilled water three times to remove the amorphous substance, transfer the suspension to a dialysis membrane for dialysis for 3 to 5 days, adjust the pH to 2.4, then sonicate for 10 minutes, and dilute to obtain nanocellulose crystals ( NCC) for use;

[0044] (2) Pipette 10 mL of the NCC obtained in step (1), sonicate for 20 min, place it in a round bottom flask, add 100 mg of glucose and 100 μL of graphene oxide (GO), stir for 1 h, and then add 40 μL of diethylphosphonoethyl A mixed solution of triethoxysilane (PETES) and 410 μL tetraethyl silicate (TEOS), stirred at 50°C for 2 hours, poured into a watch glass and dried in a water bath at ...

Embodiment 2

[0058] (1) Take 10g of commercially available cotton and place it in 150mL of sulfuric acid solution with a mass fraction of 50wt%, then stir and react at 45°C for 3h, then transfer it to a beaker, dilute to 600mL with distilled water, then let stand overnight to separate layers, pour Remove the supernatant, centrifuge the precipitate, wash with distilled water three times to remove the mixed solution attached to the precipitate, transfer the precipitate to a dialysis membrane for dialysis for 3 to 5 days, adjust the pH to 2.4 within half an hour, and then sonicate for 20 minutes to dilute to obtain nanofibers Plain crystal (NCC) for use;

[0059] (2) Pipette 10 mL of nanocellulose crystals (NCC) obtained in step (1) and sonicate for 20 min, place them in a round bottom flask, add 150 mg of glucose and 250 μL of graphene oxide (GO), stir for 2 h, and then add 50 μL of A mixed solution of ethylphosphonoethyltriethoxysilane (PETES) and 400 μL tetraethyl silicate (TEOS), stirred ...

Embodiment 3

[0072] (1) Get 10g of commercially available cotton and place it in 150mL mass fraction of 60wt% sulfuric acid solution, then stir and react at 55°C for 4 hours, then transfer it to a beaker, dilute to 600mL with distilled water, then let it stand overnight for stratification, Pour off the supernatant, centrifuge the precipitate, wash with distilled water three times to remove the mixed solution attached to the precipitate, transfer the precipitate to a dialysis membrane for dialysis for 3 to 5 days, adjust the pH to 2.4, then sonicate for 10 minutes, and dilute to obtain nanocellulose crystals (NCC) for use;

[0073] (2) Pipette the NCC obtained from the treatment in step (1), pipette 10mL after ultrasonication for 20min, place it in a round bottom flask, add 200mg glucose and 500μL graphene oxide (GO), stir for 3h, then add 60μL diethyl A mixed solution of phosphoethyltriethoxysilane (PETES) and 390 μL tetraethyl silicate (TEOS), stirred at 70°C for 3 hours, poured into a wa...

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Abstract

The invention belongs to the technical field of material preparation and separation, and relates to a preparation method of an oxidized graphene doped ordered mesoporous silicon film with high lanthanum adsorption capacity and high selectivity. The one-step direct synthesis preparation method is used for adsorption and recovery of lanthanum serving as a rare earth element. Biomass nano-crystallinecellulose (NCCs) serves as a template, diethyl phosphinylidyne ethyltriethoxysilane (PETES), tetraethl silicate (TEOS) and graphene oxide (GO) are synthesized into film materials, the adsorption performance of adsorbents is greatly improved, continuous operation of the film materials is facilitated, and the film materials are easily recovered and superior to powder materials and have great advantages among various adsorption materials.

Description

technical field [0001] The invention belongs to the technical field of material preparation and separation, and relates to a method for preparing a graphene oxide-doped ordered mesoporous silicon membrane with high adsorption capacity and high selectivity for lanthanum. The preparation method adopts one-step direct synthesis to use For the adsorption and recovery of rare earth element lanthanum. Background technique [0002] Due to their unique physical and chemical properties, rare earth elements are widely used in high-tech fields, such as magnetic materials, electronic services, chemical sensors and lidar. Among them, lanthanum is a kind of rare earth element, and a small dose can greatly improve product performance. In addition, high-purity lanthanum oxide is a key component of optical lenses because of its high refractive index and low dispersion optical properties. However, with the increase in the application fields of rare earth elements and the decrease in supply,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C22B59/00C22B3/24
CPCB01J20/20B01J20/22B01J20/24B01J20/28033B01J20/28083B01J20/3057C22B3/24C22B59/00Y02P10/20
Inventor 刘恩秀张福生刘恩利闫永胜
Owner JIANGSU UNIV
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