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Magnetic mesoporous silica microsphere as well as preparation method and application thereof

A technology of mesoporous silica and silica, applied in chemical instruments and methods, oxidized water/sewage treatment, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of lack of silica microspheres, etc. problem, to achieve the effect of less quantity, convenient recycling and stable load

Pending Publication Date: 2022-07-29
SHANDONG SHENHUA SHANDA ENERGY ENVIRONMENTAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, the prior art lacks a silica microsphere that not only has a catalytic function but also can be easily recovered.

Method used

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  • Magnetic mesoporous silica microsphere as well as preparation method and application thereof
  • Magnetic mesoporous silica microsphere as well as preparation method and application thereof
  • Magnetic mesoporous silica microsphere as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Preparation of magnetic mesoporous silica microspheres.

[0074] (1) Synthesis of silica microspheres

[0075] Add 100 mL of absolute ethanol and 10 mL of ethyl orthosilicate into a 500-mL beaker and mix them evenly, denoted as solution A; in a 250-mL beaker, measure 100 mL of anhydrous ethanol, 55 mL of deionized water and 18 mL of concentrated ammonia (concentration of 27%) And mix well, record as solution B. At room temperature, the solution B was quickly poured into the solution A and the magnetic stirring was continued for 12 h, the mixture was centrifuged, washed three times alternately with deionized water and anhydrous ethanol, and dried for later use.

[0076] (2) Synthesis of mesoporous silica microspheres

[0077] The mesoporous silica microspheres were synthesized by the method of "surface protection etching". The specific method is as follows;

[0078] 0.3 g of silica microspheres obtained in step (1) were ultrasonically dispersed in 50 mL of deionized w...

Embodiment 2

[0082] The preparation method of magnetic mesoporous silica microspheres is basically the same as that in Example 1, except that the amount of ethyl orthosilicate in step (1) is 15 mL.

Embodiment 3

[0084] The preparation method of magnetic mesoporous silica microspheres is basically the same as that in Example 1, except that the amount of concentrated ammonia water in step (1) is 20 mL.

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Abstract

The invention discloses a magnetic mesoporous silica microsphere and a preparation method and application thereof.The preparation method comprises the steps that silica microspheres are selectively etched to form mesoporous silica microspheres, then magnetic Fe3O4 is loaded on the mesoporous silica microspheres, and the magnetic mesoporous silica microspheres are obtained. The silicon dioxide microspheres obtained by the preparation method provided by the invention are high in catalytic activity, good in stability and easy to recover.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a magnetic mesoporous silica microsphere and a preparation method and application thereof. Background technique [0002] Nanomaterials have high reactivity due to their extremely small size and large surface area. In addition, nanomaterials can also be modified by surface functional groups to enhance their affinity for target pollutants and selectively remove targets. water treatment field. However, the difficulty in solid-liquid separation and recycling of nanomaterials due to their small size is the main reason that hinders their practical application. The proposal and development of magnetic nanomaterials can solve the above problems. Magnetic nanomaterials not only have all the characteristics of nanomaterials, but their unique magnetic properties can also enable them to be recycled and reused through magnetic separation. At present, the most widely used magnetic nanomate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J21/08B01J35/00B01J35/08C02F1/72C02F101/38
CPCB01J23/745B01J21/08C02F1/725C02F1/722C02F2101/38B01J35/33B01J35/51
Inventor 杨春振李敏孙亮
Owner SHANDONG SHENHUA SHANDA ENERGY ENVIRONMENTAL