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Porous silicon dioxide double-spherical-shell hollow composite microsphere as well as preparation method and application thereof

A technology of porous silica and composite microspheres, which is applied in the field of powder materials, can solve the problems of separation, recovery and recycling, weak interfacial force, and independent nucleation, etc., and achieve the improvement of independent nucleation and strong acid Alkali resistance, effect of avoiding deposition

Pending Publication Date: 2022-02-22
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the supported adsorbents prepared by common solvothermal and solution methods usually have problems such as weak interfacial force and independent nucleation, especially when functional species are loaded on the surface of micron-scale supports.
In addition, in order to avoid the secondary pollution of the water body caused by the adsorbent, its separation recovery and recycling performance also need to be improved.

Method used

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  • Porous silicon dioxide double-spherical-shell hollow composite microsphere as well as preparation method and application thereof
  • Porous silicon dioxide double-spherical-shell hollow composite microsphere as well as preparation method and application thereof
  • Porous silicon dioxide double-spherical-shell hollow composite microsphere as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A method for preparing porous silica double-shell hollow composite microspheres, comprising the steps of:

[0061] The first step is surface treatment of hollow glass microspheres. Mix 10mL 3-aminopropyltriethoxysilane coupling agent with 150mL distilled water, stir for 10min; add 150mL absolute ethanol, then add 15g glass beads (0.3-0.5g / cm 3 ), stirred for 30 min, suction filtered, washed with ethanol, and dried at 80°C.

[0062] The second step is the coating experiment. First weigh 2g of CTAB into a single-necked flask, add 80ml of distilled water, stir in a 50°C water bath, dissolve until the solution is transparent, and remove from the water bath. Then, add 100ml of absolute ethanol and 5g of the hollow glass microspheres obtained in the first step to the single-necked flask containing the CTAB solution, and stir to mix. Add 10ml of concentrated ammonia water and 0.03g of sodium chloride to the above mixed solution, and stir for 10min. Finally, the mixed solut...

Embodiment 2

[0068] The pretreatment steps were the same as in Example 1, except that the mass of the hollow glass microspheres obtained in the first step was added to be 10 g, and the rest of the conditions remained unchanged to prepare porous silica double-shell hollow composite microspheres.

Embodiment 3

[0070] The pretreatment steps were the same as in Example 1, except that the mass of CTAB added was 3 g, and the rest of the conditions remained unchanged, and porous silica double-shell hollow composite microspheres were prepared.

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Abstract

The invention discloses a preparation method of a porous silicon dioxide double-spherical-shell hollow composite microsphere. The method comprises the following steps: 1) carrying out surface treatment on a hollow microsphere; 2) coating the surface of the hollow microsphere having been subjected to surface treatment in the step 1) with porous silicon dioxide through an electrolyte-assisted sol-gel method; and 3) carrying out a post-treatment process on the product obtained in the step 2) at 50-650 DEG C to obtain the porous silicon dioxide double-spherical-shell hollow composite microsphere in which the hollow microsphere is coated by the porous silicon dioxide. The preparation method is an improved sol-gel method, effective coating of a porous silicon dioxide layer on the surface of the micron-sized hollow microsphere is achieved through microsphere surface treatment and electrolyte adding, and adjustment of the coating thickness and the pore diameter of the porous silicon dioxide is achieved by regulating and controlling experimental conditions. The invention also discloses the hollow composite microsphere prepared by using the method and application thereof.

Description

technical field [0001] The invention relates to the technical field of powder materials. More specifically, it relates to a porous silica double-shell hollow composite microsphere and its preparation method and application. Background technique [0002] With the rapid development of the national economy, the problem of water pollution is becoming more and more serious, and it is imminent to find efficient sewage treatment materials. As a treatment technology with low energy consumption, low pollution and high efficiency, adsorption method plays an extremely important role in the field of sewage treatment. Traditional adsorbent materials include inorganic porous adsorbents, organic polymer adsorbents, flocculants, gel-type adsorbents, etc. Among them, supported adsorbents have attracted extensive attention due to their composite materials and diversified functions. However, supported adsorbents prepared by common solvothermal and solution methods usually have problems such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/28B01J20/30B01J13/02
CPCB01J13/02B01J20/103B01J20/28021
Inventor 安振国杜改平张敬杰杨岩峰
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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