Preparation method and application method of phenolic resin with hollow shell structure

A phenolic resin and hollow shell technology, applied in the field of nanomaterials, can solve the problems of insufficient oxygen mass transfer and high recombination rate of photogenerated electron holes, and achieve the effects of simple and convenient experimental steps, economical and readily available raw materials, and complete hollow shell structure.

Active Publication Date: 2020-12-11
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

However, most of the photocatalysts reported so far have the disadvantages of insufficient oxygen mass transfer and high photogenerated electron-hole recombination rate.

Method used

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  • Preparation method and application method of phenolic resin with hollow shell structure
  • Preparation method and application method of phenolic resin with hollow shell structure
  • Preparation method and application method of phenolic resin with hollow shell structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0059] To prepare hollow shell structure phenolic resin, the concentration of ammonium bifluoride aqueous solution is respectively (1M, 2M, 4M).

[0060] To prepare phenolic resin grown on the surface of silica nanoparticles, the temperature of the hydrothermal reaction is 200°C, and the hydrothermal time is 20h:

[0061] Add 70ml of absolute ethanol and 10ml of deionized water into a round bottom flask, and stir at room temperature for 5min. Then add 6ml of tetraethyl silicate, stir for 40min, then add 3ml of ammonia water, and continue stirring for 1h. The reacted solution was centrifuged, washed with ethanol and water three times until the supernatant was neutral, and silica nanoparticles were obtained. Add 0.8 g of the prepared silicon dioxide nanoparticles into 30 ml of deionized water and 70 ml of absolute ethanol, and sonicate at room temperature for 40 min to disperse the nanoparticles evenly. Add 3.2g of cetyltrimethylammonium bromide CTAB to the dispersion liquid, ...

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Abstract

The invention provides a preparation method of a catalyst based on a phenolic resin nano material with a hollow shell structure. The catalyst can be well applied to a visible light photocatalysis hydrogen peroxide production system. A hard template method is adopted, silicon dioxide (SiO2) nanospheres are used as a hard template, and a long-chain surfactant cetyl trimethyl ammonium bromide (CTAB)is used as a dispersing agent. The preparation method comprises the following steps: adding CTAB (cetyltrimethyl ammonium bromide) serving as a dispersing agent into a uniformly dispersed silicon dioxide solution, and coating the outer surface of silicon dioxide with precursor solution macromolecules of phenolic resin through polycondensation under the dispersion action of a surfactant; accordingto the method, the morphology of the phenolic resin nano material can be controlled by adjusting the hydrothermal temperature, the hydrothermal time and the concentration of ammonium bifluoride in alkali etching, and excellent catalytic activity is shown. When the catalyst is applied to a photocatalytic hydrogen peroxide production system, it is found that the catalyst can efficiently catalyze hydrogen peroxide production.

Description

technical field [0001] The invention relates to a preparation method of a hollow shell structure phenolic resin nano material, and the application thereof to produce hydrogen peroxide by photocatalysis, belonging to the technical field of nano materials. Background technique [0002] Hydrogen peroxide can be used as both an oxidizing agent and a reducing agent. It is widely used in biochemical treatment, environmental restoration and chemical production. In the traditional synthesis process, the anthraquinone method requires a noble metal catalyst and hydrogen activation to regenerate anthraquinone, and the direct synthesis method of hydrogen peroxide from hydrogen and oxygen has the risk of explosion. Therefore, a photocatalytic hydrogen peroxide production method that does not require noble metals as a catalyst, has mild reaction conditions, and has a sustainable reaction has attracted widespread attention. [0003] In the photocatalytic hydrogen peroxide production syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/22C08J9/26C01B15/022B82Y40/00B01J31/06C08L61/12
CPCC08G8/22C08J9/26C01B15/022B82Y40/00B01J31/063B01J35/004C08J2361/12C08J2201/044Y02P20/584
Inventor 雷菊英周亮张宁张金龙刘勇弟王灵芝田云浩
Owner EAST CHINA UNIV OF SCI & TECH
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