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Hollow core-shell type magnetic mesoporous carbon nitride and preparation method thereof

A technology of mesoporous carbon nitride and magnetic iron oxide, applied in chemical instruments and methods, chemical/physical process, physical/chemical process catalyst, etc., can solve the problems of single material component, high specific surface area and limited function, etc. To achieve the effect of simple preparation, strong functionality and regular structure

Inactive Publication Date: 2017-06-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composition of the material is single, and its function is limited
High specific surface area, multi-component functional carbon nitride materials with unique configurations have not been reported yet

Method used

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  • Hollow core-shell type magnetic mesoporous carbon nitride and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0018] Take 0.2g of Fe 3 O 4 Disperse in 100ml of absolute ethanol and 20ml of deionized water, add 3ml of concentrated ammonia water, 1ml of tetraethyl silicate, and mechanically stir for 18h at room temperature. The product is magnetically separated. After drying, it is calcined at 500℃ for 4h to obtain a single layer of non-porous SiO 2 Core-shell material coated with magnetic iron oxide (γ-Fe 2 O 3 @SiO 2 ); take 0.2g γ-Fe 2 O 3 @SiO 2 Disperse in 100ml deionized water and 60ml absolute ethanol, add 0.2g cetyltrimethylammonium bromide, stir to dissolve, add 3ml concentrated ammonia water, add 1ml tetraethyl silicate, continue stirring at 40℃ 6-48h, the product is magnetically separated, and after drying, it is calcined at 550℃ for 4h to obtain a double-layer core-shell structure magnetic mesoporous SiO 2 Ball (γ-Fe 2 O 3 @SiO 2 @mSiO 2 ); take 0.2g γ-Fe 2 O 3 @SiO 2 @mSiO 2 Soaked in 10ml of cyanamide aqueous solution with a concentration of 0.4g / ml, dried under vacuum at 60°C...

Embodiment 2

[0020] Take 0.2g of Fe 3 O 4 Disperse in 100ml of absolute ethanol and 20ml of deionized water, add 3ml of concentrated ammonia water, 1ml of tetraethyl silicate, and mechanically stir for 18h at room temperature. The product is magnetically separated. After drying, it is calcined at 500℃ for 4h to obtain a single layer of non-porous SiO 2 Core-shell material coated with magnetic iron oxide (γ-Fe 2 O 3 @SiO 2 ); take 0.2g γ-Fe 2 O 3 @SiO 2 Disperse in 100ml deionized water and 60ml absolute ethanol, add 0.2g cetyltrimethylammonium bromide, stir to dissolve, add 3ml concentrated ammonia water, add 1ml tetraethyl silicate, continue stirring at 40℃ 6-48h, the product is magnetically separated, and after drying, it is calcined at 550℃ for 4h to obtain a double-layer core-shell structure magnetic mesoporous SiO 2 Ball (γ-Fe 2 O 3 @SiO 2 @mSiO 2 ); take 0.2g γ-Fe 2 O 3 @SiO 2 @mSiO 2 Soaked in 10ml dicyandiamide aqueous solution with a concentration of 0.16g / ml, dried under vacuum at 60...

Embodiment 3

[0022] Take 0.2g of Fe 3 O 4 Disperse in 100ml of absolute ethanol and 20ml of deionized water, add 3ml of concentrated ammonia water, 1ml of tetraethyl silicate, and mechanically stir for 18h at room temperature. The product is magnetically separated. After drying, it is calcined at 500℃ for 4h to obtain a single layer of non-porous SiO 2 Core-shell material coated with magnetic iron oxide (γ-Fe 2 O 3 @SiO 2 ); take 0.2g γ-Fe 2 O 3 @SiO 2 Disperse in 100ml deionized water and 60ml absolute ethanol, add 0.4g block copolymer P123, stir to dissolve, add 0.1ml dilute hydrochloric acid (0.05M), add 1ml tetraethyl silicate, continue stirring at 40℃ 48h, the product is magnetically separated, and after drying, it is calcined at 550℃ for 4h to obtain a double-layer core-shell magnetic mesoporous SiO 2 Ball (γ-Fe 2 O 3 @SiO 2 @mSiO 2 ); take 0.2g γ-Fe 2 O 3 @SiO 2 @mSiO 2 Soaked in 10ml dicyandiamide aqueous solution with a concentration of 0.16g / ml, dried under vacuum at 60°C, calcined a...

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Abstract

The invention provides hollow core-shell type magnetic mesoporous carbon nitride and a preparation method thereof. The preparation method comprises the steps: taking magnetic mesoporous silica spheres having a double-layer core-shell structure as a template, placing the magnetic mesoporous silica spheres in an aqueous solution of a carbon nitrogen precursor, fully impregnating, carrying out vacuum drying, calcining in a nitrogen atmosphere, and dissolving silica by using a sodium hydroxide solution, to obtain the magnetic mesoporous carbon nitride with the hollow core-shell structure. The material has a spherical morphology, has the specific surface area of 20-200 m<2> / g and has the typical core-shell structure; an inner core is magnetic iron oxide microspheres with the diameter of 100-400 nm, an outer shell layer is hollow mesoporous carbon nitride, the pore size of mesopores is 2-8 nm, the cavity diameter is 140-600 nm, and the thickness is 20-100 nm. The hollow core-shell type magnetic mesoporous carbon nitride has the effects and the advantages that a novel multi-functional composite material is provided and has good application prospects in the fields of catalysis, adsorption and separation, environmental purification and the like.

Description

Technical field [0001] The invention belongs to the field of new material preparation, and specifically relates to a hollow core-shell type magnetic mesoporous carbon nitride and a preparation method thereof. Background technique [0002] Carbon nitride (C 3 N 4 ) Is a new type of inorganic polymer material calculated and successfully synthesized manually. Due to its unique optical properties, semiconductor properties, biocompatibility, high hardness and good stability, it has received extensive attention from researchers all over the world in recent years. Among the five phases of carbon nitride (α, β, cubic, quasi-cubic, graphite), graphite phase carbon nitride (g-C 3 N 4 ) With a special physical and electronic energy band structure, it has shown good application prospects in the fields of photocatalysis, solar cells, energy conversion, and environmental purification. At present, the methods for synthesizing graphite phase carbon nitride mainly include solid phase reaction me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10C02F1/00
CPCC02F1/00B01J27/24C02F2101/30B01J35/33B01J35/60B01J35/613B01J35/615B01J35/647
Inventor 金长子王彦杰朱凯新王军虎
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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