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Three-dimensional layered graphite-phase nitrogen carbide/MOF composite material and preparation method thereof

A composite material and layered graphite technology, applied in the field of materials, can solve the problems of limiting the wide application of MOFs materials, poor dispersion in water, poor stability, etc., and achieve fast adsorption speed, good stability, and good dispersion.

Active Publication Date: 2016-08-31
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although MOFs materials have achieved good results in the removal of organic dyes in the environment, there are some defects in MOFs themselves, such as small pore size, poor dispersion in water, poor stability, etc., which greatly limit the further widespread use of MOFs materials.

Method used

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  • Three-dimensional layered graphite-phase nitrogen carbide/MOF composite material and preparation method thereof
  • Three-dimensional layered graphite-phase nitrogen carbide/MOF composite material and preparation method thereof
  • Three-dimensional layered graphite-phase nitrogen carbide/MOF composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A method for preparing a three-dimensional layered graphite phase nitrogen carbide / Cu-MOF composite material, comprising the steps of:

[0025] 1) g-C 3 N 4 Preparation of nanosheets

[0026] Spread 2 g of melamine powder on the bottom of a 50 mL crucible, close the lid tightly, transfer to a muffle furnace, raise the temperature to 550 °C at a rate of 2.3 °C / min and keep it for 4 h, then decrease to 550 °C at a rate of 2.3 °C / min. At room temperature, light yellow g-C 3 N 4 powder; then take 0.3g g-C 3 N 4 powder, add 200 mL deionized water, and after 150 W ultrasonic stripping for 6 h, the solution is centrifuged at 3000 rpm for 5 min to remove the unexfoliated solids in the lower layer, and the obtained supernatant is freeze-dried to obtain g-C 3 N 4 Nanosheet solid;

[0027] 2) Three-dimensional g-C 3 N 4 Preparation of Cu-MOF composites

[0028] Dissolve 1.087 g of copper nitrate trihydrate in 15 mL of water and add 10 mg of g-C 3 N 4 nanosheet solid; ...

Embodiment 2

[0030] A method for preparing a three-dimensional layered graphite phase nitrogen carbide / Cu-MOF composite material, comprising the steps of:

[0031] 1) g-C 3 N 4 Preparation of nanosheets

[0032] Spread 2 g of melamine powder on the bottom of a 50 mL crucible, close the lid tightly, transfer to a muffle furnace, raise the temperature to 550 °C at a rate of 2.3 °C / min and keep it for 4 h, then decrease to 550 °C at a rate of 2.3 °C / min. At room temperature, light yellow g-C 3 N 4 powder; then take 0.3g g-C 3 N4 powder, add 200 mL of deionized water, 150 W ultrasonic stripping for 12 h, centrifuge the solution at 3000 rpm for 5 min, remove the unexfoliated solids in the lower layer, and freeze-dry the obtained supernatant to obtain g-C 3 N 4 Nanosheet solid;

[0033] 2) Three-dimensional g-C 3 N 4 Preparation of Cu-MOF composites

[0034] Dissolve 1.087 g of copper nitrate trihydrate in 15 mL of water and add 5 mg of g-C 3 N 4 nanosheet solid; in addition, 0.525 g...

Embodiment 3

[0036] A method for preparing a three-dimensional layered graphite phase nitrogen carbide / Cu-MOF composite material, comprising the steps of:

[0037] 1) g-C 3 N 4 Preparation of nanosheets

[0038] Spread 2 g of melamine powder on the bottom of a 50 mL crucible, close the lid tightly, transfer to a muffle furnace, raise the temperature to 550 °C at a rate of 2.3 °C / min and keep it for 4 h, then decrease to 550 °C at a rate of 2.3 °C / min. At room temperature, light yellow g-C 3 N 4 powder; then take 0.3g g-C 3 N 4 powder, add 200 mL of deionized water, 150 W ultrasonic stripping for 24 h, centrifuge the solution at 3000 rpm for 5 min, remove the unexfoliated solids in the lower layer, and freeze-dry the obtained supernatant to obtain g-C 3 N 4 Nanosheet solid;

[0039] 2) Three-dimensional g-C 3 N 4 Preparation of Cu-MOF composites

[0040] Dissolve 1.087 g of copper nitrate trihydrate in 15 mL of water and add 15 mg of g-C 3 N 4 nanosheet solid; in addition, 0.52...

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Abstract

The invention discloses a three-dimensional layered graphite-phase nitrogen carbide / MOF composite material and a preparation method and an application thereof; the composite material is formed by compounding g-C3N4 nanosheets and a metal-organic frameworks material, wherein the g-C3N4 nanosheets account for 1%-25% by mass. The obtained composite material takes a nitrogen carbide material having a graphene-like two-dimensional structure after stripping as a template, has addition of a metal central ion and an organic ligand and is prepared by using an oil bath solvothermal method; compared with a pure metal-organic frameworks compound, the composite material has the pore size and the pore volume significantly increased. The preparation process is simple; the obtained composite material has ultra-high organic dye removal ability, is easy to regenerate, can be used repeatedly, and has good application prospects in the fields of environmental remediation, sewage treatment and separation science and the like.

Description

technical field [0001] The invention belongs to the field of material technology, and in particular relates to a three-dimensional layered graphite phase nitrogen carbide / MOF composite material and its preparation method and application. Background technique [0002] With the development of industrialization in our country, a large amount of organic dyes are discharged into the environment every year. These organic dyes are carcinogenic, teratogenic, mutagenic and other hazards, and have a great impact on the ecological environment and human health. As a traditional adsorption material, carbon materials play an important role in wastewater treatment and environmental remediation, but their relatively high cost and relatively small adsorption capacity limit the further extensive application of carbon materials. Therefore, it is necessary to find cheaper and stronger adsorption materials. [0003] Metal-Organic Frameworks (MOFs) materials are porous materials formed by the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28C02F1/28C02F101/30
CPCB01J20/02B01J20/226B01J20/2804C02F1/281C02F1/285C02F1/288C02F2101/308
Inventor 张兰黄川辉
Owner FUZHOU UNIV
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