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a fe 3 o 4 -n-doped ni/zn-mofs/g-c 3 n 4 Preparation method of composite photocatalytic material

A composite photocatalysis, fe3o4-n technology, applied in the field of photocatalysis, can solve the problems of low utilization rate of light energy, wide band gap, etc., and achieve the effect of high photocatalytic activity, low cost, and simple and easy control of the reaction process

Active Publication Date: 2021-03-19
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems that existing metal-organic framework (MOFs) materials have a wide band gap, can only use ultraviolet light in sunlight, and have a low utilization rate of light energy

Method used

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  • a fe <sub>3</sub> o <sub>4</sub> -n-doped ni/zn-mofs/g-c <sub>3</sub> n <sub>4</sub> Preparation method of composite photocatalytic material
  • a fe <sub>3</sub> o <sub>4</sub> -n-doped ni/zn-mofs/g-c <sub>3</sub> n <sub>4</sub> Preparation method of composite photocatalytic material
  • a fe <sub>3</sub> o <sub>4</sub> -n-doped ni/zn-mofs/g-c <sub>3</sub> n <sub>4</sub> Preparation method of composite photocatalytic material

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Effect test

Embodiment 1

[0026] porous nano Fe 3 o 4 -N-doped Ni / Zn-MOFs / g-C 3 N 4 Composite photocatalytic materials (Fe 3 o 4 / N-Ni / Zn-MOFs / g-C 3 N 4 ) are prepared as follows:

[0027] Step S1, put the urea in the crucible, cover it, and roast it in a muffle furnace at a constant temperature of 550°C for 4h, with a heating rate of 10°C / min, cooling and grinding to obtain g-C 3 N 4 .

[0028] Step S2, FeCl 3 ·6H 2 O, sodium acetate and ethylenediamine are added to ethylene glycol, wherein FeCl 3 ·6H 2 The mass ratio of O, sodium acetate, ethylenediamine and ethylene glycol is 1:4:2:30, ultrasonically dispersed for 30min, and then magnetically stirred for 1h until the solid reactants are completely dissolved; In a stainless steel reaction kettle lined with tetrafluoroethylene, seal the reaction kettle, put the reaction kettle in an oven and heat it up to 200°C for a constant temperature reaction for 6 hours. After the reaction is completed, cool to room temperature, centrifuge to separat...

Embodiment 2

[0032] porous nano Fe 3 o 4 -N-doped Ni / Zn-MOFs / g-C3 N 4 Composite photocatalytic materials (Fe 3 o 4 / N-Ni / Zn-MOFs / g-C 3 N 4 ) are prepared as follows:

[0033] Step S1, dissolving urea in ultrapure water in advance, transferring the aqueous solution to a reaction kettle with a Teflon lining, reacting at a constant temperature of 200° C. for 12 hours, then cooling to room temperature, separating solid matter, washing, and drying; Put the dried urea in a crucible, cover it with a lid, and roast it in a muffle furnace at a constant temperature of 550°C for 4 hours, with a heating rate of 10°C / min, cooling and grinding to obtain g-C 3 N 4 .

[0034] Step S2, FeCl 3 ·6H 2 O, sodium acetate and ethylenediamine are added to ethylene glycol, wherein FeCl 3 ·6H 2 The mass ratio of O, sodium acetate, ethylenediamine and ethylene glycol is 1:4:2:30, ultrasonically dispersed for 30min, and then magnetically stirred for 1h until the solid reactants are completely dissolved; ...

Embodiment 3

[0038] porous nano Fe 3 o 4 -N-doped Ni / Zn-MOFs / g-C 3 N 4 Composite photocatalytic materials (Fe 3 o 4 / N-Ni / Zn-MOFs / g-C 3 N 4 ) are prepared as follows:

[0039] Step S1, put the urea in the crucible, cover it, and roast it in a muffle furnace at a constant temperature of 450°C for 4h with a heating rate of 10°C / min, cooling and grinding to obtain g-C 3 N 4 .

[0040] Step S2, FeCl 3 ·6H 2 O, sodium acetate and ethylenediamine are added to ethylene glycol, wherein FeCl 3 ·6H 2 The mass ratio of O, sodium acetate, ethylenediamine and ethylene glycol is 1:4:2:30, ultrasonically dispersed for 30min, and then magnetically stirred for 1h until the solid reactants are completely dissolved; In a tetrafluoroethylene-lined stainless steel reaction kettle, seal the reaction kettle, put the reaction kettle in an oven and heat it up to 180°C for a constant temperature reaction for 7 hours, cool to room temperature after the reaction, centrifuge to separate the solid, and was...

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Abstract

The invention discloses a porous nano Fe 3 O 4 ‑N-doped Ni / Zn‑MOFs / g‑C 3 N 4 The method for preparing composite photocatalytic materials is to first calcine urea to obtain graphite phase nitrogen carbide g‑C. 3 N 4 Materials; then use ferric chloride, sodium acetate, and ethylenediamine as raw materials, ethylene glycol as solvent, react at a constant temperature of 180-220°C for 5-7 hours, and centrifuge to separate the solid matter to obtain Fe with a porous structure. 3 O 4 Nanoparticles; secondly, zinc nitrate hexahydrate, nickel nitrate hexahydrate, g‑C 3 N 4 Material, Fe 3 O 4 Add the nanoparticles to the mixture of N,N-dimethylformamide and ethylene glycol to obtain a mixed reaction liquid; transfer the mixed reaction liquid to a stainless steel reactor lined with polytetrafluoroethylene and heat it to 140- React at a constant temperature of 160°C for 5-7 hours, then centrifuge to separate the solid matter to obtain Fe 3 O 4 / N-doped Ni / Zn‑MOFs / g‑C 3 N 4 Composite photocatalytic materials. The composite photocatalytic material obtained by the present invention has a core-shell structure, g-C 3 N 4 as core, porous nano-Fe 3 O 4 Dispersed on N-doped Ni / Zn‑MOFs shell, it has significant photocatalytic activity.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, in particular to a porous nano-Fe used for photocatalytic degradation of organic pollutants 3 o 4 -N-doped Ni / Zn-MOFs / g-C 3 N 4 Preparation method of composite photocatalytic material. Background technique [0002] The increasing global energy problems and environmental pollution problems have threatened the survival and development of human beings. In order to solve such problems, it is imminent to develop new materials to solve environmental pollution and energy problems. In recent years, semiconductor chemistry has aroused extensive research interest and enthusiasm of scientific and technological workers. Related semiconductor materials have shown high efficiency in the application of environmental and energy fields such as photocatalytic degradation of pollutants, solar energy conversion, and photolysis of water to produce hydrogen. [0003] Metal-organic framework (MOFs) material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28B01J35/02B01J35/10C02F1/30C02F101/34C02F101/38B01J35/00
CPCC02F1/30B01J31/28C02F2101/38C02F2101/34C02F2305/10B01J2531/26B01J35/00B01J35/30B01J35/647B01J35/615B01J35/39
Inventor 周家斌张莹
Owner SOUTHWEST PETROLEUM UNIV
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