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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  • Abstract
  • Description
  • Claims
  • Application Information

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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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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 preparation method of a composite photocatalytic material of porous nano Fe3O4-N doped with Ni / Zn-MOFs / g-C3N4. The method comprises the steps that firstly, urea is calcined to prepare a graphite-phase carbon nitride (g-C3N4) material; then, by adopting ferric chloride, sodium acetate and ethanediamine as raw materials and ethylene glycol as a solvent, a constant-temperature reaction is conducted at 180-220 DEG C for 5-7 h, centrifugal separation is conducted to form solids, and Fe3O4 nano particles with porous structures are obtained; then, zinc nitrate hexahydrate, nickel nitrate hexahydrate, the g-C3N4 material and the Fe3O4 nano particles are added to a mixed solution of N,N-dimethylformamide and ethylene glycol, and a mixed reaction solution is obtained; the mixed reaction solution is transferred to a stainless steel reaction kettle with a polytetrafluoroethylene lining, the temperature is increased to 140-160 DEG C, a constant-temperature reaction is conducted for 5-7 h, centrifugal separation is conducted to form solids, and the composite photocatalytic material of Fe3O4-N doped with Ni / Zn-MOFs / g-C3N4 is obtained. The composite photocatalytic material is of a core-shell structure, g-C3N4 is used as a core, porous nano Fe3O4-N is dispersed on a shell of Ni / Zn-MOFs doped with N, and the material has obvious 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): B01J31/28B01J35/02B01J35/10C02F1/30C02F101/34C02F101/38
CPCB01J31/28B01J35/004B01J35/02B01J35/1019B01J35/1061B01J2531/26C02F1/30C02F2101/34C02F2101/38C02F2305/10
Inventor 周家斌张莹
Owner SOUTHWEST PETROLEUM UNIV
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