Preparation method of 0D/3D Fe2O3 QDs/g-C3N4 hybrid photo-Fenton catalyst

A g-c3n4, catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as increasing the difficulty of separation

Pending Publication Date: 2021-09-10
XINXIANG MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the thinner and finer dimensions of 2D materials increase the difficulty of separating them from catalyst suspensions

Method used

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  • Preparation method of 0D/3D Fe2O3 QDs/g-C3N4 hybrid photo-Fenton catalyst
  • Preparation method of 0D/3D Fe2O3 QDs/g-C3N4 hybrid photo-Fenton catalyst
  • Preparation method of 0D/3D Fe2O3 QDs/g-C3N4 hybrid photo-Fenton catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0024] First, dissolve 2.0g melamine and 2.0g cyanuric acid in 100mL ultrapure water and stir for 12h; then transfer the above solution to a glass dish and dry at 60°C for 12h; After annealing for 4 hours, a yellowish 3D porous g-C 3 N 4 sample. Take 0.9g of the above 3D porous g-C 3 N 4 Disperse the sample in 100mL ethanol, stir magnetically for 2h to achieve uniform dispersion to obtain g-C 3 N 4 Ethanol dispersion, add 0.27g FeCl to the above dispersion 3 ·6H 2 O and 0.24gNH 4 HCO 3 And stirred for 12h, the product was centrifuged, washed, and dried overnight at 60°C; annealed at 350°C for 2h to obtain Fe 2 o 3 QDs / g-C 3 N 4 Photo-Fenton catalyst.

Embodiment 2

[0026]First, dissolve 2.0g melamine and 2.0g cyanuric acid in 100mL ultrapure water and stir for 12h; then transfer the above solution to a glass dish and dry at 60°C for 12h; After annealing for 4 hours, a yellowish 3D porous g-C 3 N 4 sample. Take 1.5g of the above 3D porous g-C 3 N 4 Disperse the sample in 100mL ethanol, stir magnetically for 2h to achieve uniform dispersion to obtain g-C 3 N 4 Ethanol dispersion, add 0.27g FeCl to the above dispersion 3 ·6H 2 O and 0.24gNH 4 HCO 3 And stirred for 12h, the product was centrifuged, washed, and dried overnight at 60°C; annealed at 350°C for 2h to obtain Fe 2 o 3 QDs / g-C 3 N 4 Photo-Fenton catalyst.

Embodiment 3

[0028] Get 80mL concentration and be 20mg / L RhB solution, add the Fe prepared in embodiment 2 again 2 o 3 QDs / g-C 3 N 4 Light Fenton catalyst, stirred in dark light for 10min, sampled and filtered for analysis, then added 1.5mL of hydrogen peroxide (H 2 o 2 , 30wt%), turn on the light source, start timing, take samples and filter at 20min, 40min, 60min, and 80min for analysis. After reacting under visible light for 60min, the removal rate of RhB in the solution is greater than 99%. For details, see Figure 5 .

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Abstract

The invention discloses a preparation method of a 0D/3D Fe2O3 QDs/g-C3N4 hybrid photo-Fenton catalyst. The method comprises the following steps: by taking melamine and cyanuric acid as raw materials, preparing g-C3N4 with a three-dimensional porous structure by adopting a one-step calcination method; and mixing three-dimensional g-C3N4, FeCl3. 6H2O and NH4HCO3 according to a proper ratio, and carrying out simple self-assembly to synthesize the Fe2O3 QDs/g-C3N4 photo-Fenton catalyst. The catalyst has good visible light response, excellent harmful pollutant degradation capacity and recycling stability, and has a wider working range compared with a classical photo-Fenton catalyst; and the preparation method is simple in process, low in raw material cost and easy for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of preparation of photo-Fenton catalysts for degrading environmental pollutants, in particular to a 0D / 3D Fe 2 o 3 QDs / g-C 3 N 4 Preparation method of hybrid photo-Fenton catalyst. Background technique [0002] Iron-based catalysts are widely used in heterogeneous Fenton due to their low toxicity, low cost, and high enrichment, but their catalytic activity is usually low, and Fe 3+ -Fe 2+ The conversion between them is slow, and iron is leached under high acid conditions, causing catalyst loss. Therefore, researchers are enhancing Fe 2+ Many efforts have been made on the Fenton reaction of based catalysts, in which the introduction of semiconducting materials into Fe 2+ based catalysts to enhance their catalytic activity. [0003] The introduction of semiconductor materials promotes the Fe 3+ -Fe 2+ conversion, improving the degradation efficiency, where Fe 2 o 3 considered as the most promising ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/03B01J37/08C02F1/30C02F1/72C02F101/30
CPCB01J27/24B01J35/004B01J35/0013B01J37/082B01J37/031C02F1/30C02F1/722C02F1/725C02F2305/10C02F2305/026C02F2101/308
Inventor 刘冬倪天军张丰泉李春灵赵茜高霞杨中智
Owner XINXIANG MEDICAL UNIV
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