Photo-Fenton catalyst and preparation method thereof and application thereof in water treatment

A catalyst and solvent technology, which is applied in the direction of light water/sewage treatment, oxidized water/sewage treatment, water/sewage treatment, etc., can solve the problems of reducing the degradation efficiency of organic matter, reducing surface active sites, and prone to agglomeration, etc., to achieve improved catalysis performance, improved photogenerated charge separation and transport, and faster conversion effects

Inactive Publication Date: 2020-09-15
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Due to the high surface energy of nanoparticle catalysts, it is easy to agglomerate, thereby reducing the surface active sites and reducing the degradation efficiency of organic matter
[0005] (2) due to Fe 3+ to Fe 2+ The conversion rate of these nanoparticles is low, and the catalytic efficiency of these nanoparticles as photo-Fenton catalysts needs to be further improved

Method used

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  • Photo-Fenton catalyst and preparation method thereof and application thereof in water treatment
  • Photo-Fenton catalyst and preparation method thereof and application thereof in water treatment
  • Photo-Fenton catalyst and preparation method thereof and application thereof in water treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0041] (1) Add 30g of urea to the crucible, add the crucible cover, and heat at 2.5°C min -1 Heating at a rate of 550°C for 4h, adding the resulting product back into the crucible without the crucible lid, and then heating at 2°C min -1 The rate is heated to 500°C for 2h to obtain g-C 3 N 4 Nanosheets;

[0042] (2) the g-C obtained in step (1) 3 N 4 The nanosheets were added to the ethanol solution at a concentration of 2.0 g L -1 , sonicate until the dispersion is uniform, add ferric nitrate and ammonium bicarbonate to the dispersion in turn, so that the concentrations are 1.0 and 3.0mol L -1 , stirred for 10 h, separated by filtration, washed with deionized water and dried, and the dried product was heated at 2°C min -1 The rate is heated to 350 ° C for 2 h to obtain g-C 3 N 4 / Fe 2 o 3 Complex.

[0043] Characterization tests:

[0044] 1. The light-Fenton catalyst g-C prepared for this embodiment 3 N 4 / Fe 2 o 3 Take a transmission electron microscope, figu...

Embodiment 2

[0047] (1) Add 30g of urea to the crucible, add the crucible cover, and heat at 1.0°C min -1 The rate was heated to 550°C for 2h, and the resulting product was re-added to the crucible without the crucible lid, and then heated at 1.0°C min -1 The rate is heated to 500°C for 2h to obtain g-C 3 N 4 Nanosheets;

[0048] (2) the g-C obtained in step (1) 3 N 4 The nanosheets were added to the ethanol solution at a concentration of 4.0 g L -1 , Ultrasonic dispersion, add iron nitrate and ammonium bicarbonate to the dispersion in turn, the concentration is 1.0 and 3.0mol L -1 , stirred for 10h, separated by filtration, washed with deionized water and dried, and the dried product was heated at 1.0°C min -1 The rate is heated to 300 ° C for 2 h to obtain g-C 3 N 4 / Fe 2 o 3 Complex.

Embodiment 3

[0050] (1) Add 60g of urea to the crucible, add the crucible cover, and heat at 5.0°C min -1 Heating at a rate of 550°C for 4h, adding the resulting product back into the crucible without the crucible lid, and then heating at 5.0°C min -1 The rate is heated to 500 ° C for 4 h to obtain g-C 3 N 4 Nanosheets;

[0051] (2) The g-C obtained in step (1) will be 3 N 4 The nanosheets were added to the ethanol solution at a concentration of 10.0 g L -1 , ultrasonically disperse, add ferric nitrate and ammonium bicarbonate to the dispersion in turn, the concentrations are 10.0 and 30.0mol L -1 , stirred for 10h, separated by filtration, washed with deionized water and dried, and the dried product was heated at 5.0°C min -1 The rate is heated to 400 ° C for 4 h to obtain g-C 3 N 4 / Fe 2 o 3 Complex.

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Abstract

The invention discloses a photo-Fenton catalyst and a preparation method and application thereof in water treatment, and belongs to the technical field of water treatment. The invention provides a method for preparing a g-C3N4 / Fe2O3 compound catalyst. The g-C3N4 / Fe2O3 compound catalyst is used for carrying out photo-Fenton water treatment. The preparation method comprises the following steps: firstly, preparing a g-C3N4 nanosheet, and then carrying out composite modification on the g-C3N4 nanosheet by taking ferric nitrate and ammonium bicarbonate as raw materials to obtain a g-C3N4 / Fe2O3 compound. According to the g-C3N4 / Fe2O3 photo-Fenton catalyst prepared by the method, fe2O3 quantum dots are loaded on the surface of the g-C3N4 nanosheet in a fixed-point deposition manner, and thus morecatalytic active sites and larger reaction contact area are brought about; when the catalyst is used for degrading antibiotic pollutants in water, the catalytic performance is excellent, the degradation efficiency of the antibiotic pollutants is high, the operation cost is low, secondary pollution cannot be caused, and the catalyst has a wide application prospect.

Description

technical field [0001] The invention relates to a photo-Fenton catalyst, a preparation method thereof and an application in water treatment, belonging to the technical field of water treatment. Background technique [0002] In recent years, the pollution of antibiotics to the environment has become increasingly serious, and antibiotic residues are frequently detected in water bodies. The accumulation of antibiotics in water can induce the emergence of drug-resistant strains, leading to changes in microbial flora, which in turn endangers human health and ecological security. Photo-Fenton oxidation technology mainly uses light excitation to accelerate Fe 2+ regeneration and activation of H 2 o 2 、H 2 Small molecules such as O and dissolved oxygen accelerate the active oxygen radicals (·OH, ·O 2 - etc.) to oxidatively degrade organic pollutants. With the advantages of simple operation, mild reaction conditions, fast reaction rate, and high mineralization efficiency, this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/72C02F1/30C02F103/34C02F101/38C02F101/34
CPCB01J27/24C02F1/30C02F1/722C02F1/725C02F2101/34C02F2101/38C02F2103/343C02F2209/02
Inventor 赵辉田成梅剑杨士建
Owner JIANGNAN UNIV
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