Fenton-like catalytic material having double reactive active centers and preparation method thereof

A dual-reaction activity, catalytic material technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of large reaction mass transfer resistance, low utilization rate of hydrogen peroxide, etc., to improve the utilization rate , Good catalytic activity, good stability, and the effect of wide pH response range

Inactive Publication Date: 2019-01-11
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a Fenton-like catalytic material with double reaction active centers and a preparation method thereof for the problems of large reaction mass transfer resistance and low utilization rate of hydrogen peroxide in the current research and application of Fenton-like technology

Method used

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  • Fenton-like catalytic material having double reactive active centers and preparation method thereof
  • Fenton-like catalytic material having double reactive active centers and preparation method thereof
  • Fenton-like catalytic material having double reactive active centers and preparation method thereof

Examples

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Effect test

Embodiment 1

[0042] A preparation method of a Fenton-like catalytic material with double reactive active centers, comprising the steps of:

[0043] (1) Put 10g of urea into a corundum crucible, heat up to 550°C in a muffle furnace at a rate of 5°C / min for calcination, and keep it warm for 4 hours to obtain a powdery product carbon nitride A; then the product A Dissolve in deionized water and stir to form a suspension solution B; wherein the mass fraction of product A carbon nitride is 4.5%;

[0044] (2) Take 40mL of deionized water, add 6.0g aluminum nitrate nonahydrate, 0.18g copper nitrate trihydrate and 4.0g glucose, stir for 30min to form solution C;

[0045] (3) Add the suspension solution B prepared in step (1) dropwise to solution C, stir at a rate of 100r / min for 30min, then transfer it to a polytetrafluoroethylene reactor, and seal the water under the condition of 200°C After thermal reaction for 20 h, the product was washed with water, centrifuged and dried to obtain solid D;

...

Embodiment 2

[0049] A preparation method of a Fenton-like catalytic material with double reactive active centers, comprising the steps of:

[0050] (1) Put 12g of urea into a corundum crucible, heat up to 550°C in a muffle furnace at a rate of 5°C / min for calcination, and then keep it warm for 4 hours to obtain a powdery product carbon nitride A; then the product A Dissolve in deionized water and stir to form a suspension solution B; wherein the mass fraction of product A carbon nitride is 4.5%;

[0051] (2) Take 80mL of deionized water, add 6.5g of aluminum nitrate nonahydrate, 0.24g of copper nitrate trihydrate and 4.5g of glucose, and stir for 30min to form solution C;

[0052] (3) Add the suspension solution B prepared in step (1) dropwise to solution C, stir at a rate of 120r / min for 30min, then transfer it to a polytetrafluoroethylene reactor, and seal the water under the condition of 200°C After thermal reaction for 18 h, the product was washed with water, centrifuged and dried to ...

Embodiment 3

[0056] A preparation method of a Fenton-like catalytic material with double reactive active centers, comprising the steps of:

[0057] (1) Put 15g of urea into a corundum crucible, heat up to 550°C in a muffle furnace at a heating rate of 5°C / min, and then heat it for 4 hours to obtain a powdered product carbon nitride A; then the product A Dissolve in deionized water and stir to form a suspension solution B; wherein the mass fraction of product A carbon nitride is 3.0%;

[0058] (2) Take 60mL of deionized water, add 7.0g aluminum nitrate nonahydrate, 0.35g copper nitrate trihydrate and 5.0g glucose, stir for 30min to form solution C;

[0059](3) Add the suspension solution B prepared in step (1) dropwise to solution C, stir at a rate of 150r / min for 30min, then transfer it to a polytetrafluoroethylene reactor, and seal the water under the condition of 200°C After thermal reaction for 18 h, the product was washed with water, centrifuged and dried to obtain solid D;

[0060] ...

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Abstract

The invention discloses a preparation method of a Fenton-like catalytic material having double reactive active centers. The preparation method comprises: (1) placing a nitrogen-containing compound ina muffle furnace, calcining the nitrogen-containing compound and dissolving the product in deionized water to form a suspension solution, (2) dissolving aluminum nitrate nonahydrate, copper nitrate trihydrate and glucose in deionized water to obtain a solution C, (3) adding the suspension solution into the solution C drop by drop, carrying out a closed hydrothermal reaction process and carrying out washing, centrifugation and drying to obtain solids, and (4) calcining the solids in the muffle furnace to obtain the Fenton-like catalytic material. The catalytic material has a complete spheroidalflower-like mesoporous structure with a large specific surface area and can expose more catalytic active sites, so that H2O2 undergoes a reduction reaction at the electron-rich center as much as possible during the reaction to generate hydroxyl radicals. The novel catalytic material has good removal effects on various toxic and harmful organic pollutants under neutral conditions, and can achievehighly selective conversion of H2O2.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a Fenton-like catalytic material with double reaction active centers and a preparation method thereof. Background technique [0002] As an advanced oxidation technology, the Fenton reaction has been widely used in the field of water pollution control. The mechanism of the classic Fenton reaction process is that the low-valence metal active species is absorbed by H 2 o 2 Hydroxyl radicals (•OH) and superoxide radicals (HO 2 • / O 2 •-), and the metals that are oxidized to high valence states will be further absorbed by H 2 o 2 It is reduced to low-valence metals to realize the cycle of low-valence and high-valence metals. However, the traditional Fenton treatment technology has the following defects: (1) the reaction needs to be carried out at an acidic pH value, and a large amount of iron sludge will be generated during the reaction; (2) the reaction rate c...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/08B01J35/10B01J37/08B01J37/10C02F1/72C02F101/30C02F101/34C02F101/36C02F101/38
CPCC02F1/722C02F1/725B01J27/24B01J37/082B01J37/10C02F2305/026C02F2101/308C02F2101/36C02F2101/345C02F2101/34C02F2101/38B01J35/51B01J35/615B01J35/633B01J35/647B01J35/30
Inventor 王津南徐苏倩文质斌
Owner NANJING UNIV
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