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High-stability ordered mesoporous carbon loaded Fenton catalyst, and preparation method and application thereof

A high-stability, mesoporous carbon technology, used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as plugging pores, achieve good degradation effect, wide range of pH use, and active high effect

Active Publication Date: 2017-06-16
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the impregnation method and co-assembly method are generally used to support metals and metal oxide catalysts in ordered mesoporous carbons. Because the surface of mesoporous carbons is relatively hydrophobic, the impregnation method mainly uses the capillary force of mesoporous carbons to infuse metal precursors into In the tunnel, but generally gather at the mouth of the tunnel, there will be a phenomenon of hole blocking

Method used

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  • High-stability ordered mesoporous carbon loaded Fenton catalyst, and preparation method and application thereof
  • High-stability ordered mesoporous carbon loaded Fenton catalyst, and preparation method and application thereof
  • High-stability ordered mesoporous carbon loaded Fenton catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Mix 1 g of ordered mesoporous carbon with 30 mL of 1M ammonium persulfate, heat and condense to reflux at 60 °C for 24 h, filter the reaction solution after cooling, wash the reaction product with deionized water, and dry in vacuum for 12 h to obtain the ordered wet oxidation treatment. mesoporous carbon.

[0038] Take 0.1 g of ordered mesoporous carbon after wet oxidation treatment and add it into 25 mL of 0.14 M ferric nitrate solution, stir overnight, wash and filter with deionized water. Transfer the washed product to a beaker, add 5 mL of deionized water, then quickly add 9 mL of 5M NaOH, and finally add 86 mL of deionized water. The reaction solution was transferred to a 100mL polytetrafluoroethylene reactor, and heated at 70°C for 12h. After cooling, filter the reaction liquid, wash the reaction product with deionized water and absolute ethanol several times, and obtain α-FeOOH / MesoC-12 after vacuum drying. figure 1 As shown, the X-ray diffraction pattern is sh...

Embodiment 2

[0045] This example is a modification example of Example 1, and the technical scheme is the same as that of Example 1, except that the hydrothermal time at 70° C. is 36 hours, and the obtained product is α-FeOOH / MesoC-36. Its scanning electron microscope picture is as follows figure 2 As shown, the X-ray diffraction pattern is shown in Figure 4 shown.

[0046] Add 30mgα-FeOOH / MesoC-36 to 60mL 100mg / L rhodamine B solution, adjust the pH to 7, stir for 30 minutes to reach adsorption equilibrium, add 180μL H 2 o 2 , the decolorization effect of Rhodamine B reached 93% after 90 minutes.

[0047] Add 10 mgα-FeOOH / MesoC-36 to 20 mL of 100 mg / L phenol solution, adjust the pH to 5, stir for 30 minutes to reach adsorption equilibrium, then add 60 μL H 2 o 2 , producing 9.4 μmol CO in 2 h 2 .

Embodiment 3

[0049] This example is a modification example of Example 1, and the technical scheme is the same as that of Example 1, except that the hydrothermal time at 70° C. is 60 h, and the obtained product is α-FeOOH / MesoC-60. Its scanning electron microscope picture is as follows image 3 As shown, the X-ray diffraction pattern is shown in Figure 4 shown.

[0050] Add 30mgα-FeOOH / MesoC-60 to 60mL 100mg / L rhodamine B solution, adjust the pH to 7, stir for 30 minutes to reach adsorption equilibrium, add 180μL H 2 o 2 , the decolorization effect of Rhodamine B reached 94% after 90 minutes.

[0051] Add 10 mgα-FeOOH / MesoC-60 to 20 mL of 100 mg / L phenol solution, adjust the pH to 5, stir for 30 minutes to reach adsorption equilibrium, add 60 μL H 2 o 2 , producing 5.5 μmol CO in 2 h 2 .

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Abstract

The invention discloses a preparation method and application of a high-stability ordered mesoporous carbon loaded Fenton catalyst. The catalyst comprises a carrier and alpha-FeOOH growing on the surface of the carrier, wherein the carrier is ordered mesoporous carbon having undergone wet oxidation treatment. The preparation method comprises the following steps: subjecting ordered mesoporous carbon to wet oxidation treatment; then carrying out washing and drying, and soaking the ordered mesoporous carbon in a ferric nitrate solution; and subjecting a material obtained in the previous step to washing and drying and then to hydrothermal treatment in aqueous alkali so as to obtain the ordered mesoporous carbon supported Fenton catalyst. The catalyst prepared in the invention has good hydrophilicity and can be uniformly dispersed in water; aciculiform alpha-FeOOH grows on the surface of ordered mesoporous carbon, and the loading amount of ordered mesoporous carbon is adjustable; when applied to decolouring and phenol degradation of rhodamine B, the Fenton catalyst has good degradation effect in a wide pH scope; and the Fenton catalyst has the advantages of high activity, good stability, a wide pH application scope and small iron loss, and overcomes the problem that conventional homogeneous Fenton reactions produce iron-containing sludge and are restricted by the pH value of sewage.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a preparation method and application of a high-stability ordered mesoporous carbon-supported Fenton catalyst. Background technique [0002] The Fenton reaction is an advanced oxidation technique widely used in organic wastewater treatment. The traditional homogeneous Fenton reagent utilizes Fe 2+ activated H 2 o 2 The generation of ·OH can degrade pollutants efficiently and quickly, but only under the condition of low pH value (pH2-3), in addition, it will also cause secondary pollution of iron salt mud. In response to the problems caused by homogeneous Fenton, heterogeneous Fenton catalysts have been developed, and heterogeneous Fenton reagents mainly include iron oxides, iron minerals, and iron-containing solid compounds. In order to improve the dispersibility of the above-mentioned iron-containing compounds, porous carriers are often used as carriers to disperse iron-containing ac...

Claims

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Application Information

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IPC IPC(8): B01J23/745C02F1/72C02F101/34C02F101/30
CPCC02F1/725B01J23/745B01J37/0201B01J37/10C02F2101/308C02F2101/345C02F2305/026B01J35/391B01J35/56
Inventor 钱旭芳赵一新任孟祝瑶岳东亭张太阳阚淼
Owner SHANGHAI JIAO TONG UNIV
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