Preparation method and application of three-dimensional cubic CeO2/Mn2O3 composite photo-thermal catalyst

A three-dimensional cubic, catalyst technology, used in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., to achieve high redox activity, improved purity, and a wide range of sources.

Pending Publication Date: 2021-11-23
武汉理工大学深圳研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

mn 2 o 3 with CeO 2 The composite interface forms a heterojunction, and the photothermal synergistic effect can improve the catalytic activity for the degradation of toluene, and, Mn 2 o 3 Cubic composite mesoporous CeO 2 Nano-cuboid photothermal catalysts have not yet been reported

Method used

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  • Preparation method and application of three-dimensional cubic CeO2/Mn2O3 composite photo-thermal catalyst
  • Preparation method and application of three-dimensional cubic CeO2/Mn2O3 composite photo-thermal catalyst
  • Preparation method and application of three-dimensional cubic CeO2/Mn2O3 composite photo-thermal catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A three-dimensional cubic CeO 2 / Mn 2 o 3 A method for preparing a composite photothermal catalyst, comprising the steps of:

[0033] S100. Dissolve 22.5g of cerium nitrate hexahydrate and 9.3g of urea in 60ml of deionized water, and stir thoroughly to obtain a mixed solution I;

[0034] Transfer the mixed solution I to a high-pressure reactor, react at 180°C for 16 hours, and separate the white precipitate after cooling;

[0035] The white precipitate was washed and dried to obtain CeO 2 Precursor;

[0036] CeO 2 The precursor was calcined at 400 °C for 4 h in a muffle furnace to obtain mesoporous CeO 2 nano cuboid;

[0037] S200. Dissolve 4.6g of manganous chloride tetrahydrate and 4.5g of urea in 50ml of deionized water, stir thoroughly, and then add 0.04g of mesoporous CeO 2 nanometer cuboid to obtain mixed solution II;

[0038] Transfer the mixed solution II to the autoclave, incubate at 160°C for 12 hours, and separate the beige precipitate after cooling;...

Embodiment 2

[0043] A three-dimensional cubic CeO 2 / Mn 2 o 3 The preparation method of the composite photothermal catalyst adopts the same method as in Example 1, only the mesoporous CeO 2 The addition amount of nanocuboids was changed to 0.2g to obtain three-dimensional cubic CeO 2 / Mn 2 o 3 Composite photothermal catalyst, denoted as CeO 2 / Mn 2 o 3 -2.

[0044] like figure 1 Shown, CeO 2 / Mn 2 o 3 -2 sample XRD diffraction peak position and Mn 2 o 3 (JCPDS 24-0508) standard peak positions are the same, indicating that Mn in the composite catalyst 2 o 3 The phase did not change; by adding mesoporous CeO 2 Nano cuboid, CeO appears in the XRD pattern 2 XRD diffraction peaks (JCPDS 81-0792), indicating CeO 2 / Mn 2 o 3 -2 composite material was successfully prepared, and with the mesoporous CeO 2 With the increase of nanocuboid dosage, CeO 2 The intensity of the XRD diffraction peak increases with the increase, indicating that the CeO 2 / Mn 2 o 3 -2 CeO 2 content i...

Embodiment 3

[0047] A three-dimensional cubic CeO 2 / Mn 2 o 3 The preparation method of the composite photothermal catalyst adopts the same method as in Example 1, only the mesoporous CeO 2 The addition amount of nanocuboid is changed to 0.4g, and the three-dimensional cubic CeO 2 / Mn 2 o 3 Composite photothermal catalyst, denoted as CeO 2 / Mn 2 o 3 -3.

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Abstract

The invention relates to a preparation method of a three-dimensional cubic CeO2/Mn2O3 composite photo-thermal catalyst. The preparation method comprises the following steps: preparing a mesoporous CeO2 nano cuboid; adding the mesoporous CeO2 nano cuboid, manganous chloride tetrahydrate and urea into water, and heating in a water bath to obtain a catalyst precursor; and calcining the catalyst precursor to obtain the three-dimensional cubic CeO2/Mn2O3 composite photo-thermal catalyst. The three-dimensional cubic CeO2/Mn2O3 composite photo-thermal catalyst prepared by the preparation method is applied to photo-thermal catalytic degradation of VOCs. The preparation method has the beneficial effects that the raw materials for preparing the three-dimensional cubic CeO2/Mn2O3 composite photo-thermal catalyst are wide in source and easy to obtain; the volume or mass of each reactant is determined according to a reasonable ratio, so that the purity of the prepared product can be improved, and the photo-thermal catalytic degradation activity can be improved; the method has the advantages of simple operation, safety, low cost and the like.

Description

technical field [0001] The invention relates to the technical field of photothermal catalysts and new materials, in particular to a three-dimensional cubic CeO 2 / Mn 2 o 3 Preparation method and application of composite photothermal catalyst. Background technique [0002] At present, the traditional photocatalytic oxidation of organic pollutants has problems such as low photocatalytic utilization rate and catalyst deactivation caused by the deposition of reaction intermediate products on the surface of the catalyst; thermal catalytic conversion temperature is high, energy consumption is high, and thermal sintering, reaction process Poisoning of intermediate species or H 2 Poor stability caused by the occupation of active sites by O. Compared with single photocatalysis or thermocatalysis technology, light-driven thermocatalysis can effectively convert the absorbed solar energy into heat energy, which makes the temperature of the catalytic system rise, which not only reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J35/00B01J37/10B01J37/16B01D53/86B01D53/72B01D53/44
CPCB01J37/16B01J37/10B01J23/34B01J35/004B01D53/8687B01D53/8668B01D2259/802B01D2257/7027B01D2257/708
Inventor 张高科沈菡程强李源
Owner 武汉理工大学深圳研究院
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