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Preparation method of tin oxide composite tricobalt tetroxide photothermal catalyst and its application in thermal catalysis

A technology of tricobalt tetroxide light and tin oxide, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low thermal catalytic activity and achieve cheap and easy raw materials The effect of obtaining, not easy to inactivate, and improving stability

Active Publication Date: 2022-04-05
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many advantages, there are certain limitations in application
SnO 2 It is an n-type wide bandgap semiconductor with a bandgap energy of about 3.6ev and extremely low thermal catalytic activity

Method used

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  • Preparation method of tin oxide composite tricobalt tetroxide photothermal catalyst and its application in thermal catalysis
  • Preparation method of tin oxide composite tricobalt tetroxide photothermal catalyst and its application in thermal catalysis
  • Preparation method of tin oxide composite tricobalt tetroxide photothermal catalyst and its application in thermal catalysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Tin Oxide Composite Cobalt Tetroxide Photothermal Catalyst SnO 2 -Co 3 o 4

[0027] The preparation method is as follows:

[0028] 1. Cobalt tetraoxide Co 3 o 4 preparation of

[0029] 0.212g Na 2 CO 3 Add it to a mixed solution of 25ml of concentrated ammonia water (concentration: 28wt%) and 40ml of ethylene glycol, stir for 1 hour, and make it fully dissolve to obtain a mixed solvent. 1.45515g Co(NO 3 ) 2 .6H 2 O was added to the mixed solvent, and after stirring for 20 min, the resulting mixture was poured into a hydrothermal reaction kettle and kept at 170°C for 16 h. After natural cooling, centrifuge, put in an oven, dry at 60°C, grind the obtained solid, send it into a high-temperature furnace, heat up to 230°C at a heating rate of 5°C / min, and perform high-temperature calcination for 3 hours, cool, and grind to obtain co 3 o 4 .

[0030] 2. SnO 2 -Co 3 o 4 preparation of

[0031] 0.482g (0.002mol) Co 3 o 4 Dissolve in a mixture of 30mL et...

Embodiment 2

[0037] Example 2 application

[0038] (1) Effects of catalysts with different molar ratios on catalytic degradation of isopropanol under heating conditions

[0039] In the flow reaction device, under normal pressure, the tin oxide composite tricobalt tetroxide photothermal catalyst SnO with different molar ratios prepared in Example 1 was 2 -Co 3 o 4 Put into the reactor, feed isopropanol, carry out catalytic decomposition to isopropanol, flow gas is air (90ml / min), the reactor is heated up to 120 ℃, then starts to heat up, adopts thermocouple to measure temperature. The generated acetone was analyzed by gas chromatography with an FID detector (GC1690, Jiedao Technology Co., Ltd.). Record the peak area of ​​degrading isopropanol to generate acetone, and obtain the concentration change point line diagram of degrading isopropanol to generate acetone through calculation.

[0040] Depend on image 3 Visible, the SnO of the present invention 2 -Co 3 o 4 The concentration of...

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Abstract

The invention discloses a preparation method of a tin oxide composite tricobalt tetroxide photothermal catalyst and its application in thermal catalysis. Dissolve tricobalt tetroxide in the mixed solution of organic solvent and water, stir to dissolve, add tin salt and surfactant, continue to stir until completely dissolved; place the obtained mixture in a hydrothermal reaction kettle, and cool to room temperature after hydrothermal reaction , centrifuged, washed, and dried to obtain a precursor; the obtained precursor was calcined at 300-600° C. for 3-5 hours at a high temperature to obtain a tin oxide composite tricobalt tetroxide photothermal catalyst. The tin oxide composite tricobalt tetroxide oxygen-containing defect material prepared by the method of the present invention improves the SnO 2 Defects with low thermocatalytic activity lead to the generation of oxygen vacancies. Oxygen vacancies can trap electrons or holes generated by thermal excitation, effectively inhibit carrier recombination, and thus improve thermal catalytic activity. This method is low in cost and high in yield. It can degrade organic pollutants under dark and high temperature conditions.

Description

technical field [0001] The invention belongs to the technical field of thermocatalysis materials, and in particular relates to the preparation of tin oxide composite tricobalt tetroxide material and its application in thermocatalysis. Background technique [0002] In recent years, the problem of environmental pollution has become one of the main issues of global concern. Among the many environmental purification methods, various environmental catalytic technologies such as photocatalysis and thermal catalysis have attracted much attention. Thermocatalytic technology is an environmentally friendly technology that can directly use heat to degrade organic pollutants, and has the advantages of less pollution and recyclable use. [0003] SnO 2 Due to its good permeability to visible light, excellent chemical stability in aqueous solution, and specific conductivity and infrared radiation reflection characteristics, it is widely used in lithium batteries, solar cells, liquid cryst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/835B01J35/02B01D53/86B01D53/72B01J35/00
CPCB01J23/002B01J23/835B01D53/8668B01J35/00B01J35/30
Inventor 范晓星何盼韩宇成祥祥贾兰
Owner LIAONING UNIVERSITY
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