Preparation method of porous ruthenium dioxide-cerium dioxide microsphere composite material

A technology of ruthenium dioxide and ceria, which is applied in the field of preparation of porous ruthenium dioxide-ceria microsphere composite materials, can solve the problems of low yield and low product quality, achieve simple preparation methods and improve catalytic activity , the effect of improving transfer efficiency

Pending Publication Date: 2021-06-25
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently about RuO 2 -CeO 2 The preparation of composite oxides mostly adopts mechanical blending method and impregnation-thermal decomposition method, but these methods have disadvantages such as low product quality and low yield, so it is necessary to develop a method for preparing RuO 2 -CeO 2 A New Approach to Composites

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  • Preparation method of porous ruthenium dioxide-cerium dioxide microsphere composite material
  • Preparation method of porous ruthenium dioxide-cerium dioxide microsphere composite material
  • Preparation method of porous ruthenium dioxide-cerium dioxide microsphere composite material

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Embodiment 1

[0028] This embodiment includes the following steps:

[0029] Step 1. Put RuCl 3 , RuCl 3 and NH 4 Cl is dissolved in deionized water to obtain a mixed salt solution; the solute RuCl in the mixed salt solution 3 , RuCl 3 and NH 4The total mass concentration of Cl is 10 g / L, and NH 4 The mass of Cl is 20% of the total mass of the solute, and the molar ratio of ruthenium to cerium is 3:10;

[0030] Step 2, adding the mixed salt solution obtained in step 1 into a spray dryer at a constant feeding rate for atomization drying to obtain mixed salt powder; the feeding rate of the mixed salt solution is 150 mL / h, and the atomization drying The temperature is 250℃;

[0031] Step 3: Put the mixed salt powder obtained in Step 2 into a tube furnace for calcination and oxidation treatment to obtain a porous ruthenium dioxide-ceria microsphere composite material; the process of the calcination and oxidation treatment is as follows: in an air atmosphere , heated to 650°C at a rate of...

Embodiment 2

[0036] This embodiment includes the following steps:

[0037] Step 1. Put RuCl 3 , Ce(NO 3 ) 3 and NH 4 Cl is dissolved in deionized water to obtain a mixed salt solution; the solute RuCl in the mixed salt solution 3 , Ce(NO 3 ) 3 and NH 4 The total mass concentration of Cl is 5 g / L, and NH 4 The mass of Cl is 20% of the total mass of the solute, and the molar ratio of ruthenium to cerium is 1:1;

[0038] Step 2, adding the mixed salt solution obtained in step 1 into a spray dryer at a constant feed rate for atomization drying to obtain mixed salt powder; the feed rate of the mixed salt solution is 250 mL / h, and the atomization drying The temperature is 300℃;

[0039] Step 3: Put the mixed salt powder obtained in Step 2 into a tube furnace for calcination and oxidation treatment to obtain a porous ruthenium dioxide-ceria microsphere composite material; the process of the calcination and oxidation treatment is as follows: in an air atmosphere , heated to 650°C at a ra...

Embodiment 3

[0041] This embodiment includes the following steps:

[0042] Step 1. Put RuCl 3 , Ce(NO 3 ) 3 and NH 4 Cl is dissolved in deionized water to obtain a mixed salt solution; the solute RuCl in the mixed salt solution 3 , Ce(NO 3 ) 3 and NH 4 The total mass concentration of Cl is 40 g / L, and NH 4 The mass of Cl is 20% of the total mass of the solute, and the molar ratio of ruthenium to cerium is 1:7;

[0043] Step 2, adding the mixed salt solution obtained in step 1 into a spray dryer at a constant feeding rate for atomization drying to obtain mixed salt powder; the feeding rate of the mixed salt solution is 50 mL / h, and the atomization drying The temperature is 200℃;

[0044] Step 3: Put the mixed salt powder obtained in Step 2 into a tube furnace for calcination and oxidation treatment to obtain a porous ruthenium dioxide-ceria microsphere composite material; the process of the calcination and oxidation treatment is as follows: in an air atmosphere , heated to 650°C a...

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Abstract

The invention discloses a preparation method of a porous ruthenium dioxide-cerium dioxide microsphere composite material, wherein the preparation method comprises the steps: 1, dissolving ruthenium salt, cerium salt and a foaming agent in deionized water to obtain a mixed salt solution; 2, adding the mixed salt solution into a spray dryer at a constant feeding rate for spray drying to obtain mixed salt powder; and 3, carrying out calcination oxidation treatment on the mixed salt powder to obtain the porous ruthenium dioxide-cerium dioxide microsphere composite material. A mixed salt solution prepared from ruthenium salt, cerium salt and a foaming agent is atomized and dried, process parameters are controlled to obtain micro-nano-scale mixed spherical powder, calcination oxidation treatment is carried out, the process parameters are controlled to form holes in particles, and the micro-nano scale porous ruthenium dioxide-cerium dioxide microsphere composite material is obtained; the composite material is uniform in particle size and has a high specific surface area, so that more catalytic active sites are exposed, and the composite material has excellent catalytic performance.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, in particular to a preparation method of a porous ruthenium dioxide-ceria microsphere composite material. Background technique [0002] With the continuous development of society, the problem of environmental pollution has become more and more serious. A large number of toxic and harmful waste liquids are difficult to be cleaned, and even directly discharged into rivers, lakes or soil, which poses a serious threat to human life and health. Although clean energy such as hydrogen energy, solar energy, wind energy, and nuclear energy has been vigorously developed, these energy sources are still difficult to meet industrial production, and traditional energy sources such as coal, oil and natural gas are still difficult to be replaced for a long time. Therefore, reducing the discharge of industrial waste liquid and purifying it are of great significance to the sustainable devel...

Claims

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Application Information

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IPC IPC(8): B01J23/63B01J35/08B01J35/10B01J37/00B01J37/08
CPCB01J23/63B01J23/002B01J37/0063B01J37/088B01J35/51B01J35/613
Inventor 戎万操齐高赵盘巢党蕊陈昆昆张卜升
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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