Preparation method of cerium oxide modified biomimetic catalyst

A technology of biomimetic catalyst and biochar, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc. Easy to fall off, lower specific surface area, etc., to improve reliability and durability, promote electron transfer ability, and improve removal efficiency

Active Publication Date: 2021-08-17
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, due to the small particle size of the rare earth metal oxide itself, it is easy to agglomerate, resulting in a decrease in the specific surface area and a decrease in the reaction rate; and when it is combined with biochar, the rare earth metal oxide is easy to fall off during use, resulting in a decrease in use efficiency. The research is limited to the stage of laboratory research, and there are many problems in practical application that need to be further explored

Method used

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  • Preparation method of cerium oxide modified biomimetic catalyst
  • Preparation method of cerium oxide modified biomimetic catalyst
  • Preparation method of cerium oxide modified biomimetic catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Plant water hyacinth in an incubator with Hoagland nutrient solution. After one week, dissolve nickel sulfate in distilled water and add it to the nutrient solution. The final concentration of nickel in the nutrient solution is 260mg / L, and cultivate for 60 days. During the cultivation period, the nutrient solution in the incubator was replaced at a period of 5 days. During the experiment, the pH of the aqueous solution in the incubator was kept within the range of 5.8 to 6.0. After the experiment, the water hyacinth was dried and pulverized to 12~ 13mm to obtain biomass.

[0077] Put the above biomass into a crucible, put the crucible into a tubular muffle furnace, heat up to 620°C at a heating rate of 4°C / min for pyrolysis, and pass argon into the tubular muffle furnace during the pyrolysis process , keep warm for 1.5h to prepare biochar.

[0078] The above biochar, cerium nitrate hexahydrate, and sodium hydroxide are carried out as follows in a weight ratio of 1:4:1...

experiment example 1

[0091] In two 250mL beakers, 100mL of 2,4-dichlorophenol solution with a concentration of 50mg / L was respectively added to 6ml of a 3g / L sodium persulfate solution, shaken for 90min, and then respectively added in Example 1 to obtain The biomimetic catalyst and 30 mg of the catalyst prepared in Comparative Example 1 were reacted for 120 min, and the concentration change of 2,4-dichlorophenol was recorded, and the change curve of the removal rate of 2,4-dichlorophenol over time was as follows: Figure 4 shown.

experiment example 2

[0093] Two 250mL beakers are respectively filled with 100mL concentration of 50mg / L Rhodamine-B solution, adding 6ml concentration of 3g / L sodium persulfate solution, shaking for 90min, then adding the biomimetic catalyst prepared in Example 1 wherein With catalyzer 30mg that comparative example 1 makes, react 120min, and record the concentration change of rhodamine-B, change curve of rhodamine-B removal rate with time as Figure 5 shown.

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Abstract

The invention discloses a preparation method of a cerium oxide modified biomimetic catalyst, wherein a nickel source is added in the growth process of Eichhornia crassipes, the Eichhornia crassipes absorbs nickel elements, and pyrolyzes the nickel elements, and then the nickel elements and a cerium compound are subjected to precipitation reaction under the action of sodium hydroxide, and biochar containing precipitate cerium oxide generated by the reaction is calcined at high temperature to prepare the biomimetic catalyst. The preparation method is simple, the prepared biomimetic catalyst contains the nickel element and the cerium oxide, and the nickel element and the cerium oxide are uniformly dispersed in the biochar, so that the electron transfer capability in the biomimetic catalyst is promoted, the removal rate of organic pollutants is improved, and the reliability and durability of the biomimetic catalyst as an environmental remediation material are further improved; and a new development thought is provided for preparation of the catalyst or the biomimetic catalyst.

Description

technical field [0001] The invention belongs to the technical field of environmental preparation, and in particular relates to a method for preparing a biomimetic catalyst modified by cerium oxide. Background technique [0002] Nowadays, with the rapid development of science and technology, the global economy has made great progress, and people's living standards have been greatly improved. At the same time, the energy crisis and environmental pollution problems brought about by economic development are becoming more and more serious. These pollutions not only seriously damage the ecological environment, but also endanger human health. Among the many pollution problems, the pollution of water bodies containing organic pollutants is one of the most serious problems. In recent years, the quality of water bodies in the world has been declining year by year. This not only affects the survival of aquatic organisms, but also pollutes the soil, resulting in reduced agricultural pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C02F1/72C02F101/34C02F101/38
CPCB01J23/83B01J23/002C02F1/722C02F1/725C02F2101/345C02F2101/40C02F2101/38
Inventor 张亚雷王雷周顺桂席北斗周雪飞陈家斌王小书王杨杨
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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