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A ring-shaped copper-doped cerium oxide nanomaterial and its preparation and application

A technology of nanomaterials and ring structures, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve problems such as the difference in catalytic performance of cerium oxide nanomaterials, and achieve Good mercury removal effect, enhanced activity, enhanced catalytic performance

Active Publication Date: 2019-03-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the catalytic performance of cerium oxide nanomaterials with different morphologies and structures is also very different.

Method used

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  • A ring-shaped copper-doped cerium oxide nanomaterial and its preparation and application
  • A ring-shaped copper-doped cerium oxide nanomaterial and its preparation and application
  • A ring-shaped copper-doped cerium oxide nanomaterial and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 0.143g of cerium nitrate, 0.068g of copper chloride and 0.5g of polyvinylpyrrolidone into 30mL of deionized water, stir magnetically for 10min until it is completely dissolved, then add 2.196g of urea into the reaction solution, stir for 30min, and add the mixture to In a hydrothermal reactor. Put the reaction kettle into an oven and keep the temperature at 150°C for 10h. Then the obtained mixed solution was washed three times with deionized water and twice with ethanol, dried in an oven at 60° C. for 10 hours, and finally calcined in a muffle furnace at 500° C. for 4 hours to obtain a ring-shaped nanomaterial of copper doped cerium oxide.

Embodiment 2

[0028] Add 0.143g of cerium nitrate, 0.097g of copper nitrate and 0.5g of polyvinylpyrrolidone into 30mL of deionized water, stir magnetically for 10min until it is completely dissolved, then add 2.196g of urea into the reaction solution, stir for 30min, and add the mixture to the hydrothermal in the reactor. Put the reaction kettle into an oven and keep the temperature at 150°C for 10h. Then the obtained mixed solution was washed three times with deionized water and twice with ethanol, dried in an oven at 60° C. for 10 hours, and finally calcined in a muffle furnace at 500° C. for 4 hours to obtain a ring-shaped nanomaterial of copper doped cerium oxide.

Embodiment 3

[0030] Under the condition of 200°C, the materials prepared in Example 1 were used as the catalyst treatment concentration of 75 μg / m 3 Hg 0 Steam, space velocity is 150000h -1 , at N 2 Under the condition of carrier gas, after feeding 4% oxygen, the mercury removal effect can reach more than 98.5%.

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Abstract

The invention discloses a cyclic structure copper-doped cerium oxide nanomaterial, its preparation and its application in mercury removal. It includes the following steps: using a certain proportion of cerium nitrate and copper salt as raw materials, using urea as an alkali source, and polyvinylpyrrolidone as a surfactant, mixing and hydrolysis reaction, and the obtained mixture is stored at a constant temperature with hydrothermal energy, washed and dried, and then After calcination, copper-doped cerium oxide with regular morphology, uniform size and complete ring-like nanostructure is obtained. The copper-doped cerium oxide nanomaterial prepared by the invention has a novel structure, simple and easy-to-obtain raw materials, simple procedures, clean reaction process, and no secondary pollution. It is used to remove mercury in the atmosphere. The method is simple and the mercury removal effect is good. The treatment concentration is 75μg / m 3 Hg 0 When steam is introduced with 4% oxygen, the mercury removal rate can reach more than 98% and the stability is good.

Description

technical field [0001] The invention relates to the field of nanomaterial preparation technology, in particular to a ring-shaped copper-doped cerium oxide nanomaterial, its preparation and its application in mercury removal. Background technique [0002] Cerium oxide is an extremely versatile rare earth oxide with rapidly switchable Ce 3+ / C 4+ , superior oxygen storage and release function, high temperature and rapid oxygen vacancy diffusion ability, are widely used in the field of catalysis. When the size of the material is controlled at the nanometer size, it exhibits unique physical and chemical properties, which is conducive to improving its catalytic activity. Moreover, the catalytic properties of cerium oxide nanomaterials with different morphologies and structures are also very different. [0003] In recent years, some cerium oxide nanomaterials with a single crystal structure have been obtained. It has superior performance in terms of surface area and permeabili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J35/02B01D53/86B01D53/64B01J35/00
CPCB01D53/8665B01J23/83B01J35/40
Inventor 杨卫春柴立元李超芳刘恢王海鹰唐崇俭闵小波杨志辉
Owner CENT SOUTH UNIV
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