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 copper-doping cerium oxide nano material of a cyclic structure, and a preparation method and an application thereof in mercury removal. The preparation method comprises the following steps: adopting cerium nitrate and copper salt in a given ratio as raw materials, adopting urea as an alkaline source, adopting polyvinylpyrrolidone as a surfactant, mixing, performing the hydrolysis reaction, storing an obtained mixture at a constant temperature in a hydrothermal manner, washing, drying, calcining, and obtaining copper-doping cerium oxide of a cyclic nano structure with regular appearance and uniform and complete size. The copper-doping cerium oxide nano material prepared by the invention is novel in structure, simple and easy for getting the raw materials, simple in procedures, clean in reaction process, and free from secondary pollution. The copper-doping cerium oxide nano material is applied to the removal of mercury in the air. The method is simple, the mercury removal effect is good, the treatment concentration is 75 micrograms / m<3> HgO vapor, the mercury removal rate can reach 98 percent or higher by introducing 4 percent of oxygen, 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): B01J23/83B01J35/02B01D53/86B01D53/64
CPCB01D53/8665B01J23/83B01J35/023
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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