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Preparation method of monodisperse cerium oxide loose nanospheres

A technology of nano balls and cerium oxide, which is applied in the field of nano materials and achieves the effects of simple preparation method, mild reaction conditions and low price

Inactive Publication Date: 2014-04-30
ANHUI UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The hydrothermal carbonization method is to add carbohydrates to the hydrothermal reactor to prepare carbonaceous materials with different shapes. growth has not yet been reported

Method used

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  • Preparation method of monodisperse cerium oxide loose nanospheres
  • Preparation method of monodisperse cerium oxide loose nanospheres
  • Preparation method of monodisperse cerium oxide loose nanospheres

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Experimental program
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Effect test

Embodiment 1

[0035] (1) Weigh 0.5gCe(NO 3 ) 3 ·6H 2 O is dissolved in 50ml distilled water and is mixed with cerium nitrate mother liquor, is transferred in the 70ml hydrothermal reaction kettle;

[0036] (2) Weigh 1g of urea and transfer it to the hydrothermal reaction kettle in step (1), dissolve it in the mother liquor of cerium nitrate, and stir to make it completely dissolved;

[0037] (3) Seal the hydrothermal reaction kettle in step (2), put it into a constant temperature blast drying oven at 200 °C for 2 hours, centrifuge the obtained suspension, wash the precipitate with water for 3 times, and dry the obtained white powder at 60 °C That is, basic cerium carbonate micron cone material;

[0038] (4) Calcining the basic cerium carbonate microcone material obtained in step (3) at 300 °C for 3 hours to obtain 0.1805 g of light yellow nano-cerium oxide powder with a yield of 91.1%, and the product is cerium oxide microcone.

[0039] figure 1 For the SEM figure of the cerium oxide ...

Embodiment 2

[0045] (1) Weigh 0.5gCe(NO 3 ) 3 ·6H 2 O is dissolved in 50ml distilled water and is mixed with cerium nitrate mother liquor, is transferred in the 70ml hydrothermal reaction kettle;

[0046] (2) Weigh 1g of urea and 6g of glucose, transfer them to the hydrothermal reaction kettle in step (1), dissolve them in the cerium nitrate mother liquor, and stir to make them completely dissolve;

[0047] (3) Seal the hydrothermal reaction kettle in step (2), put it into a constant temperature blast drying oven at 200 °C for 2 hours, centrifuge the obtained suspension, wash the precipitate with water for 3 times, and dry the resulting brown powder at 60 °C That is, carbon-coated basic cerium carbonate core-shell structure nanomaterials;

[0048] (4) Calcining the carbon-coated basic cerium carbonate core-shell nanomaterial obtained in step (3) at 300 °C for 3 hours to obtain 0.1912 g of light yellow nano-cerium oxide powder with a yield of 96.5%, and the product is monodisperse cerium...

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Abstract

The invention discloses a preparation method of monodisperse cerium oxide loose nanospheres. The preparation method comprises the following steps: with a carbohydrate as a morphological controller and urea as a precipitant, preparing an alkali-in-carbon type cerous carbonate precursor by a hydrothermal method; and then, carrying out high-temperature thermal treatment to obtain the monodisperse CeO2 loose nanospheres with high specific surface area. The particle size of the nanospheres is 50nm, and the specific surface area of the nanospheres calcined at 300 DEG C reaches 165m<2> / g. According to the preparation method disclosed by the invention, the carbohydrate hydrothermal carbonization method is used for preparing the cerium oxide material for the first time, the whole reaction process is carried out in a hydrothermal kettle, the reaction condition is relatively mild, the preparation method is simple, and the yield is higher than 90%. The preparation method is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, specifically a method for preparing monodisperse cerium oxide loose nanospheres, specifically a method for preparing cerium oxide powder in a hydrothermal kettle by using glucose as a shape control agent to regulate and control it . Background technique [0002] Rare earth is an important strategic energy source in the world. Rare earth elements can produce a variety of electronic energy levels during electronic transition due to their less than full 4f electron shell structure, so rare earth elements can be used as excellent materials for catalysis, luminescence and electric light sources. Cerium is the most abundant element in the rare earth family. Cerium oxide-based materials have attracted extensive attention from researchers due to their wide applications in catalysis, fuel cells, optical thin films, polishing materials, gas probes, etc. In particular, the oxygen storage performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y30/00
Inventor 牛和林凌双英付莎莎周应武
Owner ANHUI UNIVERSITY