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Preparation method of cerium oxide nano particles

A nanoparticle and cerium oxide technology, which is applied in the field of preparation of cerium oxide nanoparticles, can solve problems such as poor dispersion, uneven appearance, and uneven particle size, and achieve simple preparation process, uniform appearance, and low preparation cost. low effect

Inactive Publication Date: 2018-10-26
上海上惠纳米科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the disadvantages of non-uniform particle size, non-uniform shape and poor dispersion in the existing nano-material preparation method, and proposes a preparation method for preparing nano-particles by using a hydrothermal method, and the prepared nano-particles have crystallization Good stability, uniform shape, good dispersion, easy control of particle size, simple preparation process, etc.

Method used

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  • Preparation method of cerium oxide nano particles

Examples

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Effect test

Embodiment 1

[0022] A method for preparing cerium oxide nanoparticles provided in an embodiment of the present invention comprises the following steps (each component is calculated in parts by weight):

[0023] a. Dissolve 8 to 9 parts of cerium nitrate hexahydrate in 35 to 45 parts of deionized water to obtain a solution of cerium nitrate hexahydrate; dissolve 3 to 3.5 parts of sodium hydroxide in 35 to 45 parts of deionized water, Prepare dilute alkali solution;

[0024] b. Quickly add the above-mentioned cerium nitrate hexahydrate solution into the dilute alkali solution, and stir vigorously at room temperature for 30 minutes; then transfer the solution to a 100ml stainless steel reaction kettle with polytetrafluoroethylene lining, and place it in an oven at 150-180°C Carry out hydrothermal reaction for 18-24 hours;

[0025] c. After the temperature of the reaction kettle drops to room temperature, centrifuge, wash with water and absolute ethanol several times, disperse with an ultraso...

Embodiment 2

[0035] A method for preparing cerium oxide nanoparticles provided in the embodiments of the present invention is basically the same as in Example 1, except that:

[0036] Described step a is specifically:

[0037] Dissolve 8.5 to 8.8 parts of cerium nitrate hexahydrate in 38 to 42 parts of deionized water to obtain a solution of cerium nitrate hexahydrate; dissolve 3.2 to 3.4 parts of sodium hydroxide in 38 to 42 parts of deionized water to obtain Dilute alkaline solution.

Embodiment 3

[0039] A method for preparing cerium oxide nanoparticles provided in the embodiments of the present invention is basically the same as in Examples 1 and 2, except that:

[0040] Described step a is specifically:

[0041] Dissolve 8.48 parts of cerium nitrate hexahydrate in 40 parts of deionized water to obtain a solution of cerium nitrate hexahydrate; dissolve 3.2 parts of sodium hydroxide in 40 parts of deionized water to obtain a dilute alkali solution.

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Abstract

The invention discloses a preparation method of cerium oxide nano particles. The preparation method is characterized by comprising the following steps: a, separately preparing a cerium nitrate hexahydrate solution and a dilute alkali solution; b, rapidly adding the cerium nitrate hexahydrate solution into the dilute alkali solution, and violently stirring at the room temperature; and then transferring the solution into a stainless steel reaction kettle, and performing the hydrothermal reaction for 18 to 24 hours in a baking oven at 150 to 180 DEG C; c, cooling to the room temperature, centrifuging, washing for multiple times, dispersing for one hour by using an ultrasonic breaking machine, and drying for 12 hours; and d, calcining for 3 to 4 hours, and obtaining the cerium oxide nano particles. The preparation method has the advantages of good crystallization performance, homogenous morphology, good dispersity, easy in controlling the particle size, simple preparation process and the like, and can effectively solve the problems of complicated nano material preparation process, severe environmental pollution, waste and the like.

Description

technical field [0001] The invention relates to a method for preparing cerium oxide nanoparticles, which belongs to the technical field of nano oxide preparation technology. Background technique [0002] The performance of nanomaterials is closely related to the size of nanomaterials. Often small-sized nanomaterials have better physical and chemical properties. Therefore, the preparation of small-sized nanomaterials has become a research hotspot in the field of nanometers in recent years. Among them, cerium oxide nanoparticles are widely used in the fields of automobile exhaust control, catalyst carrier, coating material and electrode material because of their large specific surface area and high oxygen mobility. [0003] Cerium nitrate hexahydrate, also known as cerium (III) nitrate hexahydrate, is a chemical substance with a molecular weight of 434.22. It supports combustion and is irritating. The industrial product is reddish and deliquescent. The substance may be harmfu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y30/00
CPCB82Y30/00C01F17/206C01P2004/03C01P2004/62
Inventor 张登松施利毅陆美荣颜婷婷
Owner 上海上惠纳米科技有限公司