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Method for preparing CeO2 nanometer solid sphere by using CTAB (Cetyltrimethyl Ammonium Bromide) as soft template

A technology of solid spheres and soft templates, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problem of high energy consumption, and achieve the effect of cheap raw materials, low cost, and simple process operation

Inactive Publication Date: 2013-05-15
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the calcination process after the hydrothermal method is relatively energy-intensive

Method used

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  • Method for preparing CeO2 nanometer solid sphere by using CTAB (Cetyltrimethyl Ammonium Bromide) as soft template
  • Method for preparing CeO2 nanometer solid sphere by using CTAB (Cetyltrimethyl Ammonium Bromide) as soft template

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Experimental program
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Effect test

Embodiment 1

[0014] Step 1: Analytical pure Ce(NO 3 ) 3 ·6H 2 O was dissolved in deionized water to obtain Ce(NO 3 ) 3 solution;

[0015] KBrO 3 , CTAB (cetyltrimethylammonium bromide) and Ce(NO 3 ) 3 ·6H 2 O mixed KBrO with a molar ratio of 3:2:1 3 , CTAB joined Ce(NO 3 ) 3 The solution was continuously stirred at 60°C for 2 hours to obtain a mixed solution;

[0016] Step 2: Move the mixed solution into the reaction kettle, place it in an oven at 180°C for 15 hours, centrifuge and wash after the reaction, and dry at 80°C to obtain solid spherical CeO 2 Nano powder.

[0017] The resulting solid spherical CeO 2 The nano-powder is measured with a D / Max-2200pc type X-ray diffractometer produced by Japan Rigaku Company, and the results are as follows: figure 1 As shown, the pure phase CeO with better crystallinity was obtained 2 Nano solid spheres, the JCPDS card number of the found product is 33-0394, which belongs to the cubic crystal system. The microscopic morphology of the...

Embodiment 2

[0019] Step 1: Analytical pure Ce(NO 3 ) 3 ·6H 2 O was dissolved in deionized water to obtain Ce(NO 3 ) 3 solution; the KBrO 3 , CTAB (cetyltrimethylammonium bromide) and Ce(NO 3 ) 3 ·6H 2 O mixed KBrO with a molar ratio of 4:1.5:1 3 , CTAB joined Ce(NO 3 ) 3 The solution was continuously stirred at 60°C for 2 hours to obtain a mixed solution;

[0020] Step 2: Move the mixed solution into the reaction kettle, place it in an oven at 160°C for 20 hours, centrifuge and wash after reaction, and dry at 80°C to obtain solid spherical CeO 2 Nano powder.

Embodiment 3

[0022] Step 1: Analytical pure Ce(NO 3 ) 3 ·6H 2 O was dissolved in deionized water to obtain Ce(NO 3 ) 3 solution; the KBrO 3 , CTAB (cetyltrimethylammonium bromide) and Ce(NO 3 ) 3 ·6H 2 O mixed KBrO with a molar ratio of 6:0.5:1 3 , CTAB joined Ce(NO 3 ) 3 The solution was continuously stirred at 60°C for 2 hours to obtain a mixed solution;

[0023] Step 2: Move the mixed solution into the reaction kettle, place it in an oven at 190°C for 10 hours, centrifuge and wash after the reaction, and dry at 80°C to obtain solid spherical CeO 2 Nano powder.

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Abstract

The invention discloses a method for preparing a CeO2 nanometer solid sphere by using CTAB (Cetyltrimethyl Ammonium Bromide) as a soft template. The method comprises the following steps of: dissolving Ce(NO3)3.6H2O in deionized water to obtain a Ce(NO3)3 solution; adding KBrO3 and the CTAB (Cetyltrimethyl Ammonium Bromide) into the Ce(NO3)3 solution and obtaining a mixed solution after continuous uniform stirring; and transferring the mixed solution into a reaction kettle, placing the reaction kettle in a baking oven to carry out reaction at 160-190 DEG C for 10-20hours, carrying out centrifugal washing after the reaction is finished, and drying the washed product at 80 DEG C to obtain solid sphere-like CeO2 nanometer powder. According to the preparation method disclosed by the invention, the Ce(NO3)3.6H2O, the KBrO3 and the CTAB (Cetyltrimethyl Ammonium Bromide) are used as raw materials, the nanometer solid sphere is further synthesized by taking the CATB as the soft template and by means of hydro-thermal method, mean diameter of the sphere is 1mu m, and the nanometer solid sphere is composed of a large number of fine CeO2 particles. The method has the unique advantages of relative low cost of raw materials and simple technological operation.

Description

technical field [0001] The present invention relates to a kind of preparation CeO 2 The method of nano-solid spheres, especially related to a kind of preparation of CeO with CTAB as soft template 2 Nanosphere method. Background technique [0002] CeO 2 It is the most active and widely used oxide among rare earth elements. It has a fluorite structure and is widely used in catalytic conversion of automobile exhaust, water gas conversion reaction, wet catalytic oxidation reaction, polishing materials, oxygen storage materials, and ultraviolet absorbers. , photocatalysts, antioxidants in biological tissues, and solid fuel cells. In the field of catalysis, CeO 2 It is often used as a carrier to combine with metals to form a catalyst with excellent performance. It not only plays a role in dispersing, shaping and stabilizing the supported metals, but also its oxygen storage capacity can also provide active oxygen during the catalytic reaction. It has the effect of combined cat...

Claims

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Application Information

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IPC IPC(8): C01F17/00B82Y30/00
Inventor 王芬周长江丁阳
Owner SHAANXI UNIV OF SCI & TECH
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