Method for preparing tetragonal phase zirconia nanorod

A phase zirconia and nanorod technology, applied in the field of preparing tetragonal zirconia nanorods, can solve the problems of high preparation cost and low efficiency, and achieve the effects of short reaction time, good repeatability and low reaction temperature

Inactive Publication Date: 2011-07-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the products obtained by the above method for preparing zirconia nanorods are monoclinic phases, and require high-temperature calcination, resulting in high preparation costs and low efficiency.

Method used

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  • Method for preparing tetragonal phase zirconia nanorod
  • Method for preparing tetragonal phase zirconia nanorod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step 1: Select high-purity water-soluble ZrOCl 2 ·8H 2 O is dissolved in deionized water and configured into a solution, and the concentration of zirconium ions in the solution is 0.2mol / L;

[0020] Step 2: Add the NaOH mineralizer with a concentration of 0.1mol / L to the solution obtained in Step 1, and place it on a constant temperature magnetic stirrer at 50°C for 20 minutes, wherein the volume ratio of the zirconium salt solution to the mineralizer is 1:3;

[0021] Step 3: Add the precursor solution obtained in step 2 into a microwave digestion tank, and then move the microwave digestion tank into a microwave hydrothermal synthesizer for a synthesis reaction. The microwave hydrothermal synthesis reaction time is 40 minutes, and the microwave hydrothermal synthesis reaction temperature is 180°C. The reaction pressure of microwave hydrothermal synthesis is 1MPa, and it is naturally cooled to room temperature after the reaction;

[0022] Step 4: The product obtained ...

Embodiment 2

[0025] Step 1: Select high-purity water-soluble ZrOCl 2 ·8H 2 O is dissolved in deionized water and configured into a solution, and the concentration of zirconium ions in the solution is 0.4mol / L;

[0026] Step 2: Add the NaOH mineralizer with a concentration of 0.2mol / L to the solution obtained in step 1, and place it on a constant temperature magnetic stirrer at 50°C for 40 minutes, wherein the volume ratio of the zirconium salt solution to the mineralizer is 1:5;

[0027] Step 3: Add the precursor solution obtained in step 2 into a microwave digestion tank, and then move the microwave digestion tank into a microwave hydrothermal synthesizer for synthesis reaction. The microwave hydrothermal synthesis reaction time is 45 minutes, and the microwave hydrothermal synthesis reaction temperature is 190°C. The reaction pressure of microwave hydrothermal synthesis is 2MPa, and it is naturally cooled to room temperature after the reaction;

[0028] Step 4: The product obtained in...

Embodiment 3

[0031] Step 1: Select high-purity water-soluble ZrCl 4 Dissolved in deionized water, configured into a solution, the concentration of zirconium ions in the solution is 0.6mol / L;

[0032] Step 2: Add NaOH mineralizer with a concentration of 0.3mol / L to the solution obtained in step 1, and place it on a constant temperature magnetic stirrer at 50°C for 60 minutes, wherein the volume ratio of the zirconium salt solution to the mineralizer is is 1:7;

[0033] Step 3: Add the precursor solution obtained in step 2 into a microwave digestion tank, and then move the microwave digestion tank into a microwave hydrothermal synthesizer for synthesis reaction. The microwave hydrothermal synthesis reaction time is 50 minutes, and the microwave hydrothermal synthesis reaction temperature is 200°C. The reaction pressure of microwave hydrothermal synthesis is 3MPa, and it is naturally cooled to room temperature after the reaction;

[0034] Step 4: The product obtained in step 3 was collected...

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Abstract

The invention provides a method for preparing a tetragonal phase zirconia nanorod. The method comprises the following steps of: adding a mineralizing agent into aqueous solution containing zirconium ions to obtain hydroxide suspension; and performing microwave hydrothermal reaction, washing and drying to obtain the tetragonal phase zirconia nanorod. The diameter and the length of the tetragonal phase zirconia nanorod can be controlled by controlling the temperature, the pressure and the time of the microwave hydrothermal reaction. The tetragonal phase zirconia nanorod prepared by the method has high crystallinity and higher purity; the diameter of a single nanorod is about 60 to 180nm; and the length of the nanorod is 0.5 to 4 mu m. The method for preparing the tetragonal phase zirconia nanorod has the advantages of high purity of a tetragonal phase product, short reaction time, low reaction temperature, high repeatability and the like and is easy to operate.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and relates to a method for preparing tetragonal zirconia nanorods. Background technique [0002] Zirconia has excellent physical and chemical properties such as high temperature resistance, wear resistance and corrosion resistance, and is widely used in the fields of electronic ceramics, functional ceramics and structural ceramics. At different temperatures, zirconia mainly exists in three isomorphs, such as monoclinic zirconia (m-ZrO 2 ), tetragonal zirconia (t-ZrO 2 ) and cubic zirconia (c-ZrO 2 ). Among them, tetragonal or cubic zirconia has broad application prospects in catalytic materials, oxygen sensors, and high-temperature fuel cells. [0003] Nanoscale tetragonal zirconia, such as nanoparticles and nanorods, has new physical properties and has potential applications in many fields. The preparation methods of nanoscale zirconia proposed at home and abroad include so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/02B82Y40/00
Inventor 李翠艳黄剑锋肖明曹丽云卢靖吴建鹏
Owner SHAANXI UNIV OF SCI & TECH
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