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CeO2 nano thread and its preparation method

A technology of nanowires and solutions, applied in chemical instruments and methods, artificial filaments of inorganic raw materials, rare earth metal compounds, etc.

Inactive Publication Date: 2005-06-29
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • CeO2 nano thread and its preparation method
  • CeO2 nano thread and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Example 1. CeO 2 Preparation of spherical nanoparticles

[0015] Prepare CeO by the inventor's method 2 Spherical nanoparticles:

[0016] In a 100 mL round bottom flask Ce(SO 4 ) 2and anhydrous sodium acetate are added to distilled water to finally form a solution containing 0.02mol / L Ce(SO 4 ) 2 , 100 mL of a solution of 20.0 g / L sodium acetate. The solution was transparent light yellow, and the pH was around 6.0. The solution was placed in ultrasonic radiation at room temperature and pressure for sonochemical reaction for 30 min. The sonochemical reaction is to use an ultrasonic probe (Xinzhi Company, 1.2cm diameter, Ti head, 20KHz, power 100W / cm 2 ) is directly inserted into the reactant liquid. During the reaction process, because no cooling device is added, the temperature of the reactant will rise to a certain extent and reach about 343K when the reaction ends. After the reaction, a large amount of light yellow precipitates were formed. After cooling to...

Embodiment 2

[0017] Example 2. CeO 2 Preparation of Nanofilaments

[0018] Weigh about 0.02g of the CeO prepared above 2 Spherical nanoparticle powder was added to 50 mL of 10M NaOH solution, and the solution was placed in ultrasonic radiation for 120 min at room temperature and normal pressure for sonochemical reaction. The sonochemical reaction is to use an ultrasonic probe (Xinzhi Company, 1.2cm diameter, Ti head, 20KHz, power 100W / cm 2 ) is directly inserted into the reactant liquid. During the reaction process, because no cooling device is added, the temperature of the reactant will rise to a certain extent and reach about 343K when the reaction ends. After the reaction, a large amount of milky white flocculent precipitates were produced. After cooling to room temperature, centrifuge (10000 rounds / min, 5 min), wash the precipitate with distilled water, ethanol and acetone in sequence, and then place the obtained precipitate at room temperature and air dry naturally. The final pro...

Embodiment 3

[0019] Example 3. CeO 2 Preparation of Nanofilaments

[0020] Prepare CeO by the step of embodiment 2 2 Nanofilaments, but the reaction time was extended to 240min, yielded the same results.

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Abstract

a CeO 2 Nanowire, which is CeO with a diameter of 4-5nm and a length of 100-200nm 2 nanowires. CeO 2 Nanofilaments are CeO with cubic fluorite structure 2 nanowires. According to XRD determination, the result shows that it is CeO with pure cubic fluorite structure. 2 . The positions and intensities of the peaks matched literature values. No heterogeneous peaks were found, indicating that the purity of the product is relatively high. By TEM photo, it is observed that the CeO of the present invention 2 The diameter of the nanowire is 3-5nm, and the length is 100-200nm. The invention discloses its preparation method.

Description

1. Technical field [0001] The present invention relates to cerium oxide nanowires. 2. Background technology [0002] Transition metal oxides are an important class of semiconductor materials, which are widely used in magnetic storage media, solar energy conversion, electronic devices and catalysis. In recent years, transition metal oxide nanoparticles have attracted extensive attention from the scientific community due to their large surface-to-volume ratio, high activity, exceptional electrical properties, and unique optical properties. CeO 2 It is an important rare earth transition metal oxide material, which has a series of special properties and is widely used in many fields. CeO 2 It has good high temperature resistance and maintains a stable fluorite structure in the temperature range from room temperature to its melting point. Moreover, it is attracting more and more attention because of its good structural compatibility with silicon and its strong ultraviolet abs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/00D01F9/08
Inventor 朱俊杰王辉陈洪渊
Owner NANJING UNIV