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Preparation method of nanometer cadmium oxide with special shape

A technology of cadmium oxide and cadmium hydroxide, which is applied in the field of nanomaterials, can solve problems such as affecting chemical properties, morphology damage, product structure collapse, etc., and achieve the effects of low reaction temperature, smooth surface and stable powder properties

Active Publication Date: 2017-06-16
QUFU NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the preparation of hexagonal CdO nanodisks disclosed in the prior art, some need to add mineralizers; some require long-term high-temperature calcination; some prepared hexagonal Cd(OH) 2 The thickness of the nanodisk is relatively thin, and when it is converted into a hexagonal CdO nanodisk by calcination, the structure of the product will collapse and the morphology will be damaged, which will affect its chemical properties.

Method used

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  • Preparation method of nanometer cadmium oxide with special shape
  • Preparation method of nanometer cadmium oxide with special shape
  • Preparation method of nanometer cadmium oxide with special shape

Examples

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Embodiment 1

[0041] Embodiment 1, a kind of preparation method of the special appearance nanometer cadmium oxide of high catalytic performance, comprises steps as follows:

[0042] (1) Weigh 0.7712g (2.5mmol) of cadmium nitrate tetrahydrate and dissolve it in 50mL of absolute ethanol to form a cadmium nitrate ethanol solution. Weigh 0.2623g (6.25mmol) of lithium hydroxide and dissolve it in 20mL of double-distilled water to form a lithium hydroxide solution.

[0043] Under the condition of stirring, the lithium hydroxide solution was added dropwise to the cadmium nitrate ethanol solution, and after the dropwise addition was completed, the stirring was continued for 60 min.

[0044] (2) Put the mixed solution obtained in step (1) in a reaction kettle, and react at 200° C. for 12 hours. The obtained product was washed with twice-distilled water and absolute ethanol in turn, and dried at 85°C for 30 hours to obtain a cadmium hydroxide precursor; its microscopic morphology was characterized b...

Embodiment 2

[0054] Example 2. Prepare hexagonal cadmium oxide nanodiscs as described in Example 1. The sequence of steps remains the same, and the weight of cadmium nitrate tetrahydrate remains unchanged, which is still 0.7712g cadmium nitrate tetrahydrate (2.5mmol). The difference is that,

[0055] In step (1), the lithium hydroxide weighed is 0.2413g (5.75mmol). The molar ratio of cadmium nitrate to lithium hydroxide = 1:2.3; after the lithium hydroxide solution was added dropwise to the cadmium nitrate ethanol solution, the stirring time was continued for 50 minutes.

[0056] In step (2), the product drying condition is 80° C. for 36 hours.

[0057] In step (3), the calcination condition of the cadmium hydroxide precursor is: calcination at 180° C. for 1 hour, and then calcination at 320° C. for 2 hours.

[0058] The prepared hexagonal cadmium oxide nanodisks. The side length of the small cube is 230-260nm, the side length of the nano-disk is 500-750nm, and the thickness is 230-250n...

Embodiment 3

[0060] Embodiment 3, prepare hexagonal cadmium oxide nano-disk as described in embodiment 1, step sequence is unchanged, the quality of the cadmium nitrate tetrahydrate that weighs is constant, difference is:

[0061] In step (1), the lithium hydroxide weighed is 0.2832g (6.75mmol); the molar ratio of cadmium nitrate to lithium hydroxide=1:2.7. Lithium hydroxide solution was added dropwise to the cadmium nitrate ethanol solution, and the stirring was continued for 70 min.

[0062] In step (2), the product drying condition is 90° C. for 24 hours.

[0063] In step (3), the calcination condition of the cadmium hydroxide precursor is: calcination at 220° C. for 70 minutes, and then 100 minutes at 320° C. The prepared hexagonal cadmium oxide nanodisks. The side length of the small cube is 240-260nm, the side length of the nano-disk is 800-900nm, and the thickness is 250-270nm. The morphology of the hexagonal cadmium oxide nanodisks is complete.

[0064] Carry out catalytic prop...

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Abstract

The invention relates to a preparation method of nanometer cadmium oxide with a special shape. The method comprises the following steps: adding a lithium hydroxide solution into a cadmium nitrate ethanol solution by dropping, ensuring that obtained mixed liquor is reacted for 10 to 12 h at 180 to 200 DEG C, and washing and drying the obtained product, so as to obtain a cadmium hydroxide precursor; and calcinating the obtained cadmium hydroxide precursor in a segmented way, so as to obtain nanometer cadmium oxide powder, wherein the nanometer cadmium oxide adopts a hexagon cadmium oxide nanodisk with a porous structure. The obtained nanometer cadmium oxide powder is high in purity and high in catalytic performance, and is applied to a catalyst for thermolysis of ammonium perchlorate. The preparation method is simple, low in cost and suitable for industrial application.

Description

technical field [0001] The invention relates to a preparation method of nano-cadmium oxide with special appearance and high catalytic performance, belonging to the technical field of nano-materials. Background technique [0002] Cadmium oxide (CdO) is a typical n-type semiconductor material. The difference in band gap originates from the vacancies of cadmium and oxygen, and is closely related to the preparation process. Cadmium oxide is widely used in the field of optoelectronics, such as solar cells, phototransistors, photodiodes, transparent electrodes, gas sensors, etc. At the same time, cadmium oxide can also be used as a thermal decomposition catalyst for ammonium perchlorate. Ammonium perchlorate (AP), the molecular formula is NH 4 ClO 4 , colorless or white orthorhombic or needle-like crystals. It is hygroscopic and decomposes when heated. It can explode when subjected to severe heat or violent impact. It is a strong oxidant and is often used as a rocket propellan...

Claims

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Application Information

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IPC IPC(8): C01G11/00B82Y40/00B01J23/26B01J35/10B01J35/02
CPCC01G11/00B01J23/26C01P2002/72C01P2004/24C01P2004/03C01P2002/88B01J35/50B01J35/60
Inventor 景志红郭道军颜廷江
Owner QUFU NORMAL UNIV
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