Method for preparing double-layer hollow spherical nickel cobaltate nanoparticles

A nanoparticle and hollow spherical technology is applied in the field of preparation of double-shell hollow spherical nickel cobaltate nanoparticles, which can solve the problems of single product morphology, cumbersome operation, environmental pollution, etc., and achieves high chemical activity, simple operation and low price. low cost effect

Inactive Publication Date: 2019-08-30
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the above synthesis process, the morphology of the obtained product is relatively simple, and these preparation processes have disadvantages such as high cost, cumbersome operation, and environmental pollution.

Method used

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  • Method for preparing double-layer hollow spherical nickel cobaltate nanoparticles
  • Method for preparing double-layer hollow spherical nickel cobaltate nanoparticles
  • Method for preparing double-layer hollow spherical nickel cobaltate nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Stir and mix 1.5 mmol D-xylose powder with 30 ml isopropanol, then add 0.5 mmol Ni(NO 3 ) 2 ·6H 2 O and 1 mmol Co(NO 3 ) 2 ·6H 2 O was added to the above solution, stirred evenly, transferred to a 50 ml reaction kettle, sealed, placed in an oven at 180°C, and the reaction continued for 24 hours. After the reaction was completed, the solution was centrifuged and cleaned twice with water and ethanol, and then dried and collected to obtain a solid spherical carbonaceous microsphere precursor. The scanning photos and transmission photos are shown in the attached figure 1 And attached figure 2 .

Embodiment 2

[0028] The sample prepared in Example 1 was annealed, the sample was put into a crucible and placed in a muffle furnace, and the temperature was raised to 450°C at a heating rate of 5°C / min, and kept for 2h to obtain a solid spherical NiCo 2 o 4 Nanospheres, its scanning photo and transmission photo are shown in the attached image 3 And attached Figure 4 .

Embodiment 3

[0030] As in Example 2, the sample prepared in Example 1 was annealed, but the heating rate was changed to 7°C / min, and other conditions remained unchanged, and a single-shell hollow spherical NiCo2 o 4 Nanospheres, its scanning photo and transmission photo are shown in the attached Figure 5 And attached Figure 6 .

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Abstract

The invention discloses a method for preparing double-layer hollow spherical nickel cobaltate nanoparticles and belongs to the technical field of nano material preparation. The method comprises the following steps: by taking D-xylose as a carbon source, dispersing the D-xylose into an isopropanol solution, further adding cobalt-nitrate hexahydrate and nickel-nitrate hexahydrate, conducting a solvothermal reaction for a certain time so as to obtain amorphous carbon microspheres with cobalt ions and nickel ions, and conducting annealing at a certain velocity, so as to obtain the double-layer hollow spherical nickel cobaltate nanoparticles. In addition, by adjusting annealing velocities, nickel cobaltate nanoparticles of different internal structures can be prepared. Compared with conventional methods such as a template or acid etching method, the method has the advantages of being low in cost, simple to operate and friendly to the environment, and the prepared double-layer hollow spherical nickel cobaltate nanoparticles are of remarkable mesoporous structures, not liable to aggregate, good in crystallization, large in specific surface area, high in surface chemical activity and goodin electrochemical property and gas sensitivity, and have potential application values in fields such as supercapacitors and gas sensitive sensors.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a method for preparing a double-shell hollow spherical nickel cobaltate nanoparticle. The hollow structure exhibits good electrochemical and gas-sensing properties in the fields of supercapacitors and gas-sensing sensors. Background technique [0002] In recent years, hollow particles have aroused great interest. Due to their internal space, low density, large specific surface area, strong stability and surface permeability, they are widely used in catalysis, photoelectric sensors, drug delivery carriers, and photonic crystals. , energy storage devices and nanochemical reactions have important application prospects. Today, the best way to prepare a well-formed hollow structure consists of coating the desired material on a removable template, or transforming it with preformed particles according to different principles (chemical displacement method, Ki...

Claims

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Application Information

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IPC IPC(8): C01G53/00B82Y30/00
CPCB82Y30/00C01G53/00C01P2002/72C01P2004/03C01P2004/04C01P2004/34C01P2004/61
Inventor 曾毅王连强徐昊妍
Owner JILIN UNIV
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