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A hollow nickel molybdate nanoflower assembled from nanosheets and its preparation method

A technology of nickel molybdate and nanoflowers, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of uneven size of nanorods and excessive size of nanospheres, so as to save the consumption of substrates and save Raw material, light weight effect

Active Publication Date: 2019-03-19
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the size of the prepared nanorods is not uniform, and the nanospheres are aggregates of nanorods without a hollow structure, and the size of the nanospheres is too large, reaching 2 μm

Method used

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  • A hollow nickel molybdate nanoflower assembled from nanosheets and its preparation method
  • A hollow nickel molybdate nanoflower assembled from nanosheets and its preparation method
  • A hollow nickel molybdate nanoflower assembled from nanosheets and its preparation method

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preparation example Construction

[0027] In a preferred embodiment of the present invention, also provide the preparation method of above-mentioned hollow nickel molybdate nano flower material, the steps are as follows:

[0028] (1) Add CTAB to a mixed solvent of water and ethanol to obtain a mixed solution a;

[0029] (2) Cyclohexane is added to solution a, and then ammonia water is added to obtain microemulsion b;

[0030] (3) Add Ni(NO 3 ) 2 ·6H 2 O and (NH 4 ) 6 Mo 7 o 24 , to obtain a mixed solution c;

[0031] (4) The mixed solution c prepared in step (3) is subjected to a hydrothermal reaction, the conditions of the hydrothermal reaction: the temperature is 100-125°C, and the time is 12-17h;

[0032](5) The product after step (4) is separated, washed, dried, ground, and calcined to obtain a hollow nickel molybdate nanoflower material assembled from nanosheets.

[0033] In step (2) of the present invention, preferably, after adding ammonia water, stir for 1-2h (more preferably 1.5h): to obtain a...

Embodiment 1

[0041] Put a 100mL beaker on a magnetic stirrer, add a mixed solution of 25mL distilled water and 15mL ethanol and raise the temperature to 35°C, add 0.08g CTAB to the mixed solution, when the solution is mixed and transparent, slowly add 4mL cyclohexane, and stir until well mixed. Then add 0.50mL of ammonia water, stir and react for 1.5h, slowly add 0.5718g Ni(NO 3 ) 2 ·6H 2 O and 0.3388g (NH 4 ) 6 Mo 7 o 24 , Stir the reaction at 35°C for 3h to obtain a light green solution. The obtained light green solution was transferred to a 100mL reactor, and placed in a 100°C thermostat for hydrothermal reaction for 12h. After cooling, the light green solution was suction filtered and washed. The washed precipitate was dried at 40° C. for 18 hours, and the dried precipitate was ground and then calcined at 500° C. for 4 hours to obtain hollow nickel molybdate nanoflowers assembled from nanosheets.

[0042] Observation by transmission electron microscope, such as figure 2 As s...

Embodiment 2

[0044] Put a 100mL beaker on a magnetic stirrer, add a mixed solution of 25mL distilled water and 15mL ethanol and raise the temperature to 35°C, add 0.08g CTAB to the mixed solution, when the solution is mixed and transparent, slowly add 4mL cyclohexane, and stir until well mixed. Then add 0.50mL of ammonia water, stir and react for 1.5h, slowly add 0.5718g Ni(NO 3 ) 2 ·6H 2 O and 0.3388g (NH 4 ) 6 Mo 7 o 24 , Stir the reaction at 35°C for 3h to obtain a light green solution. The obtained light green solution was transferred to a 100mL reactor, and placed in a 100°C thermostat for hydrothermal reaction for 18h. After cooling, the light green solution was suction filtered and washed. The washed precipitate was dried at 40°C for 18h, ground and calcined at 500°C for 4h to obtain solid nickel molybdate nanoflowers assembled from nanosheets, as shown in Figure 4 shown.

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Abstract

The invention discloses a hollow nickel molybdate nanoflower assembled by nanosheets and a preparing method of the hollow nickel molybdate nanoflower assembly. The preparing method comprises the stepsof using Ni(NO3)2.6H2O and (NH4)6Mo7O24 as raw materials, adopting ammonium hydroxide as a solution PH modifier and a catalyst, using microemulsion formed by CTAB, cyclohexane, ethyl alcohol and water as a template, and preparing the hollow nickel molybdate nanoflower material through a hydrothermal reaction and calcination treatment. The hollow nickel molybdate nanoflower assembled by the nanosheets is of an obvious hollow structure, compared with a pure spherical structure, the specific surface area can be increased through the hollow structure, so that the contact area of an electrolyte and the hollow nickel molybdate nanoflower assembled by the nanosheets is increased; electrochemical properties are improved; framework base materials are not needed, the mass is low, and raw materialsare saved.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial synthesis, and in particular relates to a hollow nickel molybdate nanoflower assembled from nanosheets and a preparation method thereof. Background technique [0002] Nickel molybdate, as an important transition metal oxide of molybdenum acid, is widely used in the field of lithium-ion batteries and supercapacitors due to its unique physical and chemical properties, especially in the field of energy storage. Compared with traditional materials, Nanomaterials have excellent electrochemical properties, so the preparation, characterization and related performance research of nickel molybdate nanomaterials have received widespread attention. [0003] In recent years, nano-nickel molybdate materials with different morphologies have been reported successively, such as nanospheres, nanorods, nanosheets, nanowires and nanoarrays, etc., but there are few reports on hollow nickel molybdate nanomaterial...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/00B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C01G53/00C01P2002/72C01P2004/04C01P2004/45C01P2004/50C01P2004/62
Inventor 周国伟郝盈颖黄惠高婷婷石磊
Owner QILU UNIV OF TECH
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