Synthesis method of cobaltosic oxide nano-tube

A technology of cobalt tetroxide and synthesis method, applied in the direction of cobalt oxide/cobalt hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of complex reaction process, poor appearance, low yield, etc., and achieve easy control of production conditions and product purity High, simple process effect

Inactive Publication Date: 2009-05-13
SHANDONG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the Co prepared by the colloidal template method 3 o 4 Nanotubes have poor morphology and low yield, which limits their large-scale production and application [X.Y.Shi, S.B.Han, R.J.Sanedrin, et al.Synthesis of Cobalt Oxide Nanotubes from Cobalt Oxide Nanotubes from Colloidal Particles Modified with aCo (III)-Cysteinato Precursor Chem.Mater.2002,14,1897-1902]; Co 3 o 4 Nanotubes make the whole reaction process more complicated, increase the preparation cost, and are not conducive to large-scale production [W.Yang, L.N.Xu, J.Chen.Co 3 o 4 Nanomaterials in Lithium-Ion Batteries and Gas Sensors Adv. Funct. Mater. 2005, 15, 851-857]

Method used

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  • Synthesis method of cobaltosic oxide nano-tube
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  • Synthesis method of cobaltosic oxide nano-tube

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Weigh 0.00025mol of cobaltous nitrate and place it in a beaker, add 10ml of deionized water to dissolve it, then add 10ml of 0.1M ammonia solution dropwise under rapid stirring, continue to stir for 10 minutes after the precipitation is formed, and then dissolve the obtained The precipitate was centrifuged and washed until the pH of the washing liquid was 8, and the precipitate was redispersed in 20ml of methanol water solution with a weight concentration of 100%, and then according to the precipitate: sodium nitrate = 1: 3 parts by weight, sodium nitrate was added as a mineralizer and stirred to make It is dissolved, and the stirred and dissolved mixture is moved into a closed stainless steel reactor, and reacted at 250°C for 5 hours. After the reaction is completed, it is cooled to room temperature, and then the obtained product is washed with deionized water and dried at 50°C to obtain product. The product was identified as cobalt tetroxide by X-ray powder diffractio...

Embodiment 2

[0021] Weigh 0.00025mol of cobaltous nitrate and place it in a beaker, add 10ml of deionized water to dissolve it, then add 10ml of 0.2M ammonia solution dropwise under rapid stirring, continue stirring for 5 minutes after the precipitation is formed, and then dissolve the obtained The precipitate was centrifuged and washed until the pH of the washing liquid was 6, and the precipitate was redispersed in 25ml of methanol water with a weight concentration of 3%, and then according to the precipitate: sodium nitrate = 1: 0.2 parts by weight, sodium nitrate was added as a mineralizer and stirred to make It is dissolved, and the stirred and dissolved mixture is moved into a closed stainless steel reactor, and reacted at 100°C for 30 hours. After the reaction is completed, it is cooled to room temperature, and then the obtained product is washed with deionized water and dried at 80°C to obtain product. The product was identified as cobalt tetroxide by X-ray powder diffraction; the m...

Embodiment 3

[0023] Weigh 0.00025mol of cobaltous nitrate and place it in a beaker, add 10ml of deionized water to dissolve it, then add 10ml of 0.2M ammonia solution dropwise under rapid stirring, continue to stir for 8 minutes after the precipitation is formed, and then dissolve the obtained The precipitate was centrifuged and washed until the pH of the washing liquid was 7, and the precipitate was redispersed in 30ml of methanol water solution with a weight concentration of 20%, and then according to the precipitate: sodium nitrate = 1: 2 parts by weight, sodium nitrate was added as a mineralizer and stirred to make It is dissolved, and the stirred and dissolved mixture is moved into a closed stainless steel reactor, and reacted at 180°C for 20 hours. After the reaction is complete, it is cooled to room temperature, and then the obtained product is washed with deionized water and dried in a conventional vacuum to obtain product. The product was identified as cobalt tetroxide by X-ray po...

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Abstract

The present invention provides a synthesis method of cobaltosic oxide nano tube. Said method includes the following steps: (a), in a soluble salt solution in which the cobaltous ions are dissolved, under the condition of stirring slowly-adding ammonia water solution until the precipitate is formed; (b), centrifugally washing the formed precipitate until the pH value of said washing liquor is neutral; (c), making the washed precipitate be again dispersed in the solvent, adding inorganic salt as mineralization agent according to be weight portion ratio of washed precipitate; inorganic salt=1:0-3, stirring them to make them be completely dissolved; and (d), placing the above-mentioned materials into a closed reactor, making reaction for 5-30 h at 100-250 deg.C, cooling to room temperature, washing and drying so as to obtain the invented cobaltosic oxide nano tube.

Description

Technical field: [0001] The invention belongs to the technical field of inorganic chemical industry, and relates to a production method of nanomaterials, in particular to a synthesis method of tricobalt tetroxide nanotubes. Background technique: [0002] In recent years, one-dimensional nanomaterials have attracted extensive attention because of their unique physical and chemical properties. Among them, nanotubes, as a special form of these materials, have good applications in many fields, such as catalysis, sensing, and nanoelectronic devices. Therefore, the preparation of nanotubes of various materials with good properties has become a research hotspot at present. [0003] Cobalt trioxide nanotubes, as an important functional P-type semiconductor nanomaterial, are widely used in heterogeneous catalysis, sensors, electrochromatographic devices, solar energy absorption, and preparation of pigments, especially in the current production of lithium-ion battery materials cobalt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/04B82B3/00
Inventor 唐波禚林海曹丽华葛介超杨菲
Owner SHANDONG NORMAL UNIV
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