Method for preparing trihydroxy cobalt hydroxide

A technology of cobalt hydroxide and trihydroxyl, which is applied in the direction of cobalt oxide/cobalt hydroxide, etc., which can solve the problems of low structural controllability, limited research on cobalt hydroxide materials, optimization and improvement of application performance, and limited types of cobalt hydroxide and other problems, to achieve the effect of simple preparation method, good crystallization and low cost

Inactive Publication Date: 2011-09-21
TONGJI UNIV
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  • Abstract
  • Description
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Problems solved by technology

Some synthetic methods such as liquid phase precipitation "Synthesis of the CoOOH fine nanoflake film with the high rate capacitance property" [Hosono E, Fujihara S, Honma I, Ichihara M and Zhou H S J. Power Sources, 158, 779-783 (2006)], Precursor conversion "Microwave-assisted synthesis of β-C(OH) 2 and Co3O4nanosheets via a layered precursor conversion method” [Liang Z, Zhu Y, Cheng G and Huang Y.Can.J.Chem.84, 1050-1053(2006)] and the electrochemical deposition method “Directlow-temperature deposition of crystallized CoOOH films by potentiostatic electrolysis”[Pauporte T, Mend

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  • Method for preparing trihydroxy cobalt hydroxide
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Examples

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Example Embodiment

[0018] Example 1

[0019] In a 100mL polytetrafluoroethylene reactor, weigh 0.03g cobalt chloride and 0.012g cetyltrimethylammonium chloride (CTAC) into 5mL N,N-dimethylamide and 5mL water In the mixed solution, stir gently until the cobalt chloride is completely dissolved, forming a red uniform solution. Then add 0.05mL of hydrogen peroxide with a content of 30wt% under stirring, and mix well. The molar concentration of cobalt chloride in the solution is 2.5mM, and the molar concentration of cetyltrimethylammonium chloride is 4.0mM. The molar concentration of hydrogen peroxide is 0.04M. Tighten the reaction kettle and put it in an oven at 150°C for 15 hours. After centrifugal separation, washing with water 3 times and drying, a dark red powdery product is obtained. The product is a dandelion-like nanobelt assembly, a single belt has a length of about 1.5 μm and a width of about 20 nm. XRD patterns such as figure 1 As shown, it shows good crystallization.

Example Embodiment

[0020] Example 2

[0021] In a 100mL polytetrafluoroethylene reactor, weigh 0.03g cobalt chloride and 0.012g cetyltrimethylammonium chloride (CTAC) into 5mL N,N-dimethylamide and 5mL water In the mixed solution, stir gently until the cobalt chloride is completely dissolved, forming a red uniform solution. Then add 1.0mL (30%) of hydrogen peroxide under stirring, mix well, the molar concentration of cobalt chloride in the solution is 2.5mM, and the molar concentration of cetyltrimethylammonium chloride is 4.0mM. The molar concentration of hydrogen oxide is 0.8M. Tighten the reaction kettle and put it in an oven at 150°C for 15 hours. After centrifugal separation, washing with water twice and drying, a dark red powdery product is obtained. The product is a monodisperse needle-shaped nanobelt, a single belt has a length of about 10 μm and a width of about 2 μm. The corresponding XRD pattern in Example 2 is similar to that in Example 1.

Example Embodiment

[0022] Example 3

[0023] In a 100mL polytetrafluoroethylene reactor, weigh 0.03g cobalt chloride and 0.012g cetyltrimethylammonium chloride (CTAC) into 5mL N,N-dimethylamide and 5mL water In the mixed solution, stir gently until the cobalt chloride is completely dissolved, forming a red uniform solution. Then add 2.0 mL (30%) of hydrogen peroxide under stirring and mix well. The molar concentration of cobalt chloride in the solution is 2.5 mM, and the molar concentration of cetyl trimethyl ammonium chloride is 4.0 mM. The molar concentration of hydrogen oxide is 1.6M. Tighten the reaction kettle and put it in an oven at 150°C for 15 hours. After centrifugal separation, washing with water 4 times and drying, a dark red powdery product is obtained. The product is a monodisperse needle-shaped nanobelt, the length of a single belt is about 50μm, and the width is about 3μm. The hysteresis curve shows that the nanobelt is a superparamagnet when it is higher than 40K. The correspondi...

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Abstract

The invention relates to a method for preparing trihydroxy cobalt hydroxide, which comprises the following steps of: adding an appropriate amount of cobalt chloride and hexadecyl trimethyl ammonium chloride into mixed liquor of N,N-dimethylformamide and deionized water, and slightly stirring to form red uniform solution; adding 30 weight percent of hydrogen peroxide, fully mixing, screwing a reaction kettle, putting into a drying box, and standing at the temperature of 150 DEG C; and performing centrifugal separation on a product, and washing for multiple times to obtain the product. Comparedwith the prior art, the method has the advantages that: a new type of trihydroxy cobalt hydroxide is synthesized by a hydrothermal method, is well crystallized, and has controllable size and structure, high purity and definite components; the preparation method is simple and practicable, and high in operability and repeatability; and the powdered product has stable performance, can be stored in air at room temperature for a long time, and can be widely used for the fields of energy batteries, catalysis, electrochemistry, gas sensors, magnetics and the like.

Description

technical field [0001] The invention relates to a method for preparing inorganic materials, in particular to a method for preparing cobalt trihydroxide hydroxide. Background technique [0002] Cobalt hydroxide is a functional material with a wide range of uses. It is often used as an additive for Ni / MH battery cathode materials to improve the capacitance and conductivity of β-NiOOH batteries" Synthesis of CoOOH nanorods and application as coating materials of nickel hydroxide for high temperature [0003] The preparation of cobalt hydroxide is a research hotspot at present. Some synthetic methods such as liquid phase precipitation "Synthesis of the CoOOH fine nanoflake film with the high rate capacitance property" [Hosono E, Fujihara S, Honma I, Ichihara M and Zhou H S J. Power Sources, 158, 779-783 (2006)], Precursor conversion "Microwave-assisted synthesis of β-C(OH) 2 and Co3O4nanosheets via a layered precursor conversion method” [Liang Z, Zhu Y, Cheng G and Huang Y.Can...

Claims

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Application Information

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IPC IPC(8): C01G51/04
Inventor 杨金虎秦瑶张兵波包志豪彭成信赵鹏郭方方
Owner TONGJI UNIV
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