Preparation method of manganese dioxide nanowire

A technology of manganese dioxide nanometer and potassium permanganate, applied in manganese oxide/manganese hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of chemical performance limitation, small specific surface area, large particle size, etc., and achieve simple process , high purity, small size effect

Inactive Publication Date: 2016-04-20
SHANGHAI INST OF TECH
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Problems solved by technology

Ordinary manganese dioxide has large particle size, irregular shape, small specific surface area, low activity, and greatly limited chemical properties. However, the development of nano-scale manganese dioxide can overcome the shortcomings of ordinary manganese dioxide.

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  • Preparation method of manganese dioxide nanowire

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[0018] The present invention provides a kind of preparation method of manganese dioxide nanowire, it is characterized in that, comprises the following steps:

[0019] 1) Potassium permanganate is dissolved in water, and then an inorganic alkali solution is added to form a mixed aqueous solution, which is left to age for a period of time to produce a sol-gel;

[0020] 2) stirring and dispersing the sol-gel obtained in step 1), and adding the inorganic acid dropwise, so that the inorganic acid and the sol-gel are fully mixed;

[0021] 3) placing the mixture obtained in step 2) in a hydrothermal reaction kettle for hydrothermal reaction at a certain temperature for a period of time;

[0022] 4) Washing and drying the precipitate formed by the reaction in step 3) to obtain the manganese dioxide nanowire product.

[0023] Wherein, the molar ratio of potassium permanganate to the hydroxide ion of the inorganic base and the hydrogen ion of the inorganic acid is 1:2-10:2-10; the inor...

Embodiment 1

[0026] Dissolve 0.016mol potassium permanganate in 80mL of water, then add 2.17mL of 28% ammonia water to form a mixed aqueous solution, leave it to age for 6 hours, and produce sol-gel; stir and disperse the obtained sol-gel, and add dropwise 0.87mL of 98% concentrated Sulfuric acid, let the sulfuric acid and sol-gel be fully mixed; put the acidic sol-gel mixture in a hydrothermal reaction kettle for 14 hours at 120°C for hydrothermal reaction; wash and dry the precipitate generated by the hydrothermal reaction to obtain manganese dioxide nanowires product.

Embodiment 2

[0028] Dissolve 0.016mol potassium permanganate in 80mL of water, then add 4.34mL of 28% ammonia water to form a mixed aqueous solution, leave it to age for 3 hours, and produce sol-gel; stir and disperse the obtained sol-gel, and add 1.74mL of concentrated sulfuric acid dropwise (98%), let the sulfuric acid and sol-gel fully mix; put the acidic sol-gel mixture in a hydrothermal reaction kettle for 6h at 140°C for hydrothermal reaction; wash and dry the precipitate generated by the hydrothermal reaction to obtain carbon dioxide Manganese nanowire products.

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Abstract

The invention relates to the technical field of nanomaterial preparation, in particular to a preparation method of a manganese dioxide nanowire. The preparation method includes the following steps that potassium permanganate is dissolved in water, an inorganic alkali solution is added, a mixed aqueous solution is formed, the mixed aqueous solution is placed and aged for a period of time, and sol-gel is generated; the sol-gel is stirred and dispersed, inorganic acid is dripped, and the inorganic acid and the sol-gel are fully mixed; the mixture is placed in a hydrothermal reaction kettle and subjected to a hydrothermal reaction for a period of time at a certain temperature; precipitate generated in the reaction is washed and dried, and the manganese dioxide nanowire is obtained. Compared with the prior art, the preparation method has the advantages that the process is simple, operation is easy, few kinds of reagents are needed, reaction conditions are mild, cost is low, and environmental friendliness and cleanliness are achieved, and can be applied to industrialized mass production; the obtained manganese dioxide nanowire is small in size, uniform in microtopography and high in purity and can be applied to the fields of supercapacitors, sensors, environmental pollution remediation and the like.

Description

[technical field] [0001] The invention relates to the technical field of preparation of nanometer materials, in particular to a preparation method of manganese dioxide nanowires. [Background technique] [0002] Manganese dioxide is a transition metal oxide with excellent physical and chemical properties, and has been widely used in the field of batteries. Ordinary manganese dioxide has large particle size, irregular shape, small specific surface area, low activity, and greatly limited chemical properties. However, the development of nano-scale manganese dioxide can overcome the shortcomings of ordinary manganese dioxide. Due to its special nano-material characteristics, nano-manganese dioxide has continuously expanded its application fields. For example, nano-manganese dioxide has good electrochemical properties, making it a research hotspot in the field of supercapacitors; nano-manganese dioxide has excellent redox properties, making it widely used in the fields of catalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02B82Y30/00
CPCC01G45/02C01P2004/04C01P2004/16
Inventor 潘栋宇侯梅芳刘超男周建杜三艳
Owner SHANGHAI INST OF TECH
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