By NANOTRUN | 13 July 2021 | 0 Comments
How to prepare manganese dioxide
With the development of science and technology, the preparation technology of manganese dioxide has been continuously improved. At present, the preparation methods of manganese dioxide mainly include a roasting method, sol-gel method, redox method, electrodeposition method, and hydrothermal method.
Roasting method
The roasting method is a method for preparing manganese dioxide by pyrolyzing manganese salt at high temperature. The preparation of manganese dioxide by this method is simple and efficient. There are few factors that affect the performance of the prepared manganese dioxide. The commonly used method can be pyrolyzed into two The manganese salts of manganese oxide include manganese carbonate, manganese acetate, manganese nitrate, and potassium permanganate.
The roasting method is a relatively mature method for preparing manganese dioxide, which can be prepared on a large scale, but it has fewer manganese salts and a single raw material. At the same time, due to the high-temperature sintering process, the sintering phenomenon is easy to occur, it is difficult to prepare nanometer manganese dioxide, and the particle size distribution is wide.
Sol-gel method
The sol-gel method is a method for preparing manganese dioxide with mild conditions and simple operation, and the prepared manganese dioxide has a concentrated particle size distribution, a single crystal form, and high crystallinity, and it is easy to prepare nanometer manganese dioxide. The method for preparing manganese dioxide usually involves first adding chemical reagents to the manganese salt solution, changing the hydrolysis state of the solution to form a sol, and then drying and roasting to obtain manganese dioxide. In the process of forming the sol, the particle size and structure of the prepared manganese dioxide can be controlled by introducing surfactants and templates, thereby obtaining manganese dioxide with target properties. This method realizes the controllable preparation of manganese dioxide.
Redox method
Both the roasting method and the sol-gel method need heat treatment at high temperatures to synthesize manganese dioxide, while the redox method is a method of directly preparing manganese dioxide by oxidizing or reducing manganese ions in a solution, without the need for post-high temperature treatment. The reaction conditions are mild, the preparation process is simple, and the reaction time is short. The most common redox method is to prepare manganese dioxide through the reaction of potassium permanganate and divalent manganese salt.
The oxidation-reduction method to prepare manganese dioxide is relatively simple, but the manganese dioxide prepared by it has poor crystallinity and a poor degree of single crystal form.
Electrodeposition
Electrodeposition is a method for preparing manganese dioxide through electrolytic manganese salt solution, including direct current method, pulse current method, and cyclic voltammetry. The preparation of manganese dioxide by electrodeposition is to deposit manganese dioxide on the working electrode, which is usually used to prepare manganese dioxide composite electrodes.
Hydrothermal
The hydrothermal method is a new method for synthesizing manganese dioxide under high temperature and high-pressure conditions. Under the conditions of high temperature and high pressure, the solubility of the ions participating in the reaction is increased, and the activity of the ions participating in the reaction is improved. The reaction that is not easy to occur under normal temperature and pressure can be realized, and the raw materials and reaction paths for preparing manganese dioxide are broadened. Under high temperature and high-pressure conditions, the precipitate is re-dissolved, re-crystallized, and re-growth, and it is easy to prepare nano-scale manganese dioxide with a narrow particle size distribution, high purity, high crystallinity, and single crystal form. In addition, the method for preparing manganese dioxide is easy to dope with other ions, which is beneficial to improve the performance of manganese dioxide materials.
Because manganese dioxide has a wide range of sources, simple and diverse preparation methods, diverse crystal structure, excellent performance, no pollution to the environment, and low cost, manganese dioxide has received extensive attention and applications. At present, manganese dioxide is mainly used in the fields of catalysis and electrodes.
Manganese Dioxide Supplier
TRUNNANO (aka. Luoyang Tongrun Nano Technology Co. Ltd.) is a trusted global chemical material supplier & manufacturer with over 12 years' experience in providing super high-quality chemicals and Nanomaterials. Currently, our company has successfully developed a series of materials. The manganese dioxide produced by our company has high purity, fine particle size and impurity content. Send us an email or click on the needed products to send an inquiry.
Roasting method
The roasting method is a method for preparing manganese dioxide by pyrolyzing manganese salt at high temperature. The preparation of manganese dioxide by this method is simple and efficient. There are few factors that affect the performance of the prepared manganese dioxide. The commonly used method can be pyrolyzed into two The manganese salts of manganese oxide include manganese carbonate, manganese acetate, manganese nitrate, and potassium permanganate.
The roasting method is a relatively mature method for preparing manganese dioxide, which can be prepared on a large scale, but it has fewer manganese salts and a single raw material. At the same time, due to the high-temperature sintering process, the sintering phenomenon is easy to occur, it is difficult to prepare nanometer manganese dioxide, and the particle size distribution is wide.
Sol-gel method
The sol-gel method is a method for preparing manganese dioxide with mild conditions and simple operation, and the prepared manganese dioxide has a concentrated particle size distribution, a single crystal form, and high crystallinity, and it is easy to prepare nanometer manganese dioxide. The method for preparing manganese dioxide usually involves first adding chemical reagents to the manganese salt solution, changing the hydrolysis state of the solution to form a sol, and then drying and roasting to obtain manganese dioxide. In the process of forming the sol, the particle size and structure of the prepared manganese dioxide can be controlled by introducing surfactants and templates, thereby obtaining manganese dioxide with target properties. This method realizes the controllable preparation of manganese dioxide.
Redox method
Both the roasting method and the sol-gel method need heat treatment at high temperatures to synthesize manganese dioxide, while the redox method is a method of directly preparing manganese dioxide by oxidizing or reducing manganese ions in a solution, without the need for post-high temperature treatment. The reaction conditions are mild, the preparation process is simple, and the reaction time is short. The most common redox method is to prepare manganese dioxide through the reaction of potassium permanganate and divalent manganese salt.
The oxidation-reduction method to prepare manganese dioxide is relatively simple, but the manganese dioxide prepared by it has poor crystallinity and a poor degree of single crystal form.
Electrodeposition
Electrodeposition is a method for preparing manganese dioxide through electrolytic manganese salt solution, including direct current method, pulse current method, and cyclic voltammetry. The preparation of manganese dioxide by electrodeposition is to deposit manganese dioxide on the working electrode, which is usually used to prepare manganese dioxide composite electrodes.
Hydrothermal
The hydrothermal method is a new method for synthesizing manganese dioxide under high temperature and high-pressure conditions. Under the conditions of high temperature and high pressure, the solubility of the ions participating in the reaction is increased, and the activity of the ions participating in the reaction is improved. The reaction that is not easy to occur under normal temperature and pressure can be realized, and the raw materials and reaction paths for preparing manganese dioxide are broadened. Under high temperature and high-pressure conditions, the precipitate is re-dissolved, re-crystallized, and re-growth, and it is easy to prepare nano-scale manganese dioxide with a narrow particle size distribution, high purity, high crystallinity, and single crystal form. In addition, the method for preparing manganese dioxide is easy to dope with other ions, which is beneficial to improve the performance of manganese dioxide materials.
Because manganese dioxide has a wide range of sources, simple and diverse preparation methods, diverse crystal structure, excellent performance, no pollution to the environment, and low cost, manganese dioxide has received extensive attention and applications. At present, manganese dioxide is mainly used in the fields of catalysis and electrodes.
Manganese Dioxide Supplier
TRUNNANO (aka. Luoyang Tongrun Nano Technology Co. Ltd.) is a trusted global chemical material supplier & manufacturer with over 12 years' experience in providing super high-quality chemicals and Nanomaterials. Currently, our company has successfully developed a series of materials. The manganese dioxide produced by our company has high purity, fine particle size and impurity content. Send us an email or click on the needed products to send an inquiry.
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