Unlock instant, AI-driven research and patent intelligence for your innovation.
A controlled synthesis method of nano manganese dioxide with different shapes and sizes
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A nano-manganese dioxide and synthesis method technology, applied in the direction of manganese oxide/manganese hydroxide, nanotechnology, etc., can solve the problems of long reaction time, easy decomposition of materials, cumbersome preparation process, etc., achieve cheap and safe materials, and reduce production The effect of simple cost and preparation conditions
Active Publication Date: 2019-07-30
GUANGDONG MEDICAL UNIV
View PDF5 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0004] Nano-MnO prepared by the method reported so far 2 Large particle size (above 500nm), which limits the size of nano-MnO 2 In terms of batteries, especially in the application of lithium-ion batteries; some methods have expensive raw materials or toxic compounds, and do not use the actual operation of industrial production; some methods have strong acid solutions, which are highly corrosive and require high reaction equipment. , it is difficult to order equipment, and it is not easy to carry out production; some methods have a long reaction time and low production efficiency, and because they are in a state of high temperature and high pressure for a long time, the material is easy to decompose and the product shape is easy to change, so that the reaction yield is low and the product The quality is poor, and it is difficult to carry out industrial production; some methods are more complicated, and it is difficult to popularize and apply
All in all, since the preparation of nano-manganese dioxide has to overcome several difficulties such as cumbersome preparation process, uneasy control of product morphology and poor product performance, so far, there has not been found a combination of simple process, easy-to-control morphology and excellent product performance at home and abroad. Preparation method for industrialized production of nano manganese dioxide
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0046] Example 1 A manganese dioxide nano flower
[0047] 1. Preparation method
[0048] A nano-manganese dioxide prepared by the following steps:
[0049] (1) Put 7.9071g KMnO 4 Make a constant volume in 200mL deionized water, stir to prepare KMnO with a concentration of 0.25mol / L 4 Solution; add 3.5mL of H 3 PO 4 Solution (mass fraction of 85%, density of 1.69g / mL), mix the two evenly, and finally prepare a reaction solution with a volume of 65mL; among them, KMnO 4 With H 3 PO 4 The molar ratio of is 1:1;
[0050] (2) Transfer 65 mL of the reaction solution to a 100 mL polytetrafluoroethylene reactor and react at 160°C for 90 minutes;
[0051] (3) Cool down naturally, open the reactor, remove the supernatant, add deionized water to wash 2 to 3 times, and then wash with anhydrousethanol solution 2 to 3 times, then dry in a blast drying oven at 60°C until there is no supernatant Then transfer to 80℃ and vacuum dry for 8h to obtain monodisperse MnO 2 Nano flower powder.
[0052] 2. P...
Embodiment 2
[0054] Example 2 A manganese dioxide nano flower
[0055] 1. Preparation method
[0056] Other conditions are the same as in Example 1, the difference is:
[0057] Control KMnO 4 With H 3 PO 4 The molar ratio of is 1:0.5; the reaction solution is reacted at 160℃ for 60min.
[0058] 2. Product characterization
[0059] In this example, a flower-like structure of nano-manganese dioxide was prepared. The scanning electron microscope (SEM) topography and transmission electronmicroscope (TEM) topography of the manganese dioxide nanoflowers are shown respectively figure 2 with Figure 5 .
Embodiment 3
[0060] Example 3 A manganese dioxide nano flower
[0061] 1. Preparation method
[0062] Other conditions are the same as in Example 1, the difference is:
[0063] Control KMnO 4 With H 3 PO 4 The molar ratio of is 1:1.5; the reaction solution is reacted at 160℃ for 30min.
[0064] 2. Product characterization
[0065] In this example, a flower-like structure of nano-manganese dioxide was prepared. The scanning electron microscope (SEM) topography and transmission electronmicroscope (TEM) topography of the manganese dioxide nanoflowers are shown respectively image 3 with Image 6 .
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Property
Measurement
Unit
diameter
aaaaa
aaaaa
diameter
aaaaa
aaaaa
diameter
aaaaa
aaaaa
Login to View More
Abstract
The invention discloses a controlled synthesizing method for nano-manganeseoxide with different shapes and sizes. By taking phosphoric acid as a shape and size regulator, the phosphoric acid is reacted with a permanganateaqueous solution to synthesize nano-manganeseoxide, wherein the molar ratio of permanganate and phosphoric acid is 1: (0.5-16). The method is of relatively high controllability, and can control shapes of nano-manganeseoxide directionally to obtain flower-like and rod-like nano-manganese oxide with uniform shapes, separately. Meanwhile, the raw materials are cheaper and safer, and are unlikely to corrode equipment; the diameter of the synthesized nano-manganese oxide flower is smaller than 400nm, and the minimum diameter reaches 50nm; the diameter of the synthesized nano-manganese oxide rod is 18.9-28.8nm, and the length is 283-425nm; and the prepared product is higher in specific surface area and higher in adsorption capacity. The synthesizing method has the advantages of being simple in process, cheap and easy for scaled production and the like.
Description
Technical field [0001] The invention belongs to the technical field of inorganic chemicals. More specifically, it relates to a controlled synthesis method of nano-manganese dioxide with different morphologies and sizes. Background technique [0002] Manganese dioxide (MnO 2 ) As an important functional inorganic material, it has abundant sources, low price and environmental friendliness, which has aroused great interest of researchers. Due to its unique physical and chemical properties, it has been widely used in catalysts, adsorption and electrochemical supercapacitors. As a battery material, manganese dioxide has poorer performance than noble metal oxides. Because of its better Faraday effect, manganese dioxide has received widespread attention as an electrode material for ion batteries and supercapacitors. [0003] At present, the main methods for synthesizing manganese dioxide nanoparticles are redox method and thermal decomposition method. Patent CN200810200287 reported tha...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More