CN1673097A - Prepn process of amorphous manganese dioxide - Google Patents
Prepn process of amorphous manganese dioxide Download PDFInfo
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- CN1673097A CN1673097A CN 200510033466 CN200510033466A CN1673097A CN 1673097 A CN1673097 A CN 1673097A CN 200510033466 CN200510033466 CN 200510033466 CN 200510033466 A CN200510033466 A CN 200510033466A CN 1673097 A CN1673097 A CN 1673097A
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- manganese dioxide
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- amorphous manganese
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Abstract
The present invention relates to the preparation process of amorphous manganese dioxide. Organic manganese carboxylate is dissolved in organic solvent to form homogeneous solution and oxidant is added to form mixture system, and the mixture system is thermostatically or azeotropically refluxed, filtered and washed to obtain amorphous manganese dioxide. The reaction system consists of organic manganese carboxylate in 2-5 weight portions, organic solvent in 40-80 weight portions and oxidant in 1-3 weight portions.
Description
Technical field
The present invention relates to field of inorganic material preparing technology, be specifically related to a kind of amorphous manganese dioxide (MnO
2) the preparation method.
Technical background
Manganse Dioxide is used to make magneticsubstance in electronic industry; in chemical industry, be used to make glass, pottery and dyestuff or be used as oxygenant; be widely used as cathode material at battery industry, in other industry (as: catalyzer, molecular sieve, fine chemistry industry, environment protection etc.) also have a wide range of applications.Therefore, the research of relevant chemical manganese bioxide preparation and character thereof has caused the great interest of people, and many investigators have synthesized the Manganse Dioxide of various different crystal forms with chemical method, for example the Manganse Dioxide of α, β, γ and δ crystal formation.
The method of chemosynthesis Manganse Dioxide generally includes: thermal decomposition method, liquid phase oxidation, reduction method, Mn (OH)
2Oxidation style, and electrolysis manganese sulfate solution method etc.
Can make the crystal formation perfection, meet the β-MnO of stoichiometric number by the thermolysis manganous nitrate
2, this method is that the nitrate with Mn (II) places in the airtight furnace device, controlled temperature is about 180 ℃, heating 48h.Use the atmospheric oxidation manganous carbonate, also can synthesize Manganse Dioxide, common oxidizing temperature is 260-280 ℃, the human thermolysis process is also arranged with MnCO
3Be decomposed into MnO, under the condition of pH=4～5, the NaClO with 10% is oxidized to MnO with MnO again
2
Liquid phase oxidation can make the Manganse Dioxide of different crystal forms with the aqueous solution of oxygenant oxidation manganese salt such as Potcrate, sodium bromate, ammoniumper chlorate and ammonium persulphate.If any human 225g ammonium persulphate oxidation MnSO
4The method of the aqueous solution obtains γ-MnO
2
Reduction method, the MnSO that is boiling
4Permanganate-reducing can obtain γ-MnO in the aqueous solution
2, use MnCl
2Reduction NaMnO
4Can make active MnO
2Use H
2O
2Reduction KMnO
4The aqueous solution can make γ-MnO
2, 6mol/LHCl is joined 0.1mol/L ebullient KMnO
4In the aqueous solution, can obtain tan α-MnO
2
The manganous hydroxide oxidation style blasts air or oxygen in the mixed solution of manganous hydroxide and sodium hydroxide, can obtain a kind of intermediate product of the unknown, and this intermediate product can be converted into δ-MnO through deep oxidation
2By handle Mn (OH) with diluted acid
2The atmospheric oxidation product make γ-MnO
2
Electrolysis manganese sulfate solution method is controlled at temperature in the 90-97 ℃ of scope, can obtain γ-MnO of well-crystallized with the manganese sulfate solution of direct current electrolysis sulfuric acid acidation
2
But above method or under hot conditions, or under aqueous conditions the Manganse Dioxide of synthetic certain crystal formation because amorphous manganese dioxide has the unique advantage of self, as in field of power supplies, unformed MnO
2With other manganese and oxygen compounds (as spinel LiMn
2O
4) compare, have: (1) does not have the restriction of theoretical specific capacity, and specific storage is bigger.(2) in charge and discharge process, the embedding of lithium and deviate from the amorphous structure that can not destroy Manganse Dioxide, advantage such as amorphous Manganse Dioxide stability is relatively good.In recent years, the synthetic concern that causes many investigators of amorphous manganese dioxide, and synthesized many different amorphous manganese dioxides by different methods.But mostly they are to make with different reductive agents (as: FUMARIC ACID TECH GRADE, oxalic acid, manganese benzoate, salt compounded of iodine etc.) reduction potassium permanganate solution.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of amorphous manganese dioxide easy and simple to handle.
The preparation method of amorphous manganese dioxide of the present invention is as follows: organic carboxyl acid manganese salt is dissolved in forms uniform solution in the organic solvent, add oxygenant, gained mixed system azeotropic refluxes, then after filtration, washing obtains amorphous manganese dioxide; Described organic carboxyl acid manganese salt is meant by containing-COO
-Organic acid ion and Mn
2+The salt that ion forms.The parts by weight consumption of said components is as follows:
Organic carboxyl acid manganese salt 2-5
Organic solvent 40-80
Oxygenant 1-3.
Described organic solvent is alcohols or ketone.
Described alcohols is one or more mixtures in ethanol, methyl alcohol, the ethylene glycol.
Described ketone is acetone and/or butanone.
Described oxygenant is potassium permanganate, sodium permanganate, Potassium Persulphate or ammonium persulphate.
The present invention compared with prior art has following advantage:
(1) owing to be reflected at the phase oxidative agent and liquid-phase reduction agent interface is carried out, and stir and constantly upset the local reaction system, make the unformed MnO for preparing
2Uniform particles, little, the high dispersing of particle diameter;
(2) this unformed MnO of the present invention's preparation
2Preparation technology simple, only need simple heating, under air atmosphere, normal pressure, just can carry out; Low to the experimental installation requirement, only need common heating device and reflux, be convenient to produce in enormous quantities;
(3) the unformed MnO of the present invention's preparation
2Have broad application prospects in fields such as lithium ion battery, catalysis and fine chemistry industries.
(4) the present invention proposes a kind of synthetic method of new amorphous manganese dioxide, i.e. synthetic amorphous manganese dioxide in non-aqueous system.
Description of drawings
Fig. 1 is the X-ray diffracting spectrum of amorphous manganese dioxide;
The transmission electron microscope collection of illustrative plates of Fig. 2 amorphous manganese dioxide.
Embodiment
Embodiment 1
(1) preparation of manganese salicylate
Take by weighing the 5.75g manganous carbonate and the 13.80g Whitfield's ointment places the 500ml beaker, in beaker, add the 50ml deionized water, magnetic stirring apparatus stirs, not having the bubble back of emerging to system continue to stir 2 hours, beaker is moved in the vacuum drying oven, 110 ℃ of freeze-day with constant temperature 72 hours, make solid-state manganese salicylate.
(2) preparation of amorphous manganese dioxide
Take by weighing manganese salicylate 4.9989g, join in the three-necked flask that 100ml dehydrated alcohol and 50ml ethylene glycol are housed, after 65 ℃ of waters bath with thermostatic control are stirred to dissolving, the potassium permanganate powder that adds the 2.7840g porphyrize, system is heated to boiling, reflux to stir after 30 hours, after filtration, washing makes unformed MnO
2As shown in Figure 1, 2, prepared MnO
2Present good undefined structure, no X-ray characteristic diffraction peak; Particle is small, the about 100nm of diameter, and yardstick is even, is high dispersing.
Embodiment 2
(1) preparation of manganese salicylate: with embodiment 1
(2) unformed MnO
2Preparation
Take by weighing manganese salicylate 3.2876g, join in the three-necked flask that the 150ml dehydrated alcohol is housed, after 65 ℃ of waters bath with thermostatic control are stirred to dissolving, the ammonium persulphate powder that adds the 2.5046g porphyrize, system is heated to boiling, reflux stirs after 24 hours, after filtration, washing, drying make unformed MnO
2Prepared MnO
2Present good undefined structure, no X-ray characteristic diffraction peak; Particle is small, the about 100nm of diameter, and yardstick is even, is high dispersing.
Embodiment 3
(1) preparation of manganese salicylate: with embodiment 1
(2) unformed MnO
2Preparation
Take by weighing manganese salicylate 5.0519g, join in the three-necked flask that the 200ml butanone is housed, after 60 ℃ of waters bath with thermostatic control are stirred to dissolving, the sodium permanganate powder that adds the 1.6843g porphyrize, system is heated to boiling, reflux stirs after 48 hours, after filtration, washing, drying make unformed MnO
2Prepared MnO
2Present good undefined structure, no X-ray characteristic diffraction peak; Particle is small, the about 100nm of diameter, and yardstick is even, is high dispersing.
Claims (5)
1, a kind of preparation method of amorphous manganese dioxide, it is characterized in that organic carboxyl acid manganese salt is dissolved in and form uniform solution in the organic solvent, add oxygenant, gained mixed system azeotropic refluxes and stirs after 24--48 hour, then after filtration, washing obtains amorphous manganese dioxide; Described organic carboxyl acid manganese salt is meant by containing-COO
-Organic acid ion and Mn
2+The salt that ion forms; The parts by weight consumption of said components is as follows:
Organic carboxyl acid manganese salt 2-5
Organic solvent 40-80
Oxygenant 1-3.
2, the preparation method of amorphous manganese dioxide according to claim 1 is characterized in that described organic solvent is alcohols or ketone.
3, the preparation method of amorphous manganese dioxide according to claim 2 is characterized in that described alcohols is one or more mixtures in ethanol, methyl alcohol, the ethylene glycol.
4, the preparation method of amorphous manganese dioxide according to claim 2 is characterized in that described ketone is acetone and/or butanone.
5, the preparation method of amorphous manganese dioxide according to claim 1 is characterized in that described oxygenant is potassium permanganate, sodium permanganate, Potassium Persulphate or ammonium persulphate.
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| CNB2005100334662A CN1295154C (en) | 2005-03-11 | 2005-03-11 | Prepn process of amorphous manganese dioxide |
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|---|---|---|---|
| CNB2005100334662A CN1295154C (en) | 2005-03-11 | 2005-03-11 | Prepn process of amorphous manganese dioxide |
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| CN1295154C CN1295154C (en) | 2007-01-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101327959B (en) * | 2008-08-01 | 2011-04-20 | 中国科学院电工研究所 | Preparation of epsilon-MnO2 laminate structure nanosphere |
| CN103373744A (en) * | 2012-04-25 | 2013-10-30 | 兰州理工大学 | Preparation method of manganese dioxide nanorod |
| CN108772057A (en) * | 2018-06-28 | 2018-11-09 | 广东工业大学 | A kind of low-temperature SCR manganese oxide catalyst and its preparation method and application |
| CN110104689A (en) * | 2019-03-27 | 2019-08-09 | 河南省人民医院 | A kind of hollow manganese dioxide nano particle and preparation method thereof |
| CN112607781A (en) * | 2020-12-16 | 2021-04-06 | 嘉应学院 | alpha-MnO of non-porous channel ion2Preparation method of (1) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6465129B1 (en) * | 1998-05-01 | 2002-10-15 | Regents Of The University Of Minnesota | Lithium batteries with new manganese oxide materials as lithium intercalation hosts |
| JP2000138059A (en) * | 1998-08-25 | 2000-05-16 | Sony Corp | Positive electrode material, its manufacture, and nonaqueous secondary battery using it |
| CN1142103C (en) * | 2002-01-18 | 2004-03-17 | 清华大学 | Process for synthesizing different crystal form one-dimensional single crystal mangnesium dioxide nano wire |
| CN1147432C (en) * | 2002-03-29 | 2004-04-28 | 武汉大学 | Prepn of active manganese dioxide |
-
2005
- 2005-03-11 CN CNB2005100334662A patent/CN1295154C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101327959B (en) * | 2008-08-01 | 2011-04-20 | 中国科学院电工研究所 | Preparation of epsilon-MnO2 laminate structure nanosphere |
| CN103373744A (en) * | 2012-04-25 | 2013-10-30 | 兰州理工大学 | Preparation method of manganese dioxide nanorod |
| CN108772057A (en) * | 2018-06-28 | 2018-11-09 | 广东工业大学 | A kind of low-temperature SCR manganese oxide catalyst and its preparation method and application |
| CN108772057B (en) * | 2018-06-28 | 2020-12-08 | 广东工业大学 | Low-temperature SCR manganese oxide catalyst and preparation method and application thereof |
| CN110104689A (en) * | 2019-03-27 | 2019-08-09 | 河南省人民医院 | A kind of hollow manganese dioxide nano particle and preparation method thereof |
| CN110104689B (en) * | 2019-03-27 | 2021-08-13 | 河南省人民医院 | Hollow manganese dioxide nano-particles and preparation method thereof |
| CN112607781A (en) * | 2020-12-16 | 2021-04-06 | 嘉应学院 | alpha-MnO of non-porous channel ion2Preparation method of (1) |
| CN112607781B (en) * | 2020-12-16 | 2022-12-23 | 嘉应学院 | alpha-MnO of non-porous channel ion 2 Preparation method of (1) |
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| CN1295154C (en) | 2007-01-17 |
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