Gamma-MnO2 preparation method

A technology of manganese sulfate solution and potassium permanganate, which is applied in the direction of manganese oxide/manganese hydroxide, etc., can solve the problems of high cost, complicated preparation process, and environmental pollution, and achieve good crystallinity, simple operation of the preparation process, and high purity Effect

Inactive Publication Date: 2015-08-19
LIAONING UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter which method is used, there are problems such as complex preparation process, high cost, and environmental pollution. Therefore, the simple, efficient, and low-cost γ-MnO 2 The preparation method has important practical significance

Method used

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  • Gamma-MnO2 preparation method

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Experimental program
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Effect test

Embodiment 1

[0026] A, preparing mass fraction respectively is that the potassium permanganate solution of 3.06% and the manganese sulfate solution that mass fraction is 4.33%;

[0027] b. Heat the potassium permanganate solution and the manganese sulfate solution described in step a to 95°C respectively, and keep the temperature for 12min;

[0028] C, the manganese sulfate solution and the potassium permanganate solution after being incubated in the step b are respectively subjected to electric pulse treatment, the frequency is 4HZ, the voltage is 500V, and the treatment time is 90s;

[0029] d. Mix the manganese sulfate solution and potassium permanganate solution after the electric pulse treatment according to the volume ratio of 1:1 to obtain a mixed solution, then put the mixed solution in a G4 funnel, and pump it after standing for 24 hours filter;

[0030] e. Wash the solid obtained by filtering in step d with deionized water for 3 times, then place the cleaned solid in a beaker, p...

Embodiment 2

[0032] A, preparing mass fraction respectively is that the potassium permanganate solution of 3.06% and the manganese sulfate solution that mass fraction is 4.33%;

[0033] b. Heat the potassium permanganate solution and the manganese sulfate solution described in step a to 90°C respectively, and keep the temperature for 15min;

[0034] C, the manganese sulfate solution and the potassium permanganate solution after being incubated in the step b are respectively subjected to electric pulse treatment, the frequency is 3HZ, the voltage is 600V, and the treatment time is 60s;

[0035] d. Mix the manganese sulfate solution and potassium permanganate solution after the electric pulse treatment according to the volume ratio of 1:0.95 to obtain a mixed solution, then put the mixed solution in a G4 funnel, and pump it after standing for 24 hours filter;

[0036] e. Wash the solid obtained by filtering in step d with deionized water for 3 times, then place the cleaned solid in a beaker...

Embodiment 3

[0038] A, preparing mass fraction respectively is that the potassium permanganate solution of 3.06% and the manganese sulfate solution that mass fraction is 4.33%;

[0039] b. Heat the potassium permanganate solution and the manganese sulfate solution described in step a to 100°C respectively, and keep the temperature for 10min;

[0040] C, the manganese sulfate solution and the potassium permanganate solution after being incubated in the step b are respectively subjected to electric pulse treatment, the frequency is 5HZ, the voltage is 400V, and the treatment time is 120s;

[0041] d. Mix the manganese sulfate solution and potassium permanganate solution after the electric pulse treatment according to the volume ratio of 1:1.05 to obtain a mixed solution, then put the mixed solution in a G4 funnel, and pump it after standing for 24 hours filter;

[0042] e. Wash the solid obtained by filtering in step d with deionized water for 3 times, then place the cleaned solid in a beak...

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Abstract

The present invention discloses a gamma-MnO2 preparation method, which comprises: a, respectively preparing a potassium permanganate solution with a mass fraction of 3.06% and a manganese sulfate solution with a mass fraction of 4.33%; b, heating the potassium permanganate solution and the manganese sulfate solution to a temperature of 90-100 DEG C, and maintaining the temperature for 10-15 min; c, respectively carrying out an electrical pulse treatment on the obtained potassium permanganate solution and the obtained manganese sulfate solution; d, mixing the treated potassium permanganate solution and the treated manganese sulfate solution according to a volume ratio of 1:0.95-1.05 to prepare a mixed solution, and filtering; and e, washing the solid obtained through filtering in the step d 3 times with deionized water, and drying the washed solid so as to obtain the gamma-MnO2. The preparation method of the present invention has the following beneficial effects that: the operation is simple, the obtained gamma-MnO2 powder has characteristics of high purity and good crystallinity, and the electrical pulse treatment is adopted so as to provide the low cost compared with the use of the high temperature heating and acid addition treatment.

Description

technical field [0001] The present invention relates to a kind of MnO 2 The preparation method of powder, more specifically, the present invention relates to a kind of gamma-MnO 2 Powder preparation method. Background technique [0002] MnO 2 Because it is used in electronics, catalysis, molecular sieves, ceramics, especially as Li / MnO 2 Electrode materials for batteries and other fields have good application prospects, and have become one of the research hotspots in recent years. MnO 2 α-MnO 2 , β-MnO 2 , γ-MnO 2 , δ-MnO 2 , Amorphous MnO 2 and other variants, which show large differences in performance. Such as various MnO 2 Both can be used as electrode materials for batteries, but studies have found that γ-MnO 2 It has the best performance and is the best electrode material used in the battery industry; different forms of MnO 2 There are also significant differences in the catalytic activity of γ-MnO in neutral solution. 2 It has high electrocatalytic activ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02
Inventor 王冰梅海林唐立丹齐锦刚彭淑静王建中刘亮
Owner LIAONING UNIVERSITY OF TECHNOLOGY
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