Manganese dioxide mesoporous material and method of preparing the same

A manganese dioxide mesoporous and manganese dioxide technology, applied in the field of materials, can solve the problems of application limitations and less performance research

Inactive Publication Date: 2009-01-14
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There have been many reports on cast intercalation structure materials, for example: the Chinese patent with the patent number 200510134718.0 and the invention name "amino acid intercalation manganese dioxide", but there are few studies on its performance and its application is limited

Method used

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  • Manganese dioxide mesoporous material and method of preparing the same
  • Manganese dioxide mesoporous material and method of preparing the same
  • Manganese dioxide mesoporous material and method of preparing the same

Examples

Experimental program
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Effect test

Embodiment 1

[0042] 1. Preparation of Na-type layered manganese dioxide

[0043] 200mL concentration of 0.6mol / L NaOH and concentration of 1.2mol / L H 2 o 2 The mixed solution was quickly added to 100mL with a concentration of 0.4mol / LMn(NO 3 ) 2 solution, namely Mn 2+ with OH - The molar ratio is 1:3, Mn 2+ with H 2 o 2 The molar ratio is 1:6, vigorously stirred and reacted for 30 minutes, filtered, and the filter cake was transferred to a 100mL polytetrafluoroethylene cup, and 40mL of NaOH solution with a concentration of 2mol / L was added, that is, MnO 2 with OH - The molar ratio was 1:2, and it was stirred to form a paste. The polytetrafluoroethylene cup was sealed in a hydrothermal kettle, and hydrothermally treated at 160°C for 15 hours. After the hydrothermal kettle is naturally cooled to room temperature, the kettle is opened for suction filtration, and the filter cake is washed with deionized water until the pH value of the filtrate is 7-8. The resulting precipitate was dr...

Embodiment 2

[0062] In step 4 of the assembly reaction process of manganese dioxide nano-layer and divalent manganese ion, take the stripped manganese dioxide nano-layer suspension and add it to deionized water to form a manganese dioxide nano-layer with a concentration of 0.02mol / L Sol solution 200mL, take 40mL concentration and be 0.1mol / L manganese nitrate aqueous solution, the Mn in manganese nitrate 2+ The molar ratio of peeling off the manganese dioxide nano-layer is 1: 1, the manganese dioxide nano-layer sol solution and the manganese nitrate solution are mixed, the resulting mixed suspension is stirred and reacted at room temperature for 4 hours, filtered, and washed with deionized water for 3-3 hours. 4 times, remove the divalent manganese ions adsorbed on the precipitation surface, and dry at room temperature for 24 hours to obtain layered manganese oxide intercalated with divalent manganese ions.

[0063] In the oxidation process step 5 of the layered manganese oxide intercalate...

Embodiment 3

[0068] In step 4 of the assembly reaction process step 4 of the manganese dioxide nano-layer and divalent manganese ions, the stripped manganese dioxide nano-layer suspension is added to deionized water to form a concentration of 0.02mol / L Manganese nanolayer sol solution 2000mL, get 20mL concentration and be 0.1mol / L manganese nitrate aqueous solution, the Mn in manganese nitrate 2+ The molar ratio of peeling off the manganese dioxide nano-layer is 1: 20, the manganese dioxide nano-layer sol solution and the manganese nitrate solution are mixed, the resulting mixed suspension is stirred and reacted at room temperature for 24 hours, filtered, and washed with deionized water for 3 ~ 4 times, remove the divalent manganese ions adsorbed on the precipitation surface, and dry at room temperature for 12 hours to obtain layered manganese oxide intercalated with divalent manganese ions.

[0069] In step 5 of the oxidation process of the layered manganese oxide intercalated by divalent...

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Abstract

Disclosed is a manganese dioxide mesoporous material, which is composed of materials with general formulas of (A<+>)aMnbO2 and mH2O, wherein, A<+> represents the combination of three ions of sodium, hydrogen and tetramethyl ammonium, a<=0.4, 1<=b<=1.2, and m<0.6. The preparation method comprises the steps of: preparation of Na-type layered manganese dioxide, preparation of H-type layered manganese dioxide, stripping of H-type layered manganese dioxide, assembly reaction of manganese dioxide nano-layers and manganous ions, oxidation of layered manganese oxide of manganous ion intercalation layers, and roasting process. The manganese dioxide pillared layered manganese oxide mesoporous material with disorderly channel structure, uniform aperture and rather large specific surface area and pore volume is prepared by adopting the stripping/recombination process, and the manganese dioxide mesoporous material prepared by the method is tested and has the layer-to-layer spacing of between 0.65 and 0.7nm, aperture distribution of 2 to 40nm, specific surface area of between 80 and 120m<2>/g, pore volume of 0.3 to 0.4m<3>/g, and electric capacity of 150 to 240F/g, and can be used for making materials of super capacitors.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a manganese dioxide mesoporous material. Background technique [0002] With the in-depth study of nano-mesoporous materials, nano-mesoporous metal oxide materials have attracted more and more attention from researchers because of their superiority in electricity, magnetism, light, and catalysis. For example, nano-mesoporous titanium oxide is reported as an excellent photocatalyst, and nano-tin oxide and indium oxide are excellent conductive materials and semiconductor materials. [0003] Due to the abundant natural resources of manganese, low price and non-toxic effect, manganese oxide has become one of the hotspots in the research of mesoporous materials in recent years. Manganese oxide is a new class of inorganic functional materials. Its special physical and chemical properties have shown broad application prospects in catalysis, electrochemistry, adsorption and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02
Inventor 刘宗怀袁佳琦
Owner SHAANXI NORMAL UNIV
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