Delafossite structured CuMnO2 powder and preparation method and application thereof

A delafossite and powder technology, which is applied in the field of copper-copper iron ore structure CuMnO2 powder and its preparation, can solve the problems of unfavorable large-scale industrial production, complicated process and high cost, and achieves the advantages of being suitable for large-scale preparation, good repeatability and reaction consumption. short time effect

Active Publication Date: 2018-11-23
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the invention is to overcome the preparation of delafossite CuMnO in the prior art 2 The method cycle is long, the cost is high, the process is complex, the energy consumption is high, and the defects and deficiencies that are not conducive to large-scale industrial production provide a CuMnO with a delafossite structure 2 Powder Preparation Method

Method used

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  • Delafossite structured CuMnO2 powder and preparation method and application thereof
  • Delafossite structured CuMnO2 powder and preparation method and application thereof
  • Delafossite structured CuMnO2 powder and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) 0.01 mol of Cu (NO 3 ) 2 ·3H 2 O and 0.01 mol of Mn (NO 3 ) 2 4H 2 O was dissolved in deionized water (40 mL) to make it a saturated solution, then 0.02 mol of citric acid and 0.5 g of PEG20000 were added, and the whole mixture was fully stirred to dissolve to obtain Cu-containing 2+ and containing Mn 2+ aqueous solution; then slowly add NH 3 ·H 2 O, adjust the pH value of the solution in the range of 2-3, and obtain the reaction precursor after fully stirring.

[0033] (2) Put the precursor solution in a drying oven and dry it at 110 °C for 24 h. The obtained powder was ground with an agate mortar, and then the sample was placed in a muffle furnace, and the temperature was raised at a rate of 5 °C / min. After being kept at 900 °C for 5 h, it was cooled in the furnace, and finally the sample was placed in N 2 In the atmosphere furnace of the atmosphere, the temperature was raised to 1100 °C at a rate of 5 °C / min for 2 h, and then cooled with the furnace to o...

Embodiment 2

[0035] This embodiment provides a delafossite structure CuMnO 2 The preparation method of the powder, except that the consumption of citric acid is 0.04mol, all the other steps and conditions are consistent with Example 1.

[0036] This example can successfully prepare CuMnO with delafossite structure 2 powder.

Embodiment 3

[0038]This embodiment provides a delafossite structure CuMnO 2 The preparation method of the powder is consistent with that of Example 1 except that 1 g of PEG2000 is selected.

[0039] This example can successfully prepare CuMnO with delafossite structure 2 powder.

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Abstract

The invention relates to delafossite structured CuMnO2 powder and a preparation method and application thereof. The preparation method comprises the following steps: S1, dissolving divalent copper salt and divalent manganese salt, adding citric acid and PEG, stirring for dissolving, and adjusting the PH value to 2 to 3 with NH3.H2O, so as to obtain a reaction precursor; and S2, drying the reactionprecursor, grinding into powder, and performing annealing treatment in the process of heating to 900 to 1,200 DEG C at a heating rate of 5 to 15 DEG C per minute under an air atmosphere, maintainingthe temperature for 4 to 6 hours, then performing heat preservation at 1,000 to 1,200 DEG C for 2 to 4 hours under an inert atmosphere, and cooling. The preparation method provided by the invention has the advantages of short cycle and high purity, and is suitable for large-scale preparation and favorable to industrial production; and the CuMnO2 powder has high hole mobility, good photochemical stability and high conduction band energy.

Description

technical field [0001] The invention belongs to the field of synthesis and preparation of delafossite structure, in particular to CuMnO with a delafossite structure 2 Powders and methods of preparation and applications thereof. Background technique [0002] Ternary copper-containing oxides (delafossite structure) have the advantages of high hole mobility, photochemical stability, and high conduction band energy, as well as special optical, electrical, and magnetic properties. Ion batteries and fluorescent materials have a wide range of applications. With a large number of p-type copper iron oxides (such as CuAlO 2 , CuCrO 2 , CuFeO 2 and CuGaO 2 ) compared to CuMnO 2 It is also one of the p-type semiconductors with a delafossite structure, and its direct bandgap is 1.23eV, which is close to the ideal value required for photoelectrochemical applications. Due to its good chemical stability in alkaline electrolytes and its sufficient flat-band potential, it is a potentia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/12B01J23/889
CPCB01J23/002B01J23/8892B01J35/004C01G45/1228C01P2002/72C01P2002/85C01P2004/03
Inventor 毛凌波刘灵云
Owner GUANGDONG UNIV OF TECH
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