Preparation method of CuFeO2 microcrystalline material of high-purity 3R delafossite structure

A technology of microcrystalline material and delafossite, which is applied in the field of preparation of high-purity 3R delafossite structure CuFeO2 microcrystalline material, can solve the problems of inconsistency, limited development and research, inaccurate chemical properties of CuFeO2, etc., and achieves low production cost , the effect of easy control of process parameters, important academic value and application prospects

Inactive Publication Date: 2019-11-01
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This fact leads to very serious consequences: the CuFeO 2 Basic physicochemical properties ar

Method used

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  • Preparation method of CuFeO2 microcrystalline material of high-purity 3R delafossite structure
  • Preparation method of CuFeO2 microcrystalline material of high-purity 3R delafossite structure
  • Preparation method of CuFeO2 microcrystalline material of high-purity 3R delafossite structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A high-purity 3R delafossite structure CuFeO 2 The preparation method of microcrystalline material, concrete steps are as follows:

[0034] (1) Adding Cu(NO 3 ) 2 .3H 2 O and Fe(NO 3 ) 3 .9H 2 O is added into deionized water according to a molar ratio of 1:1, fully stirred in a magnetic stirrer for 15min to dissolve, and the stirring speed of the magnetic stirrer is 300 rpm to obtain a mixed solution, in which Cu(NO 3 ) 2 The concentration is 0.5mol / L;

[0035] (2) Add NaOH solution dropwise to the mixed solution in step (1), the concentration of NaOH solution is 4mol / L, the dropping speed is 1.5mL / min, the amount of NaOH is according to Cu(NO 3 ) 2 .3H 2 O and Fe(NO 3 ) 3 .9H 2 9 times the amount of the total substance of O was added, followed by ultrasonication for 12min and magnetic stirring for 12min, the ultrasonic power was 350W, and the stirring speed of the magnetic stirrer was 450 rpm;

[0036] (3) Add n-propionaldehyde dropwise to the solution in...

Embodiment 2

[0039] A high-purity 3R delafossite structure CuFeO 2 The preparation method of microcrystalline material, concrete steps are as follows:

[0040] (1) Adding Cu(NO 3 ) 2 .3H 2 O and Fe(NO 3 ) 3 .9H 2 O is added into deionized water according to a molar ratio of 1:1, fully stirred in a magnetic stirrer for 12min to dissolve, and the stirring speed of the magnetic stirrer is 350 rpm to obtain a mixed solution, in which Cu(NO 3 ) 2 The concentration is 0.6mol / L;

[0041] (2) Add NaOH solution dropwise to the mixed solution in step (1), the concentration of NaOH solution is 2mol / L, the dropping rate is 2.5mL / min, the amount of NaOH is according to Cu(NO 3 ) 2 .3H 2 O and Fe(NO 3 ) 3 .9H 2 6 times the amount of the total substance of O was added, followed by ultrasonication for 15min and magnetic stirring for 15min, the ultrasonic power was 300W, and the stirring speed of the magnetic stirrer was 400 rpm;

[0042] (3) Add n-propionaldehyde dropwise to the solution in ...

Embodiment 3

[0045] A high-purity 3R delafossite structure CuFeO 2 The preparation method of microcrystalline material, concrete steps are as follows:

[0046] (1) Adding Cu(NO 3 ) 2 .3H 2 O and Fe(NO 3 ) 3 .9H 2 O is added into deionized water according to a molar ratio of 1:1, fully stirred in a magnetic stirrer for 11 min to dissolve, and the stirring speed of the magnetic stirrer is 400 rpm to obtain a mixed solution, in which Cu(NO 3 ) 2 The concentration is 0.7mol / L;

[0047] (2) Add NaOH solution dropwise to the mixed solution in step (1), the concentration of NaOH solution is 3mol / L, the dropping rate is 2mL / min, the amount of NaOH is according to Cu(NO 3 ) 2 .3H 2 O and Fe(NO 3 ) 3 .9H 2 5 times the amount of the total substance of O was added, followed by ultrasonication for 15min and magnetic stirring for 15min, the ultrasonic power was 300W, and the stirring speed of the magnetic stirrer was 400 rpm;

[0048] (3) Add n-propionaldehyde dropwise to the solution in s...

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Abstract

The invention discloses a preparation method of a CuFeO2 microcrystalline material of a high-purity 3R delafossite structure. The preparation method comprises the steps: adding Cu(NO3)2.3H2O and Fe(NO3)3.9H2O into deionized water, performing magnetic stirring for dissolution so as to obtain a mixed solution, adding a NaOH solution dropwise to the mixed solution, then performing ultrasonic stirringand magnetic stirring sequentially, then adding n-propionaldehyde dropwise, keeping magnetic stirring until formation of a colloidal suspension, adding the colloidal suspension to a reaction vessel,performing a reaction at 100-180 DEG C for 6-24 h, cooling the kettle body naturally to room temperature after completion of the reaction, opening the kettle body, taking out the reaction product, washing the reaction product, and performing drying so as to obtain the CuFeO2 microcrystalline material of a high-purity 3R delafossite structure. The preparation method has simple operation and easilycontrollable process parameters, no pollution, high yield, completely developed grains and uniformly distributed particle size are achieved, the product can be widely applied to photocatalytic decomposition of water for hydrogen production, degradation of pollutants, photocatalytic reduction of CO2, transparent conductive oxides and ferromagnetic materials and other materials and devices with photoelectric conversion functions.

Description

technical field [0001] The invention relates to a high-purity 3R delafossite structure CuFeO 2 The invention discloses a method for preparing microcrystalline materials, belonging to the field of synthesis and preparation of metal oxide semiconductor materials. Background technique [0002] CuFeO 2 As a secondary delafossite compound, the bottom of the oxidation zone of copper deposits is prevalent, and this conclusion was proposed by Rogers in 1913. CuFeO 2 The crystal structure is composed of two-dimensional close-packed Cu + and Fe 3+ o 6 Octahedrons are stacked alternately along the c-axis. Due to different stacking methods, hexagonal 2H structures (stacked in the way of ... ABABAB ...) and rhombic 3R structures (stacked in the way of ... ABCABC ...) will be formed respectively. Under practical preparation conditions, rhombohedral 3R structures have relatively low formation energies and are therefore more common. CuFeO 2 With excellent photocatalytic performance,...

Claims

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Application Information

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IPC IPC(8): C01G49/00C01B3/04C01B32/40
CPCC01B3/042C01B32/40C01G49/00C01P2002/72C01P2004/03C01P2004/61Y02E60/36
Inventor 刘清路赵宗彦
Owner KUNMING UNIV OF SCI & TECH
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