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

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,...

AI Technical Summary

Problems solved by technology

This fact leads to very serious consequences: the CuFeO 2 Basic physicochemical properties are often inaccurate and inconsistent, limiting further development and research on the material

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