Method for preparing CuCrO2 powder

Abstract

The invention provides a method for preparing CuCrO2 powder. The method comprises the following steps: (1) preparing a water solution with equal mole number and the total mass concentration of 5-20%; (2) adding a composite combustion agent water solution into the solution obtained in (1), wherein the composite combustion agent water solution is a glycine and citric acid mixture; (3) adding an inorganic salt solution into the solution obtained in (2); (4) adding ammonium hydroxide to regulate the pH value of the solution obtained in (3) to be 2.5-5.5; (5) heating up the solution obtained in (4) for combustion, and after finish of combustion, collecting grey powder; and (6) grinding and roasting to obtain CuCrO2 powder. The obtained CuCrO2 powder is small in granularity, uniform in dispersion, high in purity and good in crystalline perfection, and represents favorable water-splitting activity for hydrogen production after being compounded with WO3.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of photocatalytic material preparation, specifically a kind of CuCrO 2 Method of powder preparation. [0003] technical background [0004] Photocatalytic water splitting for hydrogen production is a clean hydrogen production method, and the preparation technology of photocatalyst is the key to photocatalytic technology. A large number of experimental results show that the P-N composite catalyst composed of P-type semiconductor material and N-type semiconductor material will show more excellent photocatalytic performance. CuCrO 2 As a copper-iron ore material, it has stable performance and low price. CuCrO 2 It has the characteristics of P-type conductivity, can absorb visible light, and the conduction band potential is relatively negative. It has the performance of photocatalytic water splitting and dehydrogenation, and is an ideal type of photocatalytic material. As a photocatalytic material, Cu...

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Problems solved by technology

CuCrO 2 Usually produced by solid-phase method or sol-gel method, the sample size obtained by solid-phase method is relatively large, and the crystal integrity is not ideal, and the preparation process of sol-gel method is relatively complicated (CN1191201C)

Literature (Journal of China Ceramics, 2015, 43 (1): 109-115) reported a combustion method using glycine, urea or ethylene glycol as a combustion agent to synthesize CuCrO 2 technology, but made CuCrO 2 The particle size is large, between 0.5-1μm, and the particle size distribution is not very ideal

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