Method for preparing CuCrO2 powder

A technology of powder and copper nitrate, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems such as unsatisfactory particle size distribution, unsatisfactory crystallization integrity, large CuCrO particle size, etc., to achieve Good crystallization integrity, good water splitting hydrogen production activity, uniform dispersion effect

Inactive Publication Date: 2017-06-09
HEBEI UNIV OF TECH
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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

Method used

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  • Method for preparing CuCrO2 powder
  • Method for preparing CuCrO2 powder

Examples

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Embodiment 1

[0023] (1) Weigh 4g copper nitrate trihydrate (0.016556mol) and 6.624g chromium nitrate nonahydrate (0.016556mol), put it into a tall beaker, add deionized water to make copper nitrate+chromium nitrate total mass concentration is 10% aqueous solution;

[0024] (2) Glycine is weighed in a ratio of 1.4:1 by a molar ratio with copper nitrate, and citric acid is weighed in a molar ratio of glycine: citric acid is a ratio of 10:1, and the total mass concentration of glycine+citric acid is 20%. Aqueous solution, and join in (1) gained solution, stir 10 minutes;

[0025] (3) taking sodium chloride in a ratio of 0.1:1 by mass ratio with copper nitrate, and being mixed with a solution whose mass concentration is 10%, then adding it to (2) gained solution;

[0026] (4) adjusting the pH value of the solution obtained in (3) to 3 with a mass concentration of 10% ammonia;

[0027] (5) Heat the solution obtained in (4) on a water bath at 85°C, and at the same time perform electric stirrin...

Embodiment 2

[0031] Take the method identical with embodiment 1 to prepare CuCrO 2 , the difference is that the dispersant replaces sodium chloride with potassium chloride, and the addition of potassium chloride is that the mass ratio of potassium chloride and copper nitrate is 0.08:1, and all the other preparation conditions are the same as in Example 1.

Embodiment 3

[0033] Take the method identical with embodiment 1 to prepare CuCrO 2 , the difference is that the molar ratio of the composite combustion agent glycine and citric acid becomes 5:1, and the rest of the preparation conditions are the same as in Example 1.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/86
CPCB01J23/868B01J35/004
Inventor 王桂赟宋立佳杨欢张广林田伟松王延吉赵新强
Owner HEBEI UNIV OF TECH
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