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Preparation method of gamma-copper iodide

A technology of cuprous iodide and copper flakes, which is applied in the field of preparation of γ-cuprous iodide, can solve the problems of decreased iodine utilization rate, difficulty in product separation, waste of iodine resources, etc., and achieves easy control of reaction conditions and particle size distribution. Uniform, yield-enhancing effect

Active Publication Date: 2017-09-26
NINGBO UNIV
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Problems solved by technology

The deficiency that this method exists, mainly is that reaction is divided into two steps in the preparation process at first iodine salt and copper salt reaction obtains copper iodide, then utilizes copper iodide to prepare cuprous iodide unstablely in solution, in the second step process A large amount of free iodine will be produced in the product, and the separation of the product is difficult so that the utilization rate of iodine decreases, the cost increases, and the recovery rate of free iodine is not very high, resulting in a waste of iodine resources
The preparation of cuprous iodide by sol-gel method is based on copper salt and metal alkoxide. In this process, the cost of raw metal alkoxide is high and the organic solvent is harmful to the human body.

Method used

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Examples

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example 1

[0018] A preparation method of nanometer gamma-cuprous iodide, the steps are as follows:

[0019] (1) Preparation of iodine solution: Dissolve 0.51g of iodine elemental substance in a round-bottomed flask filled with 2g of 1-butyl 3-methylimidazolium tetrafluoroborate ionic liquid, seal the round-bottomed flask and place the round-bottomed flask The internal ionic liquid is heated to 100°C, and maintained at 100°C for a period of time until the iodine element is completely dissolved to obtain an iodine solution;

[0020] (2) Preparation of cuprous iodide: Put the polished copper sheet (about 0.38g) into the iodine solution, continue to control the temperature at 100°C and heat and stir until the color of the solution becomes colorless, cool to room temperature, and take out the bottom of the solution The precipitate was washed with deionized water and ethanol several times, and dried in vacuum to obtain 0.750 g of white γ-cuprous iodide, with a yield of 98.1%.

[0021] Depend...

example 2

[0023] A preparation method of gamma-cuprous iodide, the steps are as follows:

[0024] (1) Preparation of iodine solution: Dissolve 0.51g of iodine elemental substance in a round-bottomed flask filled with 2g of 1-butyl 3-methylimidazolium tetrafluoroborate ionic liquid, seal the round-bottomed flask and place the round-bottomed flask The internal ionic liquid is heated to 150°C, and maintained at 150°C for a period of time until the elemental iodine is completely dissolved to obtain an iodine solution;

[0025] (2) Preparation of cuprous iodide: Put the polished copper sheet (about 0.38g) into the iodine solution, continue to control the temperature at 150°C and heat and stir until the color of the solution becomes colorless, cool to room temperature, and take out the bottom of the solution The precipitate was washed with deionized water and ethanol several times, and vacuum-dried to obtain 0.755 g of white nanometer γ-cuprous iodide, and the yield of the product was 98.7%. ...

example 3

[0027] A preparation method of gamma-cuprous iodide, the steps are as follows:

[0028] (1) Preparation of iodine solution: Dissolve 0.51g of iodine elemental substance in a round-bottomed flask filled with 2g of 1-butyl 3-methylimidazolium hexafluorophosphate ionic liquid, seal the round-bottomed flask and place in the round-bottomed flask The ionic liquid is heated to 80°C and maintained at 80°C for a period of time until the iodine element is completely dissolved to obtain an iodine solution;

[0029] (2) Preparation of cuprous iodide: Put the polished copper sheet (about 0.38g) into the iodine solution, continue to control the temperature at 80°C and heat and stir until the color of the solution becomes colorless, cool to room temperature, and take out the bottom of the solution The precipitate was washed with deionized water and ethanol several times, and vacuum-dried to obtain 0.745 g of white γ-cuprous iodide, with a yield of 97.4%.

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Abstract

The invention discloses a preparation method of gamma-copper iodide. The preparation method is characterized by including: dissolving elemental iodine into tetrafluoroborate and hexafluorophosphate ionic liquid, and controlling heating temperature to be 80-150 DEG C under a sealed state to completely dissolve the elemental iodine to obtain an iodine solution; placing a cleanly-polished copper sheet into iodine ion solution, heating under controlled temperature until the solution is nearly colorless, cooling to room temperature, taking out precipitate at the bottom of the solution, repeatedly washing with deionized water and ethanol, and performing vacuum drying to obtain the gamma-copper iodide. The preparation method is high in iodine utilization rate, low in cost, simple in operation process, environmentally friendly, free of pollution and high in product yield and purity.

Description

technical field [0001] The invention relates to a preparation method of gamma-cuprous iodide, which belongs to the technical field of chemical industry. Background technique [0002] Inorganic materials have attracted extensive attention due to their high application value in electronics, optics, catalysis and ceramics. Preparation of inorganic materials with different structures and exploring their potential application value have become a research hotspot in recent years. As potential "green" solvents, ionic liquids have many excellent properties that cannot be compared with traditional solvents, and have attracted extensive research in the fields of organic synthesis, catalysis, liquid-liquid separation and extraction. The preparation of inorganic materials in the field of ionic liquids is a relatively new branch of development, which has been used to synthesize a variety of inorganic materials with unique structures and properties. [0003] Cuprous iodide is a p-type s...

Claims

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Application Information

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IPC IPC(8): C01G3/04
CPCC01G3/04C01P2002/72C01P2004/03C01P2004/61C01P2006/80
Inventor 孙明娟潘建国潘尚可王景殷洁
Owner NINGBO UNIV
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