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Preparation method of chromic oxide nano-material

A technology of chromium trioxide and nanomaterials, which is applied in the field of preparation of inorganic non-metallic materials, can solve the problems of expensive alkoxides and unfavorable large-scale production, and achieve low preparation costs, easy operation control, and simple preparation process routes Effect

Inactive Publication Date: 2017-02-22
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the sol-gel method is an ideal, simple and easy method for preparing chromium trioxide nanomaterials, it generally uses expensive alkoxides, which is not conducive to large-scale industrial production.

Method used

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  • Preparation method of chromic oxide nano-material
  • Preparation method of chromic oxide nano-material
  • Preparation method of chromic oxide nano-material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Accurately weigh chromium acetylacetonate and put it into methanol (12C, 99.95%), stir and dissolve, and prepare a methanol solution of chromium acetylacetonate with a molar concentration of 0.01mol / L. The methanol solution obtained is carried out solvothermal reaction, and the solvothermal reaction temperature is 220 ℃, and the solvothermal reaction time is 24 hours. After the solvothermal reaction was completed, it was naturally cooled to room temperature, and the product obtained by the reaction was filtered and washed and placed in an oven at a programmed temperature increase rate of 5°C / min, and dried at 100°C for 3 hours. Then place it in a muffle furnace for calcination, the calcination time is 2 hours, the calcination temperature is 800 °C, and the heating rate is 10 °C / min. Chromium trioxide nanomaterials were obtained after natural cooling, with a size of 30 nm, and the yield of the product was 99.9%. The purity of the product is 99.98%, and the impurity carb...

Embodiment 2

[0033] Accurately weigh chromium acetylacetonate and put it into methanol (12C, 99.95%), stir and dissolve, and prepare a methanol solution of chromium acetylacetonate with a molar concentration of 0.02mol / L. The methanol solution obtained is carried out solvothermal reaction, and the solvothermal reaction temperature is 110 ℃, and the solvothermal reaction time is 48 hours. After the solvothermal reaction was completed, it was naturally cooled to room temperature, and the product obtained by the reaction was filtered and washed and placed in an oven at a programmed temperature increase rate of 5°C / min, and dried at 60°C for 5 hours. Then place it in a muffle furnace for calcination, the calcination time is 4 hours, the calcination temperature is 800 °C, and the heating rate is 20 °C / min. Chromium trioxide nanomaterials were obtained after natural cooling, with a size of 50 nm, and the yield of the product was 99.5%. The purity of the product is 99.95%, and the impurity carbo...

Embodiment 3

[0035] Accurately weigh chromium acetylacetonate and put it into methanol (12C, 99.95%), stir and dissolve, and prepare a methanol solution of chromium acetylacetonate with a molar concentration of 0.05mol / L. The methanol solution obtained is carried out solvothermal reaction, and the solvothermal reaction temperature is 200 ℃, and the solvothermal reaction time is 12 hours. After the solvothermal reaction was completed, it was naturally cooled to room temperature, and the product obtained by the reaction was filtered and washed and placed in an oven at a programmed temperature increase rate of 5°C / min, and dried at 120°C for 1 hour. Then place it in a muffle furnace for calcination, the calcination time is 6 hours, the calcination temperature is 800 °C, and the heating rate is 10 °C / min. Chromium trioxide nanomaterials were obtained after natural cooling, with a size of 40 nm, and the yield of the product was 99.6%. The purity of the product is 99.96%, and the impurity carbo...

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Abstract

The invention belongs to the field of inorganic non-metallic material preparation and particularly relates to a preparation method of a chromic oxide nano-material. The preparation method includes the steps that after chromium acetylacetonate is fully dissolved in a methanol solution, a solvothermal reaction is carried out, after filtering and washing are carried out, drying, calcining and cooling are carried out, and the chromic oxide nano-material is obtained. The process is simple, convenient and easy to carry out, product purity is high, the preparation cost is low, the size of the obtained product ranges from 30 nm to 50 nm, the uniformity and dispersity of the product is good, and the product is easily applied to practical large-scale production. The prepared chromic oxide nano-material can be used for the fields of enamel, ceramic, artificial leather, sun-proof paint, grinding materials, green polishing paste, printing ink special for printing paper money and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic non-metallic materials, and in particular relates to a preparation method of chromium trioxide nanometer material. Background technique [0002] Chromium trioxide (Cr 2 o 3 ) crystal structure is corundum structure, and a-Al 2 o 3 The structure is similar. Cr 2 o 3 It has good stability to acid and alkali, and does not react with acid and alkali under normal conditions. Chromium trioxide has been widely concerned due to its important role in national defense technology and basic science. Nano-chromium trioxide is an important inorganic fine chemical widely used in metallurgical and chemical industries. Chromium trioxide is mainly used for smelting metal chromium and chromium carbide. In the chemical industry, dichromium trioxide is used for enamel, ceramics, artificial leather, colorants for construction materials, catalytic sun-resistant coatings, catalysts for organic sy...

Claims

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Application Information

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IPC IPC(8): C01G37/02B82Y40/00
CPCC01G37/02C01P2002/72C01P2002/84C01P2004/03C01P2004/64C01P2006/80
Inventor 张杰许家胜张艳萍王莉丽崔岩
Owner BOHAI UNIV
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