Method for synthesizing pyrite type ferrous disulfide by hydro-thermal method

A technology of pyrite type and iron disulfide, which is applied in the direction of iron sulfide, can solve the problems of small particle size and good dispersibility, and achieve the effect of small particle size, good dispersibility and no poisonous effect

Inactive Publication Date: 2013-05-01
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to provide a method for synthesizing pyrite-type iron disulfide by a hydrothermal method, which solves the problem that the prod

Method used

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  • Method for synthesizing pyrite type ferrous disulfide by hydro-thermal method
  • Method for synthesizing pyrite type ferrous disulfide by hydro-thermal method

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Embodiment 1

[0026] By n(FeCl 2 ): n(Na 2 S): n (S) = 1: 2: 1 molar ratio is mixed with an appropriate amount of deionized water, the mixture is heated until the elemental sulfur is completely dissolved to obtain a mixed solution, and then the mixed solution is transferred to a 100ml hydrothermal kettle, With 2.0mol / L NaOH solution and 1.4mol / LH 2 SO 4 solution to adjust the pH value of the mixed solution to 5, add deionized water to the hydrothermal kettle until the final volume of the reaction solution is 80ml; then perform a constant temperature hydrothermal reaction at 160°C for 24 hours; after naturally cooling down to room temperature, use dilute Sulfuric acid, boiling Na 2 S solution, distilled water wash, obtain pyrite type iron disulfide; figure 1 Middle a is the XRD pattern of this embodiment product.

Embodiment 2

[0028] By n(FeCl 2 ): n(Na 2 S): n (S) = 1: 2: 1 molar ratio is mixed with an appropriate amount of deionized water, the mixture is heated until the elemental sulfur is completely dissolved to obtain a mixed solution, and then the mixed solution is transferred to a 100ml hydrothermal kettle, With 2.0mol / L NaOH solution and 1.4mol / LH 2 SO 4 solution to adjust the pH value of the mixed solution to 9, add deionized water to the hydrothermal kettle until the final volume of the reaction solution is 80ml; then conduct a constant temperature hydrothermal reaction at 200°C for 12 hours; after naturally cooling to room temperature, use dilute Sulfuric acid, boiling Na 2 S solution, distilled water wash, obtain pyrite type iron disulfide; figure 1 Middle b is the XRD collection of collections of this embodiment product, figure 2 It is the scanning electron micrograph of the product of this embodiment.

Embodiment 3

[0030] By n(FeCl 2 ): n(Na 2 S): n (S) = 1: 2: 1 molar ratio is mixed with an appropriate amount of deionized water, the mixture is heated until the elemental sulfur is completely dissolved to obtain a mixed solution, and then the mixed solution is transferred to a 100ml hydrothermal kettle, With 2.0mol / L NaOH solution and 1.4mol / LH 2 SO 4 solution to adjust the pH value of the mixed solution to 12, add deionized water to the hydrothermal kettle until the final volume of the reaction solution is 80ml; then conduct a constant temperature hydrothermal reaction at 140°C for 18 hours; after naturally cooling to room temperature, use dilute Sulfuric acid, boiling Na 2 S solution, distilled water wash, obtain pyrite type iron disulfide; figure 1 Middle c is the XRD pattern of this embodiment product.

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Abstract

The invention discloses a synthesizing pyrite type ferrous disulfide by a hydro-thermal method. The method comprises the following steps: taking ferrous chloride, sodium sulfide and elemental sulfur as raw materials; adjusting the pH value of a reaction solution to 5-12; carrying out hydro-thermal reaction at the temperature of 110-200DEG C for 12-24 hours to obtain the synthesizing pyrite type ferrous disulfide. According to the method, phase and morphology of a product are controlled by adjusting the pH value to obtain pyrite type ferrous disulfide cube-shaped granules with small granularity and favorable dispersion; the problem that the product contains associated phase marcasite when pyrite is synthesized by the hydro-thermal method is solved; and in addition, the method is simple in process and low in cost and has high application values.

Description

technical field [0001] The invention belongs to the technical field of iron disulfide preparation, and in particular relates to a method for synthesizing pyrite-type iron disulfide by a hydrothermal method. Background technique [0002] Iron disulfide is usually a positive electrode material for thermal batteries, and it has good application prospects in the fields of solar cells and lithium batteries. The particle size and phase of iron disulfide will affect the physical and chemical properties of the material. Synthesizing micro-nano materials with uniform particle size will help to study the effect of particle size on material properties and explore the potential application value of materials. Iron disulfide has two variants of pyrite and marcasite. The physical and chemical properties of different phases will have some differences. The conduction band of cubic pyrite is 0.95ev, and that of monoclinic marcasite The conduction band is 0.3 eV, and the presence of marcasit...

Claims

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Application Information

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IPC IPC(8): C01G49/12
Inventor 杨兆堂刘效疆冯秀丽李利琼杨潇薇
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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