Preparation method for monodisperse cobaltous sulfide hollow sandwich microsphere

A cobalt sulfide, monodisperse technology, applied in cobalt sulfide, chemical instruments and methods, inorganic chemistry, etc., to achieve excellent electrochemical performance and electromagnetic performance, high yield, and convenient operation

Inactive Publication Date: 2019-11-19
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the preparation of hollow microsphere metal sulfide electrode materials and microwave absorber materials.

Method used

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  • Preparation method for monodisperse cobaltous sulfide hollow sandwich microsphere
  • Preparation method for monodisperse cobaltous sulfide hollow sandwich microsphere
  • Preparation method for monodisperse cobaltous sulfide hollow sandwich microsphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1: Weigh 0.004mol of cobalt nitrate and 1.0g of PVP and dissolve them in 80ml of mixed reaction solvent with ultrasonic stirring at room temperature. The volume ratio of glycerol and isopropanol in the mixed reaction solvent is 1:3. After the metal salt and surfactant are completely dissolved, pour into a hydrothermal synthesis kettle with a volume of 100ml and react at 160°C for 12 hours, cool naturally to room temperature, wash with water, wash with alcohol, centrifuge, and dry to obtain the solid microsphere metal alkoxide precursor;

[0027] Step 2: Ultrasonically disperse 0.1g of the solid microsphere metal alkoxide precursor at room temperature into 20ml of absolute ethanol solution containing 0.3g of thioacetamide, inject into a hydrothermal synthesis kettle with a volume of 25ml, and react for 8h at 180°C, and cool naturally to room temperature, washed with water, washed with alcohol, centrifuged and dried to obtain the metal sulfide with hollow sandwich mic...

Embodiment 2

[0030] Step 1: Weigh 0.006 mol of cobalt nitrate and 0.5 g of CTAB and dissolve them in 80 ml of mixed reaction solvent with ultrasonic stirring at room temperature. The volume ratio of glycerol and isopropanol in the mixed reaction solvent is 1:5. After the metal salt and surfactant are completely dissolved, inject into a hydrothermal synthesis kettle with a volume of 100ml at 200°C for 8 hours, cool naturally to room temperature, wash with water, wash with alcohol, centrifuge, and dry to obtain the solid microsphere metal alkoxide precursor;

[0031] Step 2: Ultrasonically disperse 0.1g of solid microsphere metal alkoxide precursor into 20ml of absolute ethanol solution containing 0.1g of thioacetamide at room temperature, inject into a hydrothermal synthesis kettle with a volume of 25ml, and react for 12h at 140°C for vulcanization, and cool naturally to room temperature, washed with water, washed with alcohol, centrifuged, and dried to obtain a metal sulfide with a hollow s...

Embodiment 3

[0034] Step 1: Weigh 0.008 mol of cobalt nitrate and 1.0 g of SDBS and dissolve them in 80 ml of mixed reaction solvent with ultrasonic stirring at room temperature. The volume ratio of glycerol and isopropanol in the mixed reaction solvent is 1:7. After the metal salt and surfactant are completely dissolved, inject into a hydrothermal synthesis kettle with a volume of 100ml and react at 180°C for 8 hours, cool naturally to room temperature, wash with water, wash with alcohol, centrifuge, and dry to obtain a solid microsphere metal alkoxide precursor;

[0035] Step 2: Ultrasonically disperse 0.1g of solid microsphere metal alkoxide precursor in 20ml of anhydrous ethanol solution containing 0.2g of sodium sulfide at room temperature, inject into a hydrothermal synthesis kettle with a volume of 25ml for sulfidation reaction at 160°C for 10h, and cool naturally to room temperature , washed with water, washed with alcohol, centrifuged and dried to obtain the hollow sandwich microsp...

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Abstract

The invention provides a preparation method for a monodisperse cobaltous sulfide hollow sandwich microsphere, belonging to the technical field of preparation of functional materials. The preparation method comprises the following steps: dissolving a metal salt and a surfactant in a mixed reaction solvent under ultrasonic stirring at room temperature to obtain a reaction solution; injecting the reaction solution into a hydrothermal synthesis kettle, performing a closed high-temperature high-pressure hydrothermal reaction, and then carrying out cooling and washing to obtain a solid microsphere metal alkoxide precursor; and finally, dispersing the metal alkoxide precursor in an anhydrous ethanol solvent containing a vulcanizing agent, and carrying out hydrothermal reaction to obtain the cobaltous sulfide microsphere with a hollow shell structure, a uniform shell thickness and sufficient strength. The cobaltous sulfide hollow sandwich microsphere prepared in the invention has excellent electrochemical performance and electromagnetic performance, and can be used in the fields of storage and conversion of energy and absorption and shielding of electromagnetic waves.

Description

technical field [0001] The invention provides a method for preparing monodisperse hollow cobalt sulfide microspheres, belonging to the technical field of functional material preparation. Background technique [0002] At present, metal sulfides (CoS) are widely used in fuel cells due to their high theoretical specific capacity, abundant oxidation-reduction reaction active sites, low toxicity and low cost, and excellent electrochemical and electromagnetic properties. , lithium ion batteries, super capacitors and other energy storage components and electromagnetic wave absorption fields. Hollow microspheres have attracted extensive attention due to their special structure, controllable composition and morphology. However, there are few reports on the preparation of hollow microsphere metal sulfide electrode materials and microwave absorber materials. In view of this, it is of great practical research significance to develop a hollow microsphere metal sulfide electrode materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00
CPCC01G51/30C01P2004/34C01P2004/61
Inventor 陈平徐东卫陈冠震于祺熊需海陈博涵
Owner DALIAN UNIV OF TECH
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