Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of cobalt-doped molybdenum disulfide with yolk-eggshell structure

An eggshell and egg yolk technology, which is applied in the preparation field of cobalt-doped molybdenum disulfide nanomaterials, can solve the problems of long preparation time, difficult removal of template agents, low product purity, etc., and achieves simple reaction steps, reduced introduction of impurities, Simple effect of product separation

Pending Publication Date: 2021-06-11
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the soft template method has the problems that the template agent is difficult to remove, the purity of the obtained product is not high, and the preparation time is long.
Currently, facile fabrication of high-quality eggshell-yolk structured nanomaterials remains a major challenge

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of cobalt-doped molybdenum disulfide with yolk-eggshell structure
  • Preparation method of cobalt-doped molybdenum disulfide with yolk-eggshell structure
  • Preparation method of cobalt-doped molybdenum disulfide with yolk-eggshell structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 2mmol molybdenum isooctanoate, 0.2mmol cobalt isooctanoate and 8.8mmol L-cysteine ​​in a 100ml beaker, then add 25ml ethanol and 25ml deionized water to the beaker, and stir at 500rpm for 30min. The resulting suspension was transferred to a 100ml high-pressure reactor, and kept at 200°C for 16 hours. After natural cooling, suction filtration, the precipitate was washed with deionized water and absolute ethanol, and then vacuum-dried at 70°C for 12 hours to obtain a black powder. ICP data indicate that the resulting Co / MoS 2 The cobalt-molybdenum ratio in the medium is close to the feed ratio of the cobalt source and the molybdenum source (see Table 1), which shows that the cobalt source and the molybdenum source have been fully utilized. XRD characterization shows only 2H-MoS in the obtained black powder 2 The characteristic peaks indicate that cobalt species are uniformly dispersed in molybdenum disulfide or exist in an amorphous state. At the same time, the d...

Embodiment 2

[0022] Weigh 2mmol of molybdenum acetylacetonate, 0.2mmol of cobalt acetylacetonate and 8.8mmol of L-cysteine ​​in a 100ml beaker in sequence, then add 50ml of ethanol into the beaker, and stir at 500rpm for 30min. The resulting solution was transferred to a 100ml high-pressure reactor, kept at 200°C for 16 hours, cooled naturally, filtered with suction, the precipitate was washed with deionized water and absolute ethanol, and then vacuum-dried at 70°C for 12 hours to obtain a black powder. ICP data indicate that the resulting Co / MoS 2 The cobalt-molybdenum ratio in the medium is close to the feed ratio of the cobalt source and the molybdenum source (see Table 1), which shows that the cobalt source and the molybdenum source have been fully utilized. XRD characterization shows only 2H-MoS in the obtained black powder 2 The characteristic peaks indicate that cobalt species are uniformly dispersed in molybdenum disulfide or exist in an amorphous state. At the same time, the dif...

Embodiment 3

[0024] Weigh 2mmol molybdenum isooctanoate, 0.2mmol cobalt isooctanoate and 8.8mmol thiourea in a 100ml beaker in turn, then add 25ml ethanol and 25ml deionized water to the beaker, and stir at 500rpm for 30min. The resulting suspension was transferred to a 100ml high-pressure reactor, and kept at 200°C for 16 hours. After natural cooling, suction filtration, the precipitate was washed with deionized water and absolute ethanol, and then vacuum-dried at 70°C for 12 hours to obtain a black powder. ICP data indicate that the resulting Co / MoS 2 The cobalt-molybdenum ratio in the medium is close to the feed ratio of the cobalt source and the molybdenum source (see Table 1), which shows that the cobalt source and the molybdenum source have been fully utilized. XRD characterization shows only 2H-MoS in the obtained black powder 2 The characteristic peaks indicate that cobalt species are uniformly dispersed in molybdenum disulfide or exist in an amorphous state. At the same time, t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for solvothermal synthesis of cobalt-doped molybdenum disulfide (Co / MoS2) with a yolk-eggshell structure. The method comprises the following steps: adding an organic molybdenum source, an organic cobalt source and an organic sulfur source into a mixed solvent of ethanol and water or ethanol according to a Co / Mo molar ratio of 0.03 to 1 and an S / (Mo + Co) molar ratio of 10: 1 to 2: 1, carrying out heat preservation on the obtained solution or suspension at 120-200 DEG C for 4-48 hours, and carrying out Ostwald ripening to obtain the Co / MoS2 with the yolk-eggshell structure. The preparation process is simple to operate, the preparation time is short, a template agent and a reducing agent do not need to be additionally added, and large-scale production can be realized. The prepared Co / MoS2 with the eggshell-yolk structure can be applied to the fields of electrode materials, lubricating materials, catalysis and the like, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of synthesis of inorganic nanomaterials, in particular to a method for preparing cobalt-doped molybdenum disulfide nanomaterials with an egg yolk-eggshell structure. Background technique [0002] The Yolk-Shell structure is a new type of nano-multiphase composite material formed on the basis of the core-shell structure by introducing a gap between the core and the shell through certain technical means. Different performance goals can be achieved through the selection of the core and shell and the adjustment of the structure, making this material have broad application prospects in the fields of catalysts, electrode materials, drug loading, and lubricant materials. The egg yolk-eggshell structure presents a special configuration of core@void@shell, which is different from the common core-shell structure. The components are relatively independent, the core can move freely within the range of the gap, and the shell prote...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01G39/06B82Y30/00B82Y40/00
CPCC01G39/06B82Y30/00B82Y40/00C01P2002/72C01P2004/03C01P2004/04C01P2004/32C01P2004/62C01P2004/64
Inventor 田志坚王小平马怀军王冬娥郑安达王帅旗
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com