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Method for synthesizing silver indium sulfide heterojunction structure nano material through hydro-thermal mode

A technology of silver indium sulfide and heterostructure, which is applied in the field of hydrothermal synthesis of silver indium sulfide heterostructure nanomaterials, can solve the problems of high reaction temperature, complex reaction conditions, hidden safety hazards and the like, and achieves high product purity and raw material. Simple and effective in improving lithium battery performance

Active Publication Date: 2014-07-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the lithium battery of indium sulfide has a high theoretical capacity (about 710 mAh g -1 ), in lithium battery research, indium sulfide has also become the attention of many research groups (Cryst. Growth Des., 2009, 9, 113, J. Mater. Chem., 2011, 21, 17063, J. Mater. Chem. , 2011, 21, 18398, J. Mater. Chem., 2012, 22, 11107), but the synthesis of indium sulfide nanomaterials mostly requires relatively complex reaction conditions, long reaction time, and some high reaction temperatures bring safety hazards At the same time, the performance of lithium battery needs to be further improved

Method used

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  • Method for synthesizing silver indium sulfide heterojunction structure nano material through hydro-thermal mode
  • Method for synthesizing silver indium sulfide heterojunction structure nano material through hydro-thermal mode
  • Method for synthesizing silver indium sulfide heterojunction structure nano material through hydro-thermal mode

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Experimental program
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Effect test

Embodiment 1

[0032] Follow the preparation process. First drop 2ml of the alcohol suspension of silver nanowires into 23ml of deionized water, and magnetically stir for 5 minutes, then add 0.231g of solid indium trichloride tetrahydrate to the previous mixture, and magnetically stir for 7 minutes to obtain a new mixture ;Add 260mg cetyltrimethylammonium bromide and continue stirring for 10 minutes; finally add 178mg thioacetamide and magnetically stir for 10 minutes to obtain the reaction precursor. The mixed solution was injected into a 100ml three-necked round bottom flask, and placed in a reaction heating reaction system with a reflux device while refluxing at a constant temperature. The reaction conditions were: 95°C, 80min. After the reaction, the solution was centrifuged at 10000r / min for 15min. The solid obtained after repeated centrifugation 5 times was vacuum dried at room temperature into a powder. For the transmission electron microscopy test sample, a small amount of the solid...

Embodiment 2

[0034] Follow the preparation process. Add 0.231g of indium trichloride tetrahydrate into a beaker containing 25ml of deionized water, and magnetically stir for 7 minutes to obtain a transparent and clear solution; add 260mg of cetyltrimethylammonium bromide and continue to stir for 10 minutes; When the solution was still clear, 178 mg of thioacetamide was added and magnetically stirred for 10 minutes to obtain a pale yellow solution, which was used as the reaction precursor. The solution was poured into a 100ml three-necked round-bottom flask, and the reaction heating reaction system with a reflux device was refluxed while keeping constant temperature. The reaction conditions were 95°C, 80min. After the reaction, the solution was centrifuged at 10000r / min for 15min. The solid obtained after repeated centrifugation 5 times was vacuum dried at room temperature into a powder. The scanning electron microscope test sample is to take out a small amount of the solid powder obtained...

Embodiment 3

[0036] Follow the preparation process. Follow the preparation process. First, drop 2mL of the alcohol suspension of silver nanowires into 23ml of deionized water, and magnetically stir for 10 minutes, then add 0.231g of solid indium trichloride tetrahydrate to the previous mixture, and magnetically stir for 7 minutes to obtain a new mixture ; Finally, 178mg of thioacetamide was added and magnetically stirred for 10 minutes to obtain the reaction precursor. The mixed solution was injected into a 100ml three-necked round bottom flask, and the reaction heating reaction system with a reflux device was refluxed while keeping constant temperature. The reaction conditions were: 95°C, 80min. After the reaction, the solution was centrifuged at 10000r / min for 15min. The solid obtained after repeated centrifugation 5 times was vacuum dried at room temperature into a powder. The scanning electron microscope test sample is to take out a small amount of the solid powder obtained after dry...

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Abstract

The invention discloses a method for synthesizing a silver indium sulfide heterojunction structure nano material through a hydro-thermal mode. The method comprises steps of dissolving an alcoholic suspension of silver nanowires in de-ionized water, stirring the alcoholic suspension, adding indium trichloride tetrahydrate crystal to the mixing liquid, conducting magetic stirring, adding a certain amount of surface active agent cetyl trimethyl ammonium bromide, stirring the surface active agent cetyl trimethyl ammonium bromide till the surface active agent cetyl trimethyl ammonium bromide is dissolved completely, adding a certain amount of thiacetamide, stirring the thiacetamide till the thiacetamide is dissolved completely, regarding the formed mixing liquid as a precursor solution of the silver indium sulfide heterojunction structure nano material, refluxing and heating the precursor solution in a round bottom flask with three necks by using a hydro-thermal method, changing conditions, and obtaining nano structure materials with different shapes. The reaction system is simple, the reaction temperature is low, the synthesized silver indium sulfide structure is novel, the synthesized composite material yield is high, and the reverse specific discharge capacity of the material is high when the material serves as a lithium material cathode. Besides, the method has good repeatability and operability.

Description

Technical field [0001] The invention relates to a method for preparing a nano material, in particular to a method for hydrothermally synthesizing a silver indium sulfide heterostructure nano material. Background technique [0002] Nanomaterials and nanostructures are the most dynamic research objects in the field of new materials research today and have a very important impact on future economic and social development. They are also the most active and most applied important components of nanotechnology. In terms of practical applications, due to the large specific surface area and unique nanostructure of semiconductor materials such as nano-oxides and sulfides, especially the theoretical specific capacity and specific energy density of lithium batteries, they are considered most likely to be used in the 21st century. Electrode materials are used in energy storage devices such as lithium batteries. Therefore, the electrochemical research of nano-semiconductor materials has becom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G15/00B82Y30/00
Inventor 蒋建中叶方敏姜清奎
Owner ZHEJIANG UNIV
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