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A new phase two-dimensional galena silver telluride synthesized based on two-dimensional tellurium template method and its preparation method and application

A template method and galena technology, applied in the direction of binary selenium/telluride compounds, metal selenide/telluride, etc., can solve the problems of difficult to control product morphology, crystallinity and stoichiometric ratio, by-products, etc., to achieve High crystallinity, high quality effect

Active Publication Date: 2022-03-08
ZHEJIANG LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the two elements react directly, many by-products are easy to appear, and it is difficult to control the morphology, crystallinity and stoichiometric ratio of the product

Method used

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  • A new phase two-dimensional galena silver telluride synthesized based on two-dimensional tellurium template method and its preparation method and application
  • A new phase two-dimensional galena silver telluride synthesized based on two-dimensional tellurium template method and its preparation method and application
  • A new phase two-dimensional galena silver telluride synthesized based on two-dimensional tellurium template method and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] S1: Dissolve 0.1 g of sodium tellurite and 0.5 g of polyvinylpyrrolidone with a molecular weight of 58,000 in 30 mL of deionized water with a conductivity of 18.2 MΩ cm, and stir for 30 minutes under a magnetic stirrer to form a concentration of 0.015 mol / L Solution A, then mixed 1.65mL hydrazine hydrate and 3.3mL ammonia water to form solution B, added to solution A, put into a hydrothermal reaction kettle, sealed and reacted in a 180-degree oven for 36 hours to obtain product C.

[0031] S2: Centrifuge the product C at a speed of 5000rpm for 10 minutes to remove the upper layer solution, then add acetone and deionized water with a conductivity of 18.2MΩ cm to the centrifuge tube and wash it repeatedly three times to obtain a silver-gray two-dimensional tellurium Solution D of nanosheet crystals.

[0032] S3: Dissolve silver nitrate in deionized water with a conductivity of 18.2MΩ•cm to obtain a silver nitrate solution with a concentration of 1mg / mL, add 3mL of silver ...

Embodiment 2

[0034] S1: Dissolve 0.1 g of sodium tellurite and 0.5 g of polyvinylpyrrolidone with a molecular weight of 58,000 in 33 mL of deionized water with a conductivity of 18.2 MΩ cm, and stir for 30 minutes under a magnetic stirrer to form a concentration of 0.014 mol / Solution A of L, then mixed 1.65mL hydrazine hydrate and 3.3mL ammonia water to form solution B, added to solution A, and put into a hydrothermal reaction kettle, sealed and reacted in a 160-degree oven for 34 hours to obtain product C.

[0035] S2: Centrifuge the product C at 4500rpm for 10 minutes to remove the upper layer solution, then add acetone and deionized water with a conductivity of 18.2MΩ cm to the centrifuge tube and wash it repeatedly three times to obtain a silver-gray two-dimensional tellurium Solution D of nanosheet crystals.

[0036] S3: Dissolve silver nitrate in deionized water with a conductivity of 18.2 MΩ·cm to obtain a silver nitrate solution with a concentration of 2.5 mg / mL, add 5 mL of silve...

Embodiment 3

[0045] S1: Dissolve 0.1 g of sodium tellurite and 0.5 g of polyvinylpyrrolidone with a molecular weight of 58,000 in 28 mL of deionized water with a conductivity of 18.2 MΩ cm, and stir for 30 minutes under a magnetic stirrer to form a concentration of 0.016 mol / L solution A, then mixed 1.65mL hydrazine hydrate and 3.3mL ammonia water to form solution B, added it to solution A, put it into a hydrothermal reaction kettle, sealed it, and reacted it in a 165 degree oven for 32 hours to obtain product C.

[0046] S2: Centrifuge the product C at 4000rpm for 10 minutes to remove the upper layer solution, then add acetone and deionized water with a conductivity of 18.2MΩ cm to the centrifuge tube and wash it repeatedly three times to obtain a silver-gray two-dimensional tellurium Solution D of nanosheet crystals.

[0047] S3: Dissolve silver nitrate in deionized water with a conductivity of 18.2 MΩ·cm to obtain a silver nitrate solution with a concentration of 7.5 mg / mL, add 3 mL of ...

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Abstract

The invention discloses a new phase two-dimensional galena silver telluride synthesized based on a two-dimensional tellurium template method and its preparation method and application. The stoichiometric ratio of silver and tellurium is 4.53:3, comprising the following steps: Dissolve sodium bicarbonate and polyvinylpyrrolidone in deionized water, stir the solution with a magnetic stirrer to fully disperse and dissolve, then add hydrazine hydrate and alkaline solution, and put it in a hydrothermal reaction kettle, seal it and put it in an oven for reaction, and you will get The solution was centrifuged and washed to obtain a solution containing silver-gray two-dimensional tellurium nanocrystals, and silver nitrate was dissolved in deionized water to obtain a silver nitrate solution, and the silver nitrate solution was added dropwise to the solution containing silver-gray two-dimensional tellurium nanocrystals. Stir the reaction down, until the silver-gray solution turns yellow-green, continue to add the silver nitrate solution dropwise until it turns gray-green to the end. The invention has high stability and simple method, has an asymmetric central structure, and is used as a nanometer piezoelectric generator.

Description

technical field [0001] The invention relates to the technical field of preparation of two-dimensional nanomaterials, in particular to a new phase two-dimensional galena silver telluride synthesized based on a two-dimensional tellurium template method and its preparation method and application. Background technique [0002] Chalcogenide tellurides show special properties and potential huge applications in many aspects such as information technology, semiconductor science, optoelectronics and thermoelectricity. As a narrow bandgap semiconductor, silver telluride exhibits a large magnetoresistance effect, good electrical conductivity and potential thermoelectric properties. In the silver telluride system, the ratio of silver to tellurium can be between 1:1 and 1:2, and its three metering ratios determine its crystal structure and performance are completely different. The three compounds are expressite AgTe, hessit Ag 2 Te and galena (stuetizite) Ag 4.53 Te 3 . AgTe and Ag ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/04
CPCC01B19/007C01P2002/72C01P2004/04C01P2004/01
Inventor 王一休杨青李凌
Owner ZHEJIANG LAB
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