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Two-dimensional same-main-group binary heterojunction and preparation method thereof

A technology of heterojunction and main group elements, which is applied to two-dimensional nanomaterials and their application fields, can solve the problems of lack of application of two-dimensional same-main group binary heterojunctions, complicated structure preparation process, etc., and achieves consistent detection effect, The effect of low experimental conditions and stable yield

Inactive Publication Date: 2020-12-11
SHENZHEN UNIV
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Problems solved by technology

However, based on the complexity of the structure of the two-dimensional homogeneous binary heterojunction itself and the complexity of the preparation process, a binary heterojunction based on the two-dimensional homogeneous group has not been developed in the prior art. For two-dimensional The application of binary heterojunctions of the same main group is also relatively lacking

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  • Two-dimensional same-main-group binary heterojunction and preparation method thereof
  • Two-dimensional same-main-group binary heterojunction and preparation method thereof
  • Two-dimensional same-main-group binary heterojunction and preparation method thereof

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[0058] In a second aspect, the present invention provides a method for preparing a two-dimensional homogeneous binary heterojunction, comprising the following steps:

[0059] Provide B powder and dissolve B powder in ammonia water to prepare B powder-ammonia solution;

[0060] Provide a two-dimensional A nanosheet material and dissolve the two-dimensional A rice sheet material in ultrapure water to prepare a two-dimensional A nanosheet solution;

[0061] Add B powder-ammonia solution dropwise to the two-dimensional A nanosheet solution, transfer the mixed solution to 30-50°C and stir for 1-12 hours, then transfer the mixed solution to 70-90°C for 1-12 hours, and collect the precipitate , washed and dried to obtain a two-dimensional homogeneous binary heterojunction;

[0062] Wherein, A and B are elements of the same main group, and both A and B are one of the main group IV, V main group or VI main group elements.

[0063] Preferably, both A and B are one of the main group IV...

Embodiment 1

[0101] A preparation method of two-dimensional tellurium nanosheets comprises the following steps:

[0102] Step 1: Sodium tellurite (Na 2 TeO 3 ) and polyvinylpyrrolidone (PVP) were dissolved and dispersed in 10 mL of deionized water at a mass ratio of 1:1.

[0103] Step 2: Then add ammonia (NH 3 ·H 2 O) and hydrazine hydrate (N 2 h 4 ·H 2 O) Add to the step 1 solution at a volume ratio of 1:1 and keep stirring for 10 minutes.

[0104] Step 3: Pour the solution obtained in Step 2 into a hydrothermal reaction kettle, place it in a blast drying oven and react at 130°C for 24 hours.

[0105] Step 4: The silver-gray precipitate with metallic luster obtained from the reaction was washed with deionized water, ethanol and acetone respectively, and centrifuged at 8,000 rpm. The supernatant was removed carefully, and the precipitate was placed in a vacuum oven at 60 °C overnight to obtain a two-dimensional tellurium nanosheet material.

[0106] A synthesis method of a Te@Se h...

Embodiment 2

[0115] A preparation method of two-dimensional tellurium nanosheets comprises the following steps:

[0116] Step 1: Sodium tellurite (Na 2 TeO 3 ) and polyvinylpyrrolidone (PVP) were dissolved and dispersed in 10 mL of deionized water at a mass ratio of 1:20.

[0117] Step 2: Then add ammonia (NH 3 ·H 2 O) and hydrazine hydrate (N 2 h 4 ·H 2 O) Add to the step 1 solution at a volume ratio of 5:1 and keep stirring for 30 minutes.

[0118] Step 3: Pour the solution obtained in Step 2 into a hydrothermal reaction kettle, place it in a blast drying oven and react at 200°C for 4 hours.

[0119] Step 4: Wash the silver-gray precipitate with metallic luster with deionized water, ethanol and acetone respectively, and centrifuge at 10,000 rpm. The supernatant was removed carefully, and the precipitate was placed in a vacuum oven at 80 °C overnight to obtain a two-dimensional tellurium nanosheet material.

[0120] A synthesis method of a Te@Se heterojunction comprises the follo...

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Abstract

The invention provides a two-dimensional same-main-group binary heterojunction, and the heterojunction comprises a two-dimensional A nanosheet material and a B nanomaterial wrapping the two-dimensional A nanosheet material, wherein A and B are the same main group elements, and A and B are one of IV main group elements, V main group elements or VI main group elements. The two-dimensional same-main-group binary heterojunction can realize different photoelectric responses for optical signals with different wavelengths under the same pH condition, and can also generate different photoelectric responses under the same optical signal irradiation under different pH conditions. Based on the fact that the two-dimensional same-main-group binary heterojunction generates different responses to different pH values and optical wavelengths, a photoelectric detector and a pH detector can be applied to achieve optical signal detection and pH value detection. The invention further provides a preparationmethod of the two-dimensional same-main-group binary heterojunction.

Description

technical field [0001] The present invention relates to two-dimensional nanomaterials and their application fields, in particular to a two-dimensional homogeneous binary heterojunction nanomaterial, and the invention also relates to a preparation method for a two-dimensional homogeneous binary heterojunction Background technique [0002] In the past two decades, breakthrough discoveries of two-dimensional (2D) materials including hexagonal boron nitride (h-BN), graphene, transition metal disulfide (TMD), and a series of single-element 2D materials have given rise to the global Great interest in world studies. Among them, 2D single-element materials of groups IV-VI have become promising materials due to their excellent electronic and photonic properties. However, at present, 2D single-element materials are facing many key problems that need to be solved urgently, such as the large-scale preparation of materials and the environmental stability of materials. At the same time,...

Claims

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Application Information

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IPC IPC(8): H01L31/109H01L31/0272H01L31/18G01N27/447G01N27/30B82Y40/00B82Y30/00B82Y15/00
CPCH01L31/109H01L31/0272H01L31/18G01N27/302G01N27/305G01N27/44726B82Y15/00B82Y30/00B82Y40/00Y02P70/50
Inventor 张晗张也
Owner SHENZHEN UNIV
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