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A kind of preparation method of graphene and tin oxide hollow sphere composite nanomaterial

A technology of composite nanomaterials and hollow spheres, applied in the direction of graphene, tin oxide, nano-carbon, etc., can solve the problems of cumbersome preparation process and weak third-order nonlinear optical response, and achieve simple steps, strong nonlinear optical properties, The effect of promoting crystallization

Active Publication Date: 2022-03-29
HENAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the G / SnO in the prior art 2 The preparation process of hollow sphere composite materials is cumbersome, and its third-order nonlinear optical response is weak. The present invention provides a new preparation method of graphene and tin oxide hollow sphere composite nanomaterials.

Method used

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  • A kind of preparation method of graphene and tin oxide hollow sphere composite nanomaterial
  • A kind of preparation method of graphene and tin oxide hollow sphere composite nanomaterial
  • A kind of preparation method of graphene and tin oxide hollow sphere composite nanomaterial

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Embodiment 1

[0029] Take 0.182gK 2 SnO 3 ·3H 2 Put O into a beaker, add 35 mL of deionized water, and stir magnetically for 20 minutes to obtain an aqueous solution of potassium sulfate; put 0.24 g of urea into another beaker, add 5 mL of ethanol, and stir magnetically for 20 minutes to obtain a urea solution. Add the potassium sulfate aqueous solution to the urea solution, and ultrasonically treat it for 30 minutes to form a mixed solution;

[0030] Put 0.124mg of graphene oxide in a beaker, add 10mL of deionized water, stir magnetically for 20min, then add the mixed solution prepared above, and put it on a magnetic stirrer and stir continuously for 20min to obtain an intermediate solution;

[0031] Transfer the intermediate solution to a high-pressure stainless steel reactor lined with polytetrafluoroethylene, and put it in a vacuum oven at 190°C for 15 hours;

[0032] After the reaction, put the autoclave into ice water to quench quickly, wash the cooled reaction solution with deioni...

Embodiment 2

[0035] Take 0.182gK 2 SnO 3 ·3H 2 Put O into a beaker, add 30 mL of deionized water, and stir magnetically for 20 minutes to obtain an aqueous solution of potassium sulfate; put 0.24 g of urea into another beaker, add 10 mL of ethanol, and stir magnetically for 20 minutes to obtain a urea solution. Add the potassium sulfate aqueous solution to the urea solution, and ultrasonically treat it for 30 minutes to form a mixed solution;

[0036] Put 0.124mg of graphene oxide in a beaker, add 10mL of deionized water, stir magnetically for 20min, then add the mixed solution prepared above, and put it on a magnetic stirrer and stir continuously for 20min to obtain an intermediate solution;

[0037] Transfer the intermediate solution to a high-pressure stainless steel reactor lined with polytetrafluoroethylene, and put it in a vacuum oven at 190°C for 15 hours;

[0038] After the reaction, put the autoclave into ice water to quench quickly, wash the cooled reaction solution with deion...

Embodiment 3

[0041] Take 0.182gK 2 SnO 3·3H 2 Put O into a beaker, add 25 mL of deionized water, and stir magnetically for 20 minutes to obtain an aqueous solution of potassium sulfate; put 0.24 g of urea into another beaker, add 15 mL of ethanol, and stir magnetically for 20 minutes to obtain a urea solution. Add the potassium sulfate aqueous solution to the urea solution, and ultrasonically treat it for 30 minutes to form a mixed solution;

[0042] Put 0.124mg of graphene oxide in a beaker, add 10mL of deionized water, stir magnetically for 20min, then add the mixed solution prepared above, and put it on a magnetic stirrer and stir continuously for 20min to obtain an intermediate solution;

[0043] Transfer the intermediate solution to a high-pressure stainless steel reactor lined with polytetrafluoroethylene, and put it in a vacuum oven at 190°C for 15 hours;

[0044] After the reaction, put the autoclave into ice water to quench quickly, wash the cooled reaction solution with deioni...

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Abstract

The invention belongs to the technical field of semiconductor materials, and in particular relates to a method for preparing a composite nanomaterial of graphene and tin oxide hollow spheres. The steps include: 2 SnO 3 ·3H 2 Add deionized water to O, mix urea with ethanol solution, combine potassium sulfate aqueous solution and urea solution with ultrasonic treatment to form a mixed solution; disperse graphene oxide in water, add mixed solution and stir evenly, and then transfer to polytetrafluoroethylene as In the lined high-pressure stainless steel reaction kettle, put it into a vacuum drying oven for reaction; after the reaction, quickly put the high-pressure reaction kettle into ice water to quench, and wash the cooled liquid with deionized water and absolute ethanol respectively, and then vacuum dry , that is, G / SnO2 hollow sphere composite nanomaterials. The synthesized G / SnO of the present invention 2 The third-order nonlinear absorption of hollow sphere composite nanomaterials is saturated absorption, and the third-order nonlinear refraction is self-focusing, which is expected to be applied to membrane-locked pulsed lasers, optical memories, and optical modulators.

Description

technical field [0001] The invention belongs to the technical field of semiconductor materials, and in particular relates to a preparation method of graphene and tin oxide hollow sphere composite nanomaterials. Background technique [0002] SnO 2 It is an n-type wide bandgap (3.6eV) semiconductor material, widely used in solar cells, sensors, nonlinear optoelectronic devices and other fields. Nanoscale SnO 2 The low density, high specific surface area, and good permeability of hollow spheres have greatly improved their electrochemical activity, nonlinear optical properties, etc., and have attracted widespread attention. [0003] Although SnO 2 The nonlinear optical properties of hollow spheres are greater than those of bulk tin oxide, but they cannot meet the needs of nonlinear optics. Therefore, with the emergence of graphene and its excellent optoelectronic properties, scientists began to combine graphene with SnO 2 compound to enhance the nonlinear optical properties ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G19/02C01B32/184B82Y40/00B82Y30/00
CPCC01G19/02C01B32/184B82Y40/00B82Y30/00C01P2004/80C01P2004/34C01P2004/03
Inventor 朱宝华王芳芳吴嘉文顾玉宗
Owner HENAN UNIVERSITY
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