Method for regulating and controlling three-dimensional graphene holes with aid of sulfur used as template

A graphene, three-dimensional porous technology, applied in the field of graphene, can solve the problems of limited size, poor thermal stability, limited range, etc., achieve the effect of mild conditions, simple operation, and control of pore size

Inactive Publication Date: 2017-06-13
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hard templates involve a complex template preparation process and require the use of some toxic reagents during template removal
However, soft templates, such as self-assembled organic molecular chains, have poor thermal stability and are easy to remove, but their size is limited. For the regulation of pores in porous carbon materials, the range is limited.

Method used

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  • Method for regulating and controlling three-dimensional graphene holes with aid of sulfur used as template
  • Method for regulating and controlling three-dimensional graphene holes with aid of sulfur used as template
  • Method for regulating and controlling three-dimensional graphene holes with aid of sulfur used as template

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Embodiment 1

[0032] This embodiment provides a method for using sulfur as a template to regulate three-dimensional graphene pores, at least including the following steps:

[0033] In the first step, take 78.5mL of 2mg / mL graphene oxide dispersion and place it in a 100mL beaker, add 0.75gNa 2 S 2 o 3 ·5H 2 0, then add 6.5mL of 1M hydrochloric acid, stir for 30min to make it fully mixed, to obtain a mixed dispersion;

[0034] In the second step, the mixed dispersion liquid obtained in the first step is added to a 100mL hydrothermal reaction kettle for hydrothermal reaction. the hydrogel;

[0035] The third step is to fully soak the hydrogel obtained in the second step in deionized water to remove impurities, and then fully dry it at 70°C for 48 hours to remove water and obtain the product to be treated;

[0036] The fourth step is to desulfurize the product to be treated obtained in the third step. Specifically, under the protection of argon, the temperature is raised to 400°C at a heat...

Embodiment 2

[0041] This embodiment provides a method for using sulfur as a template to regulate three-dimensional graphene pores, at least including the following steps:

[0042] In the first step, take 83.5mL of 2mg / mL graphene oxide dispersion and place it in a 100mL beaker, add 0.10gNa 2 S 2 o 3 ·5H 2 0, then add 1.5 mL of 1M hydrochloric acid, stir for 30 min to make it fully mixed, and obtain a mixed dispersion;

[0043] In the second step, the mixed dispersion liquid obtained in the first step is added to a 100mL hydrothermal reaction kettle for hydrothermal reaction. the hydrogel;

[0044] The third step is to fully soak the hydrogel obtained in the second step in deionized water to remove impurities, and then fully dry it at 75°C for 40 hours to remove water and obtain the product to be treated;

[0045] The fourth step is to desulfurize the product to be treated obtained in the third step. Specifically, under the protection of argon, the temperature is raised to 420°C at a h...

Embodiment 3

[0047] This embodiment provides a method for using sulfur as a template to regulate three-dimensional graphene pores, at least including the following steps:

[0048] In the first step, take 82.5mL of 1.5mg / mL graphene oxide dispersion and place it in a 100mL beaker, add 0.21gNa 2 S 2 o 3 ·5H 2 0, then add 2.5 mL of 1M hydrochloric acid, stir for 40 min to make it fully mixed, and obtain a mixed dispersion;

[0049] In the second step, the mixed dispersion liquid obtained in the first step is added to a 100mL hydrothermal reaction kettle for hydrothermal reaction. the hydrogel;

[0050] The third step is to fully soak the hydrogel obtained in the second step in deionized water to remove impurities, and then fully dry it at 85°C for 30 hours to remove water and obtain the product to be treated;

[0051] The fourth step is to desulfurize the product to be treated obtained in the third step. Specifically, under the protection of argon, the temperature is raised to 350°C at a...

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Abstract

The invention belongs to the technical field of graphene, and particularly relates to a method for regulating and controlling three-dimensional graphene holes with the aid of sulfur used as a template. The method at least includes steps of adding sulfur-containing substances and acid into graphene dispersion liquid and sufficiently stirring the sulfur-containing substances, the acid and the graphene dispersion liquid to obtain mixed dispersion liquid; adding the mixed dispersion liquid obtained at the first step into a hydrothermal reaction kettle and carrying out hydrothermal reaction; sufficiently soaking hydrogel obtained at the second step in deionized water, removing impurities and then removing water; carrying out desulfurization treatment on to-be-treated products obtained at the third step to obtain three-dimensional porous graphene macroscopic bodies. Compared with the prior art, the method has the advantages that the sulfur is led into the three-dimensional graphene macroscopic bodies as the template in hydrothermal procedures, and the pore sizes of the three-dimensional graphene macroscopic bodies can be increased after the sulfur is removed by means of simple heat treatment; the leading quantity of the sulfur is accurately controlled, accordingly, pore structures of the macroscopic bodies can be accurately regulated and controlled on a large scale, and the macroscopic bodies can be applied to different energy storage devices.

Description

technical field [0001] The invention belongs to the technical field of graphene, and in particular relates to a method for regulating three-dimensional graphene pores by using sulfur as a template. Background technique [0002] The template method is an effective method for preparing porous carbon materials, and the commonly used templates include hard templates and soft templates. Among them, the commonly used hard templates include polymer spheres such as silica, nickel foam, and PS spheres, and the soft templates include various surfactants and amphiphilic molecules. Hard templates involve a complex template preparation process, and some toxic reagents need to be used in the template removal process. However, soft templates, such as self-assembled organic molecular chains, have poor thermal stability and are easy to remove, but their size is limited. For the regulation of the pores of porous carbon materials, the range is limited. Therefore, it is of great significance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C01B32/194H01M4/587
CPCC01B2204/22C01B2204/32C01P2004/03C01P2006/10C01P2006/14H01M4/587Y02E60/10
Inventor 陶莹韩俊伟杨全红刘东海张辰游从辉
Owner TIANJIN UNIV
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