Method for preparing graphene material and cogenerating hydrogen

A graphene and hydrogen technology, applied in nanotechnology, electrolysis process, electrolysis components, etc., to achieve the effect of low cost, high output and simple operation

Inactive Publication Date: 2017-03-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing methods have their own disadvantages

Method used

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  • Method for preparing graphene material and cogenerating hydrogen
  • Method for preparing graphene material and cogenerating hydrogen
  • Method for preparing graphene material and cogenerating hydrogen

Examples

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Embodiment 1

[0026] A method for preparing graphene material co-production hydrogen, comprising the following steps:

[0027] (1) flake graphite is pressed into sheets in a sheeting abrasive to make electrodes with a thickness of 2mm, the pressure is 15Mpa, and the pressurization time is 10min;

[0028] (2) Do positive pole with graphite electrode, platinum electrode with negative pole and electrolyze in electrolyte; Wherein electrolyte is the mixed solution of 98% concentrated sulfuric acid and deionized water, the pH=1~3 of mixed solution; During electrolysis, electrode distance 3cm, First add a voltage of 1V for 30min to make SO 4 2- Fully insert the graphite sheet, and then use 5V constant voltage electrolysis;

[0029] (3) During electrolysis, the platinum electrode generates hydrogen gas, the graphite on the graphite electrode peels off quickly, and the electrolyte is in a black and turbid state; use a filter membrane to filter the electrolyte and wash the residual SO with deionize...

Embodiment 2

[0033] A method for preparing graphene material co-production hydrogen, comprising the following steps:

[0034] (1) Expanded graphite is pressed into sheets in a sheeting abrasive to make electrodes with a thickness of 2mm, the pressure is 30Mpa, and the pressurization time is 15min;

[0035] (2) Do positive pole with graphite electrode and platinum electrode as negative pole and electrolyze in electrolyte; Wherein electrolyte is the mixed solution of 98% concentrated sulfuric acid and deionized water, the pH=1~3 of mixed solution; During electrolysis, the electrode spacing is 4cm, First add a voltage of 2V for 30min to make SO 4 2- Fully insert the graphite sheet, and then use 10V constant voltage electrolysis;

[0036] (3) During electrolysis, the platinum electrode generates hydrogen gas, the graphite on the graphite electrode peels off quickly, and the electrolyte is in a black and turbid state; use a filter membrane to filter the electrolyte and wash the residual SO wi...

Embodiment 3

[0040] A method for preparing graphene material co-production hydrogen, comprising the following steps:

[0041] (1) flake graphite is pressed into sheets in a sheeting abrasive to make electrodes with a thickness of 2mm, the pressure is 25Mpa, and the pressurization time is 20min;

[0042] (2) Do positive pole with graphite electrode and platinum electrode as negative pole and electrolyze in electrolyte; Wherein electrolyte is the mixed solution of 98% concentrated sulfuric acid and deionized water, the pH=1~3 of mixed solution; During electrolysis, electrode distance 2cm, First add a voltage of 2V for 30min to make SO 4 2- Fully insert the graphite sheet, and then use 6.5V constant voltage electrolysis;

[0043](3) During electrolysis, the platinum electrode generates hydrogen gas, the graphite on the graphite electrode peels off quickly, and the electrolyte is in a black and turbid state; use a filter membrane to filter the electrolyte and use deionized water to wash away...

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Abstract

The invention provides a method for preparing a graphene material and cogenerating hydrogen. The method includes the steps that graphite is tableted in a tableting mold to be made into an electrode, the graphite electrode is used as the positive electrode, and a platinum electrode is used as the negative electrode to achieve electrolysis in an electrolyte solution; the electrolyte solution is a mixed solution of 98% concentrated sulfuric acid and deionized water, the platinum electrode can generate hydrogen in the electrolysis process, graphite on the graphite electrode can peel off quickly, and the electrolyte solution is in a black muddy state; a filter membrane is used for suction filtration of the electrolyte solution and the deionized water is also used for washing away residual SO4<2->; a black solid obtained after suction filtration is collected, a dispersing agent is used for performing ultrasonic treatment for 0.5-1h, and centrifugal treatment is performed for 5-10min; then supernatant liquid is collected, and accordingly graphene can be obtained. By the adoption of the method, the electrolytic method is utilized for preparing graphene and cogenerating hydrogen, operation is easy and cost is low; and hydrogen can be generated while graphene is prepared, and the hydrogen output rate is about 5-25ml/min.

Description

technical field [0001] The invention belongs to the field of novel nanometer materials, in particular to a method for preparing graphene materials to co-produce hydrogen. Background technique [0002] Graphene exhibits many excellent physical and chemical properties. For example, the strength of graphene is the highest among the tested materials, reaching 130GPa, which is more than 100 times that of steel; its carrier mobility is 1.5x 10 4 cm2·V -1 ·S -1 , which is twice that of the currently known indium antimonide material with the highest mobility, and more than 10 times the mobility of commercial silicon wafers; the thermal conductivity of graphene can reach 5x10 3 W·m -1 ·K -1 , is three times that of diamond; in addition, graphene also has special properties such as room temperature quantum Hall effect and room temperature ferromagnetism. How to quickly and efficiently prepare high-quality graphene and facilitate its application is the key direction for people to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00C25B1/02B82Y40/00
CPCC25B1/00B82Y40/00C25B1/02
Inventor 吴孟强宋尧琛陈诚廖家轩徐天佑
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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