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Electrochemical gas sensing device adopting precious metal and graphene composite material as sensing electrode and production method of electrochemical gas sensing device

A gas sensor and sensing electrode technology, applied in the direction of material electrochemical variables, etc., can solve the problem that the sensing electrode of electrochemical gas sensing has not been reported.

Inactive Publication Date: 2015-04-01
JIANGXI NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] Noble metal nanoparticles and graphene composites have been widely reported as electrode materials for fuel cells, but they have not been reported as sensing electrodes for electrochemical gas sensing.

Method used

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  • Electrochemical gas sensing device adopting precious metal and graphene composite material as sensing electrode and production method of electrochemical gas sensing device
  • Electrochemical gas sensing device adopting precious metal and graphene composite material as sensing electrode and production method of electrochemical gas sensing device
  • Electrochemical gas sensing device adopting precious metal and graphene composite material as sensing electrode and production method of electrochemical gas sensing device

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Experimental program
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Embodiment Construction

[0032] The present invention is achieved like this:

[0033] Preparation of graphene oxide

[0034] Preoxidation:

[0035] 1. Combine 6 mL of concentrated sulfuric acid, 1 g of potassium persulfate and (K 2 S 2 o 8 ) 1g phosphorus pentoxide (P 2 o 5 ) into a 100 mL round bottom flask to form a suspension;

[0036] 2. Add 2 g of flake graphite, heat it to 80°C, react for 6 hours and cool to room temperature;

[0037] 3. Dilute with distilled water, filter and wash repeatedly until the filtrate is neutral, and dry under vacuum at 80°C for 12 hours to obtain pre-oxidized graphite.

[0038] Secondary oxidation:

[0039] 4. Weigh 6 g KMnO 4 Add to the solution containing 46 mL concentrated H 2 SO 4 In a 250 mL round-bottomed flask, put it in an ice bath at 0°C for 1 hour, and slowly add 2 g of pre-oxidized graphite powder during the ice bath for 15 minutes, keep stirring and make the reaction temperature not exceed 20°C;

[0040] 5. Heat the mixture to 40°C, heat ...

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Abstract

The invention relates to an electrochemical gas sensing device adopting a precious metal and graphene composite material as a sensing electrode and a production method of the electrochemical gas sensing device. The production method comprises the following steps: (1) preparing graphene oxide; (2) preparing a platinum metal nano particle and graphene composite material; (3) producing the sensing electrode in an electrochemical sensor: producing the gas sensor by adopting the platinum metal nano particle and graphene composite material as the sensing electrode of the electrochemical gas sensor. The gas sensor can detect various gases such as hydrogen and carbon oxide.

Description

technical field [0001] The invention relates to a novel electrochemical gas sensing electrode, in particular to an electrochemical gas sensing device using a noble metal and graphene composite material as a sensing electrode and a manufacturing method thereof. Background technique [0002] Due to their unique properties, nanomaterials such as carbon nanotubes and graphene have become one of the research hotspots in the world today, and have attracted more and more attention. At the beginning of this century, western developed countries successively began to increase their investment in the research and development of micro-nano technology. In 2012, the U.S. Department of Energy, Department of Defense, Department of Health and other national departments invested more than 1.8 billion U.S. dollars in the field of nanomaterials. In recent years, my country has also established a number of nanometer research centers. Due to their high specific surface area and small size effect...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/26
Inventor 顾刚莫恃标任宇飞邵辉柏曾凡焱
Owner JIANGXI NORMAL UNIVERSITY
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