Method for preparing graphene nano-material electrochemical sensor by atomic layer deposition process

A technique of atomic layer deposition and material electrochemistry, applied in the direction of material electrochemical variables, gaseous chemical plating, metal material coating technology, etc., can solve problems such as expensive instruments and complex operations, and achieve low cost, simple process, The effect of keeping the cost low

Active Publication Date: 2013-07-17
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

currently reported pb 2+ Ion determination includes inductively coupled plasma atomic emission method, flow injection flame atomic absorption method, graphite furnace atomic absorption spectrometry, mass spectrometry, etc., but most of these methods involve expensive instruments and complicated operations

Method used

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  • Method for preparing graphene nano-material electrochemical sensor by atomic layer deposition process
  • Method for preparing graphene nano-material electrochemical sensor by atomic layer deposition process
  • Method for preparing graphene nano-material electrochemical sensor by atomic layer deposition process

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Graphite oxides were synthesized from graphite powder according to Hummer's method. The specific steps are: weigh a certain amount of graphite powder, and add an appropriate amount of K 2 S 2 o 8 ,P 2 o 5 and concentrated sulfuric acid, heated at 80 °C for 4.5 h. The mixture was then cooled to room temperature, diluted with deionized water and left overnight, washed to remove unreacted acid, and dried to obtain pre-oxidized graphite. Then put the pre-oxidized graphite into sulfuric acid, add KMnO 4 Stir, dilute with deionized water, stir and add deionized water. Then a certain concentration and a certain amount of H 2 o 2 Added to the above mixture, it can be seen that the color of the solution has become bright yellow. The resulting mixture was then filtered and washed with hydrochloric acid and deionized water to remove metal ions and residual acid, respectively. Dry to obtain graphite oxide. Then it is formulated into a solution and peeled off under the ac...

Embodiment 2

[0031] Graphite oxides were synthesized from graphite powder according to Hummer's method. The specific steps are: weigh a certain amount of graphite powder, and add an appropriate amount of K 2 S 2 o 8 ,P 2 o 5 and concentrated sulfuric acid, heated at 80 °C for 4.5 h. The mixture was then cooled to room temperature, diluted with deionized water and left overnight, washed to remove unreacted acid, and dried to obtain pre-oxidized graphite. Then put the pre-oxidized graphite into sulfuric acid, add KMnO 4 Stir, dilute with deionized water, stir and add deionized water. Then a certain concentration and a certain amount of H 2 o 2 Added to the above mixture, it can be seen that the color of the solution has become bright yellow. The resulting mixture was then filtered and washed with hydrochloric acid and deionized water to remove metal ions and residual acid, respectively. Dry to obtain graphite oxide. Then it is formulated into a solution and peeled off under the ac...

Embodiment 3

[0035] Graphite oxides were synthesized from graphite powder according to Hummer's method. The specific steps are: weigh a certain amount of graphite powder, and add an appropriate amount of K 2 S 2 o 8 ,P 2 o 5 and concentrated sulfuric acid, heated at 80 °C for 4.5 h. The mixture was then cooled to room temperature, diluted with deionized water and left overnight, washed to remove unreacted acid, and dried to obtain pre-oxidized graphite. Then put the pre-oxidized graphite into sulfuric acid, add KMnO 4 Stir, dilute with deionized water, stir and add deionized water. Then a certain concentration and a certain amount of H 2 o 2 Added to the above mixture, it can be seen that the color of the solution has become bright yellow. The resulting mixture was then filtered and washed with hydrochloric acid and deionized water to remove metal ions and residual acid, respectively. Dry to obtain graphite oxide. Then it is formulated into a solution and peeled off under the ac...

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Abstract

The invention relates to a method for preparing a graphene nano-material electrochemical sensor by an atomic layer deposition process. The method comprises the following steps of: placing a hydrophilic graphene oxide into a reaction cavity of an atomic layer deposition device to perform deposition of a TiO2 protective film, reducing a TiO2 nano-coated graphene oxide product to obtain a TiO2/graphene composite material, preparing TiO2/Nafion into a mixed solution, dripping and coating the mixed solution on the surface of a glass carbon electrode, and drying under an infrared lamp to obtain the electrochemical sensor of the glass carbon electrode. The electrochemical sensor prepared by the method disclosed by the invention has the advantages of low cost, simplicity and convenience in operation and high sensitivity.

Description

technical field [0001] The invention belongs to an electrochemical sensor, in particular to a TiO sensor prepared by atomic layer deposition technology 2 A method for nano-coating graphene material electrochemical sensors. Background technique [0002] Graphene is a recently discovered carbon nanomaterial with a two-dimensional planar structure. Its special monoatomic layer structure makes it have many unique physical and chemical properties. The basic and applied research on graphene has become the current frontier and hot spot one of the subjects. Graphene is made of carbon atoms with sp 2 The monoatomic layer of hybrid connection is easy to aggregate. In order to improve its forming processability and give full play to its excellent properties, graphene must be effectively functionalized. In addition, graphene can also be endowed with new functions by introducing specific functional groups. Nano-TiO 2 Due to the obvious surface effect, size effect, quantum effect and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26G01N27/30C23C16/44C23C16/455C23C16/40
Inventor 覃勇张红芳王桂振郭玉晶董川
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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