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Preparation method and applications of Ag/TiO2-supported nitrogen-doped three-dimensional graphene aerogel

A technology of graphene airgel and titanium dioxide, which is applied in the direction of airgel preparation, graphene, chemical instruments and methods, etc., to achieve the effect of thrombin detection and response improvement

Inactive Publication Date: 2018-03-02
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as far as we know, no Ag-TiO 2 / Azagraphene hydrogel (3DNGH) applied to the field of PEC sensing

Method used

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  • Preparation method and applications of Ag/TiO2-supported nitrogen-doped three-dimensional graphene aerogel

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Effect test

Embodiment 1

[0032] 1) Preparation of graphene oxide (GO)

[0033] First, natural flake graphite powder and potassium nitrate are added to concentrated sulfuric acid in a mass ratio (2:1) and cooled to about 0°C.

[0034] Wherein, the add-on of concentrated sulfuric acid is according to natural flake graphite powder: the ratio of concentrated sulfuric acid=1.0 (g):50.0 (mL); The add-on of potassium permanganate is added according to mass ratio potassium permanganate: natural flake graphite powder=6 The reaction system was reacted for 3-4 hours (in ice bath at 0°C); then in an oil bath at 30°C for 1 hour, the reactant was muddy; then the above reactant was stirred in an ice-water bath for 5 minutes, and then double distilled water was added 100mL; then stirred at 70°C for 3 hours, the reactant was brownish-yellow mud; finally, 300mL hydrogen peroxide (5%) was first slowly and then quickly added to the reaction system to react for 5-30min. Afterwards, 500 mL of concentrated hydrochloric aci...

Embodiment 2

[0042] 1) Preparation of graphene oxide (GO)

[0043] First, natural flake graphite powder and potassium nitrate are added to concentrated sulfuric acid in a mass ratio (2:1) and cooled to about 0°C.

[0044] Wherein, the add-on of concentrated sulfuric acid is according to natural flake graphite powder: the ratio of concentrated sulfuric acid=1.0 (g):50.0 (mL); The add-on of potassium permanganate is added according to mass ratio potassium permanganate: natural flake graphite powder=6 The reaction system was reacted for 3-4 hours (in ice bath at 0°C); then in an oil bath at 30°C for 1 hour, the reactant was muddy; then the above reactant was stirred in an ice-water bath for 5 minutes, and then double distilled water was added 100mL; then stirred at 70°C for 3 hours, the reactant was brownish-yellow mud; finally, 300mL hydrogen peroxide (5%) was first slowly and then quickly added to the reaction system to react for 5-30min. Afterwards, 500 mL of concentrated hydrochloric aci...

Embodiment 3

[0052] 1) Preparation of graphene oxide (GO)

[0053] First, natural flake graphite powder and potassium nitrate are added to concentrated sulfuric acid in a mass ratio (2:1) and cooled to about 0°C.

[0054] Wherein, the add-on of concentrated sulfuric acid is according to natural flake graphite powder: the ratio of concentrated sulfuric acid=1.0 (g):50.0 (mL); The add-on of potassium permanganate is added according to mass ratio potassium permanganate: natural flake graphite powder=6 The reaction system was reacted for 3-4 hours (in ice bath at 0°C); then in an oil bath at 30°C for 1 hour, the reactant was muddy; then the above reactant was stirred in an ice-water bath for 5 minutes, and then double distilled water was added 100mL; then stirred at 70°C for 3 hours, the reactant was brownish-yellow mud; finally, 300mL hydrogen peroxide (5%) was first slowly and then quickly added to the reaction system to react for 5-30min. Afterwards, 500 mL of concentrated hydrochloric aci...

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Abstract

The invention provides a preparation method and applications of Ag / TiO2-supported nitrogen-doped three-dimensional graphene aerogel, wherein the preparation method includes the steps of: 1) dispersinggraphene oxide in deionized water, homogenizing the liquid by ultrasonic treatment, and adding glycine, silver nitrate and titanium sulfate to prepare a dispersion liquid; 2) moving the dispersion liquid into a stainless steel high pressure reaction kettle, and firing the reaction kettle; 3) after the firing, cooling the reaction kettle to room temperature, and collecting and cleaning a producedsolid sample; 4) freeze-drying the sample for 2 days to obtain the finish product of the Ag / TiO2-supported nitrogen-doped three-dimensional graphene aerogel. In the method, the Ag / TiO2-supported nitrogen-doped three-dimensional graphene aerogel is produced via a one step process. The product can overcome defects and improve performances of the graphene, and is greatly improved in response to photoelectro-chemistry. The photoelectro-chemistry biosensor can be used for sensitivity and effectively detecting thrombin.

Description

technical field [0001] The invention relates to a simple and effective method for preparing silver-titanium dioxide-loaded aza three-dimensional graphene airgel, which belongs to the field of preparation of electrochemical functional nanometer materials. Background technique [0002] Photoelectric sensing (PEC) is a new type of analysis technology with wide application value. PEC is to use the linear relationship between the photocurrent of photoelectrochemically active substances and the physical and chemical interactions between the detected substances to establish a sensitive sensing device. PEC has attracted attention because of its high sensitivity, easy operation, high precision, and low cost. Exploring and developing new high-efficiency optoelectronic materials is crucial in optoelectronic sensing research. TiO 2 As a traditional semiconductor, it has been widely used by researchers due to its excellent properties such as non-toxicity, high stability, and biocompat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/327G01N27/26B01J13/00C01B32/184
CPCG01N27/3275B01J13/0091C01P2002/72C01P2002/82C01P2004/03C01P2004/04G01N27/26
Inventor 张盈王坤郝楠陈赛博
Owner JIANGSU UNIV
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