Preparation method and application of thia-graphene/gamma-Fe2O3 nano composite material

A technology of nanocomposite materials and graphene, applied in chemical instruments and methods, analyzing materials through chemical reactions, and analyzing materials through observation of the impact on chemical indicators, can solve problems such as identification and achieve simple processes , easy to operate, large specific surface area effect

Active Publication Date: 2015-09-16
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These traditional detection methods each have their own scope and accuracy, and are also affected by cost, but these methods cannot be intuitively recognized by the naked eye

Method used

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  • Preparation method and application of thia-graphene/gamma-Fe2O3 nano composite material
  • Preparation method and application of thia-graphene/gamma-Fe2O3 nano composite material
  • Preparation method and application of thia-graphene/gamma-Fe2O3 nano composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0031] The graphene oxide used in embodiment 2, embodiment 3 is prepared by the following method:

[0032] GO was prepared by the improved Hummers method: 1 g of natural flake graphite was added to 50 mL of concentrated H 2 S 2 o 4 (98%), cool to zero; slowly add 0.5g KNO 3 and 6g KMnO 4 . React for 4 hours under the condition that the reaction temperature is controlled not to exceed 10°C. Then the system was transferred to a constant temperature water bath at 35° C. for stirring for 2 h, 300 mL of deionized water was added, and the reaction was continued for 2 h at ≤80° C. With an excess of 5% H 2 o 2 Reduction of remaining KMnO 4 , and washed several times with 5% HCl, and finally fully washed with enough deionized water until the solution no longer contained SO 4 2- Ions (BaCl 2 No white precipitate was detected). The final product was transferred to a 65°C oven for drying and stored for future use.

Embodiment 1

[0034] Weigh 80mg Fe 2 (SO 4 ) 3 Put it into a sealed quartz tube filled with Ar, put the sealed quartz tube into a tubular heating furnace, raise the temperature to 650 °C at a rate of 10 °C / min, and keep it for 2 hours, cool it down to room temperature naturally, take out the calcined product, and finally obtain nanomaterials α-Fe 2 o 3 .

[0035] The sample prepared in this example is used for microfluidic technology to detect lactic acid by colorimetry, and the steps are as follows:

[0036] (1) Prepare solution and dispersion, prepare 100 μL alcohol solution containing 0.5 mg TMB; configure 100 μL phosphate buffer solution (PBS, 10 mM, pH 7.4) containing 0.5 unit lactate oxidase; configure 5×10 –4 、10 –3 , 0.05, 0.01, 0.1, 1, 10 μmol lactic acid in phosphate buffer solution (PBS, 10mM, pH 7.4) each 100μL; configure 200μL 0.2M acetate buffer solution (ABS, pH 4.0); configure 2mg / mL α-Fe 2 o 3 water dispersion;

[0037] (2) 200 μL of the α-Fe was passed through the...

Embodiment 3

[0048] Weigh 10 mg of solid graphene oxide and dissolve it in 20 mL of water to prepare a 0.5 mg / mL graphene oxide aqueous solution. Weigh 4mg Fe 2 (SO 4 ) 3 Join in above-mentioned graphene oxide solution, obtain graphene oxide / Fe 2 (SO 4 ) 3 mixture. Graphene oxide / Fe 2 (SO 4 ) 3 The mixed solution was continuously ultrasonicated for 30 minutes and then transferred to 60°C for 12 hours to obtain graphene oxide / Fe 2 (SO 4 ) 3 solid mixture. The above graphene oxide / Fe 2 (SO 4 ) 3 The solid mixture is filled with N 2 Put the stainless steel sealed tube into a tube-type heating furnace, raise the temperature to 480 °C at 3 °C / min, and keep it for 2 hours, cool to room temperature naturally, take out the calcined product, and finally get the nanocomposite S / G / γ-Fe 2 o 3 .

[0049] The sample prepared in this example was used in microfluidic technology to detect lactic acid by colorimetry, and the steps were the same as in Example 2.

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Abstract

The invention relates to the field of graphene materials, and particularly relates to a preparation method and application of a thia-graphene/gamma-Fe2O3 nano composite material. A prepared thia-graphene/ gamma-Fe2O3 nano composite material can be applied to the field of detection by a colorimetric method, and especially can be applied to the lactic acid detection by a colorimetric method via a microfluidic technique. The method for preparing thia-graphene/gamma-Fe2O3 can be used for obtaining gamma-Fe2O3 existing stably at the temperature of 650 DEG C. The obtained material thia-graphene/gamma-Fe2O3 can be widely applied to the fields of photoelectric chemical sensing, catalysis and battery materials. The obtained material thia-graphene/gamma-Fe2O3 can be applied to the flexible lactic acid detection by the colorimetric method via the microfluidic technique; the use amount of lactic acid and lactic acid oxidase is reduced by the microfluidic technique; meanwhile, the thia-graphene/gamma-Fe2O3 nano composite material is also reduced, and also can play a very good catalytic effect.

Description

technical field [0001] The invention relates to the field of graphene materials, in particular to a kind of thia graphene γ-Fe 2 o 3 The preparation method of nanocomposite material and its application, the thia graphene / γ-Fe that the present invention prepares 2 o 3 The nanocomposite material can be applied to the field of colorimetric detection, especially can be applied to microfluidic technology to detect lactic acid by colorimetry. Background technique [0002] Among carbon materials, graphene is composed of sp 2 An ultra-thin two-dimensional network structure composed of hybrid carbon atoms, as a carbon material with a two-dimensional honeycomb lattice structure densely arranged by a single layer of carbon atoms, graphene has good electrical conductivity, large specific surface area and fast electron transfer rate, etc. advantage. N, B and other elements are easily doped into graphene, but compared with B and N, S doping is very special, the S atomic radius is muc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/02G01N21/78
Inventor 毛罕平严玉婷
Owner JIANGSU UNIV
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