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Method for preparing flexible paper-like graphite oxide and application of flexible paper-like graphite oxide

A graphite and paper-like technology, which is applied in the preparation of flexible paper-like graphite oxide and the application field of detecting rhodamine 6G, can solve the problems of complex process and high cost, and achieve simple process, low cost and sensitive detection effect Effect

Inactive Publication Date: 2015-06-10
ANHUI UNIVERSITY
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Problems solved by technology

At present, the preparation methods of graphene / graphene oxide include mechanical exfoliation method, CVD method, chemical method, etc., but the above methods are limited by their high cost or complicated process, so they cannot fully meet the actual needs

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  • Method for preparing flexible paper-like graphite oxide and application of flexible paper-like graphite oxide
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  • Method for preparing flexible paper-like graphite oxide and application of flexible paper-like graphite oxide

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Embodiment Construction

[0022] In order to facilitate the understanding of those skilled in the art, the following Figure 1-4 And embodiment design of the present invention is described further. Meanwhile, various raw materials involved in the instructions are all purchased from the market.

[0023] (1) Preparation of graphite oxide:

[0024] Prepare a mixed acid of 180mL concentrated sulfuric acid (mass fraction 98%) and 20mL concentrated phosphoric acid (mass fraction 85%), then pour the mixed acid slowly along the beaker wall into 1.500g flake graphite (200 mesh) and thoroughly clean in a dry 500mL beaker; then place the reactants in an oil bath that has been preheated to 50°C, and start adding 9.000g KMnO slowly 4 ; After adding KmnO 4 Finally, after allowing the reaction system to continue to react for 6h, the mass fraction after adding dilution was 10% H 2 o 2 , until the color of the solution changed from black to bright yellow, and after continuing to react for 3 hours, the reaction sys...

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Abstract

The invention relates to the field of SERS detection and in particular relates to a method for preparing flexible paper-like graphite oxide and an application of the flexible paper-like graphite oxide in the aspect of detecting rhodamine 6G. The method for preparing the flexible paper-like graphite oxide comprises the following steps: preparing graphite oxide; diluting the graphite oxide to 4mg / mL, taking 30ml of the diluted graphite oxide, performing vacuum filtration, and forming a graphite oxide film on a nylon microfiltration membrane; and drying at the temperature of 60 DEG C for 10 hours. The preparation method disclosed by the invention has the advantages that the process is simple, the cost is low, various shapes can be easily prepared and the like; and the prepared flexible pape-like graphite oxide has an obvious Raman enhancement effect. The rhodamine 6G detection experiment proves that the detection limit of the rhodamine concentration is 10<-8>mol / L, and compared with that of the other SERS substrates, the detection limit is obviously improved. Therefore, the flexible paper-like graphite oxide SERS substrate prepared by the method can be widely applied to the field of detection of rhodamine 6G and has good development prospects.

Description

technical field [0001] The invention relates to the field of SERS detection, in particular to a preparation method of flexible paper-like graphite oxide and its application in detecting Rhodamine 6G. Background technique [0002] Surface-enhanced Raman technique (SERS) is a powerful means to study chemical structures, with the advantages of good selectivity and high sensitivity. SERS can enhance the signal of trace substances, even realize the detection of single molecules, and can distinguish isomers and identify Adsorption orientation of molecules on a surface. The preparation of SERS substrates with high sensitivity, good repeatability and stable performance has always been one of the most important research goals in this field. [0003] Graphene / graphene oxide has been proven to have a wide range of applications, and its surface-enhanced Raman substrate is another recent discovery with great practical applications. The surface structure of graphene / graphene oxide is ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 吴明在刘涛张利利于欣欣白志满
Owner ANHUI UNIVERSITY
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