Nitrogen-doped three-dimensional graphene loaded carbon coated copper substrate material and preparation method

A base material, graphene technology, applied in the direction of analysis of materials, material excitation analysis, material analysis by optical means, etc., to achieve the effect of easy operation, simple process, and convenient mass production.

Active Publication Date: 2015-11-18
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no relevant report on the preparation method of nitrogen-doped three-dimensional graphene-supported carbon-coated copper nanomaterials.

Method used

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  • Nitrogen-doped three-dimensional graphene loaded carbon coated copper substrate material and preparation method
  • Nitrogen-doped three-dimensional graphene loaded carbon coated copper substrate material and preparation method
  • Nitrogen-doped three-dimensional graphene loaded carbon coated copper substrate material and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Mix 2.000g of powdered copper nitrate trihydrate as a copper source, 0.829g of carbon source glucose, and 32.300g of sodium chloride, dissolve in 107mL of deionized water, and stir evenly with a magnetic force; add drop by drop under stirring 9mL of 2mg / mL nitrogen source urea solution (so that the carbon-nitrogen atomic ratio is 98:2), the dropping speed is 1 drop / second, to obtain a uniform and transparent precursor solution; put the mixed solution in the refrigerator and freeze it at -20°C After 12 hours, a solid mixed sample was obtained, and then placed in a freeze dryer for 25 hours at a cold well temperature of -43°C for 25 hours, dehydrated to obtain a gel-like solid, ground and sieved to obtain a mixed powder precursor; 10 g of composite powder was placed in In the corundum ark, in a hydrogen atmosphere (gas flow rate of 100mL / min), the heating rate was 10°C / min to 750°C, kept for 2 hours, and then rapidly cooled (the average cooling rate was 100°C / min), and the...

Embodiment 2

[0041] The process of preparing nitrogen-doped three-dimensional graphene-supported carbon-coated copper nanomaterials in this example is the same as that of Example 1, except that 9 mL of 2 mg / mL was added dropwise under stirring in Example 1. Change the nitrogen source urea solution to 22 mL of urea solution with a concentration of 2 mg / mL dropwise under stirring. Thus, a mixed precursor solution with an atomic ratio of carbon and nitrogen of 95:5 can be obtained. The nitrogen-doped three-dimensional graphene-supported carbon-coated copper nanomaterial powder material SEM photo 2 prepared by this example is shown in the figure.

Embodiment 3

[0043] The process of preparing nitrogen-doped three-dimensional graphene-supported carbon-coated copper nanomaterials in this example is the same as that of Example 1, except that 9 mL of 2 mg / mL was added dropwise under stirring in Example 1. Change the nitrogen source urea solution to 44 mL of urea solution with a concentration of 2 mg / mL dropwise under stirring. Thus, a mixed precursor solution with an atomic ratio of carbon and nitrogen of 90:10 can be obtained. The SEM photos of the nitrogen-doped three-dimensional graphene-loaded carbon-coated copper nanomaterial powder material prepared by the present embodiment are as follows: image 3 shown.

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Abstract

The invention relates to a nitrogen-doped three-dimensional graphene loaded carbon coated copper substrate material and a preparation method. Nitrogen-doped three-dimensional graphene loaded carbon coated copper nanoparticles are directly synthesized with a one-step chemical vapor deposition method, the costs of raw materials used in preparation are low, the process is simple and easy to operate, and macro production is facilitated; the obtained carbon coated copper nanoparticles are subjected to in-situ synthesis and uniformly loaded on the surface of three-dimensional graphene, and the technical problem of non-uniform distribution of an exterior addition method is solved; the lower detection limit of the nitrogen-doped three-dimensional graphene loaded carbon coated copper substrate material after coating on probe molecule crystal violet can be up to 1*10 <-6> mol / L, and better stability is achieved; according to the method, the process is simple, and the substrate material prepared with the method has excellent detection effect.

Description

technical field [0001] The invention relates to a nitrogen-doped three-dimensional graphene-loaded carbon-coated copper base material and a preparation method thereof, which belong to the preparation technology of surface-enhanced Raman spectrum base materials. Background technique [0002] As one of the important technologies in modern detection, surface-enhanced Raman spectroscopy has been widely used in many fields such as biology, medicine, and chemical synthesis analysis due to its high sensitivity, low fluorescence background, and no damage to the detection sample. , showing attractive development prospects. The preparation of active substrates is the prerequisite for obtaining surface-enhanced Raman signals. The development of new preparation technologies and the development of new surface-enhanced Raman spectroscopy substrate materials with high sensitivity, repeatability and stability are the key to further promote the application of surface-enhanced Raman spectrosc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65C03C17/22C01B31/04
CPCC03C17/22C03C2217/28C03C2218/30G01N21/658
Inventor 赵乃勤张翔何春年师春生刘恩佐李家俊
Owner TIANJIN UNIV
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