Graphene/single-walled carbon nanotube/hemin nanocomposite and preparation method and application thereof

A technology of nanocomposite materials and single-walled carbon nanotubes, applied in the direction of material electrochemical variables, etc., can solve the problems of slow measurement, cumbersome operation, expensive equipment, etc., and achieve the effect of sensitive detection and simple preparation method

Active Publication Date: 2015-06-10
日照新睿招商发展有限公司
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Problems solved by technology

This method uses toxic reducing reagents, which is easy to pollute the environment, and the added toxic reagents may affect the safety of later applications
[0004] In addition, the national standard method for hydrogen peroxide detection is potassium perman

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  • Graphene/single-walled carbon nanotube/hemin nanocomposite and preparation method and application thereof
  • Graphene/single-walled carbon nanotube/hemin nanocomposite and preparation method and application thereof
  • Graphene/single-walled carbon nanotube/hemin nanocomposite and preparation method and application thereof

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[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] Material: hemin, called hemin in Chinese, molecular formula: C 34 h 32 ClFeN 4 o 4 , molecular weight: 651.95, purchased from Sigma. Single-walled carbon nanotubes and graphene are self-made in the laboratory.

[0027] 1. Preparation of graphene / single-walled carbon nanotubes / hemin (RGO / SWCNT / Hemin) nanocomposites

[0028] First, ultrasonically dissolve 1 g of hemin in 10 mL of tetrahydrofuran (THF), add it to 90 mL of distilled water, and continue ultrasonically adding 1 g of NaNO 3 and 5 mL of 1 mg / mL SWCNT. Insert 2 high-purity graphite rods (99.99%) into the mixture as positive and negative electrodes, and the distance between the 2 electrodes is 4 cm. A DC voltage of 10 V was applied to the two graphite rods under ultrasonic conditions. Electrolyze for 8 hours to end the reaction. The solution was first centrifuged at 3000 ...

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Abstract

The invention discloses a graphene/single-walled carbon nanotube/hemin (RGO-SWCNT-Hemin) nanocomposite, a preparation method of the nanocomposite and application of the nanocomposite for detection of the concentration of hydrogen peroxide. Firstly, hemin is dissolved in tetrahydrofuran in an ultrasonic mode and added to distilled water, and NaNO3 and SWCNTs continue to be added in an ultrasonic mode; two high-purity graphite rods serving as a positive electrode and a negative electrode are inserted into mixed liquor, 10V direct voltage is applied to the two graphite rods under ultrasonic conditions, electrolysis is conducted for 8 hours, sediment on the lower layer of the liquor is centrifugally removed after the reaction finishes, the mixed liquor is then subjected to centrifugal washing, and the RGO-SWCNT-Hemin nanocomposite is obtained. There is no literature report about the nanocomposite at current, the preparation method is simple, and the nanocomposite can be produced on a large scale. Besides, the H2O2 detection sensitivity of the nanocomposite is high.

Description

technical field [0001] The invention relates to the preparation of a graphene composite material, in particular to a graphene / single-wall carbon nanotube / hemin nanocomposite material and a preparation method and application thereof. Background technique [0002] Graphene is a two-dimensional carbon atom crystal with a thickness of only 0.34nm. Graphene's single-atom thickness and two-dimensional planar structure provide its extremely large surface area so that it can support a large number of various molecules, including metals, biomolecules, and fluorescent molecules. Moreover, the stable lattice structure of graphene makes it have excellent conductivity, and it has unique advantages in the field of high-sensitivity detection. Hemin is the catalytic center of many proteins, such as cytochrome, peroxidase, hemoglobin and myosin, which can catalyze a series of oxidation reactions like peroxidase. [0003] In the prior art, there have been some reports on the preparation of ...

Claims

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Application Information

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IPC IPC(8): G01N27/26
Inventor 范大和孔粉英王伟陈婷婷
Owner 日照新睿招商发展有限公司
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