A Method for Detecting Photochemical Activity of Carbon Nanotubes Using Transient Absorption Spectroscopy

A photochemically active, carbon nanotube technology, applied in the measurement of color/spectral properties, etc., can solve the problem of inability to quickly and accurately judge carbon nanotubes, and achieve the effects of low detection cost, simple condition control, and significant difference.
CN102967570BInactive Publication Date: 2015-08-26NANJING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV
Publication Date
2015-08-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for detecting photochemical activity of a carbon nano tube by utilizing a transient absorption spectrum technology and belongs to the field of photochemical activity detection of carbon nano tubes. The method comprises the following steps: a, preparing aqueous solution of the carbon nano tube, ultrasonically treating the aqueous solution of the carbon nano tube, standing, and taking supernatant liquid of the aqueous solution of the carbon nano tube as a detection object; b, analyzing photochemical properties of the aqueous solution of the carbon nano tube under illumination conditions by utilizing a laser flash photolysis instrument; and c, verifying and analyzing a characteristic peak of the transient absorption spectrum of the carbon nano tube obtained by the laser flash photolysis instrument in step b by utilizing a pulse radiolysis device. According to the detection method, aiming at a special carbon-based nano material such as the carbon nano tube, the photochemical activity particles in the aqueous solution can be conveniently and reliably detected, the carbon nano tube is insensitive to interference of an external environment, and a carbon nano tube sample is not required to be excessively modified and treated in the earlier stage.
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Description

technical field

[0001] The invention belongs to the field of photochemical activity detection of carbon nanotubes, and more specifically relates to a method for detecting photochemical activity of carbon nanotubes by using transient absorption spectrum technology. Background technique

[0002] Carbon nanotubes, like diamond, graphite, and fullerene, are also an allotrope of carbon. It is a long tube-shaped tube wall molecule, generally a coaxial tube formed by carbon atoms arranged in a hexagonal manner and then curled. If the tube is composed of only a single layer of carbon atoms, it is called a single-walled carbon nanotube, and when the tube is composed of multiple layers of carbon atoms, it is called a multi-walled carbon nanotube. Carbon nanotubes have the characteristics of large specific surface area, high hardness and thermal stability. In addition, because it is evolved from graphite, there are many unpaired free electrons on its tube wall, so carbon nanotubes al...

Claims

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