Carbon nanotube uniformly and stably loaded with iron-containing nano particles and preparation method of carbon nanotube

Abstract

The invention relates to a carbon nanotube uniformly and stably loaded with iron-containing nano particles and a preparation method of the carbon nanotube. According to the invention, the carbon nanotube is prepared through the following steps: with a hydroxylated or carboxylation modified multiwalled or single-walled carbon nanotube, a non-ionic polymer surfactant, and an organic iron compound as raw materials and ethyl alcohol or methanol as a medium, reaction is carried out in a high-pressure reaction kettle with the filling amount of 80% for 4-24 h, and the product is heated for 5 minutes to 2 h under the conditions of 250-800 DEG C and inert gas protection. The obtained carbon nanotube uniformly and stably loaded with the iron-containing nano particles is characterized in that the iron-containing nano particles are uniformly loaded on the outer surface of the carbon nanotube, the nano particles are one of ferric oxide, ferroferric oxide, and iron, narrow in particle size distribution, and 5-20 nm in average particle size, and can be stably loaded on the carbon nanotube under the effects of severe mechanical dispersion or ultrasonic dispersion, and the carbon nanotube has a good application prospect in the fields of catalysis, sensors, electromagnetic shielding material, new energy material, biotechnology, high-performance composite material and the like.

Description

technical field [0001] The invention belongs to the technical field of processing and application of carbon nanomaterials, and in particular relates to a preparation method of carbon nanotubes uniformly and stably loaded with iron-containing nanoparticles. Background technique [0002] Carbon nanotubes are a new type of carbon material discovered in the early 1990s. They can usually be divided into single-walled carbon nanotubes, double-walled carbon nanotubes and multi-walled carbon nanotubes. The diameter of industrial carbon nanotubes is generally In the range of several to 100 nanometers, it has a large aspect ratio and is a typical one-dimensional nanomaterial. The unique composition and structure endow carbon nanotubes with excellent optical, electrical, magnetic, thermal and mechanical properties, and have broad application prospects. After a lot of basic and applied research, considerable research results and technological progress have been made in this field, and ...

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Problems solved by technology

The former generally has a simpler process and lower cost, but the loading of nanoparticles is uneven, the particle size is large and the distribution is wide [Cao Huiqun, Zhu Meifang, Li Yaogang. A preparation method of carbon nanotube magnetic composite material decorated with ferric oxide: China , CN1743387A], the latter process is relatively complicated, the cost is high, but the loading of nanoparticles is uniform, the particle size is small and the distribution is narrow [Gao Lian, Shan Yan. Magnetic composite powder and preparation of ferroferric oxide nanocrystal modified carbon nanotubes Method: China, CN1794372A]

Studies have found that the carbon nanotubes loaded with iron-containing nanoparticles obtained by the current method have poor stability during vigorous stirring or ultrasonic dispersion, and the nanoparticles are easy to fall off. In some application fields, this shortcoming is not conducive to its subsequent use

In the preparation methods disclosed in existing patents, organic iron generally needs to be decomposed in reaction media such as polyols or polyamines, which makes these technologies have limitations in terms of cost and environmental protection

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