Method of adopting laser radiation for preparing reduction-oxidation graphene

Abstract

The invention belongs to a method for reducing graphite oxide, and relates to a method of adopting laser radiation for preparing reduction-oxidation graphene. No method in the existing technology can be used to produce a great deal of graphene, thus the material with important value can not be applied. The method comprises the following steps: pouring polar solvent in a quartz container, dissolving graphite oxide in polar solvent to prepare 0.01mg/ml-10mg/ml of polar graphite oxide solution; adjusting the pH value of the polar graphite oxide solution to 9-10, performing supersonic vibration for 1-2 hours; and using excimer laser with more than 1Hz of frequency, 157-353nm of wavelength and more than 40mJ/cm2 of energy density to irradiate the prepared graphite oxide solution to obtain the reduction-oxidation graphene. The method has the advantages that the preparation technology is simple, the preparation time is short; the preparation process can not cause environmental pollution; the prepared graphene product has high reductivity and good product quality; and the equipment is simple, and the method is suitable for industrial production.

Description

technical field [0001] The invention belongs to a method for reducing graphite oxide, in particular to a laser irradiation method for preparing reduced graphene oxide. Background technique [0002] Graphene was produced in 2004 by Andre K. Geim of the University of Manchester, UK. They separated graphite into smaller fragments, peeled off thinner graphite flakes from the fragments, then taped a special plastic tape to the sides of the flakes, peeled the tape, and the flakes split in two. By repeating this process, thinner and thinner flakes of graphite can be obtained, some of which consist of only one single layer of carbon atoms—making graphene. Graphene, a new type of two-dimensional carbon nanostructure, exhibits excellent thermal, mechanical and electrical properties macroscopically due to its unique nanostructure. Graphene is the thinnest known material, very strong and hard, and the strongest substance known to man. Stronger than diamonds and 100 times stronger tha...

AI Technical Summary

Problems solved by technology

The shortcoming of prior art chemical method is: 1, the strong reductant hydrazine hydrate that chemical method uses is poisonous, is difficult to remove from product, causes damage to environment; 2, the consumption time of reducing graphite oxide is long, and reduction degree is low

[0008] Although the heating method can obtain graphene oxide with good electrical conductivity, the disadvantages of this method are: 1. Low yield; 2. High temperature requirements and high energy consumption; 3. The quality of the obtained graphene oxide product is not ideal

Therefore, large-scale production cannot be carried out using the heating method.

There is no method in the prior art that can produce graphene in large quantities, so that this new material that has an important role in promoting the development of science and technology, and a material that has important use value for modern electronic technology and material technology cannot be applied to production practice among

[0009] Due to the important role of graphene in the development of modern science and the fact that the existing technology cannot be mass-produced, a production method is invented that is simple, less time-consuming, and has no pollution to the environment. The graphene oxide product has a high degree of reduction and is easy to implement Graphite oxide reduction method for industrial scale production is very important

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