System for preparing graphene with purification and optical microwave reduction

Abstract

The invention provides a system for preparing graphene with purification and optical microwave reduction. The system can comprise a purification device and an optical microwave reduction device whichare sequentially connected, wherein the purification device comprises a feeding hole, a tank body, a first partition plate, a second partition plate, an ultrasonic unit and a discharge hole; the firstpartition plate and the second partition plate are transversely arranged in the tank body and divide the tank body into a reaction region, a filtering region and a collection region; the feeding hole, the discharge hole and a liquid drainage hole are connected with the three regions respectively; the optical microwave reduction device comprises a feeding unit, a reaction unit, a collection unit,a microwave irradiation unit and an optical wave irradiation unit; and the microwave irradiation unit and the optical wave irradiation unit are arranged around the reaction unit. The system provided by the invention has the beneficial effects that the purification device can effectively separate graphene oxide from impurity ions and is high in purification efficiency and low in cost; the optical microwave reduction device is rapid in heating speed without thermal inertia, is energy-saving and efficient and is high in reduction efficiency; and the equipment is long in service life, simple in structure and convenient to use.

Description

technical field [0001] The invention relates to the field of graphene preparation, in particular to a system for preparing graphene through purification and optical microwave reduction. Background technique [0002] At the beginning of the 21st century, nano-graphite sheets appeared in the scientific community. In 2006, two scientists from The University of Manchester in the United Kingdom cleverly prepared single-layer graphite through mechanical exfoliation, thus officially unveiling the veil of graphene as a material, and they also won the 2010 Nobel Prize in Physics prize. An ideal graphene material is composed of a single layer of graphite, and its carbon atoms are connected by sp 2 The hybrid orbitals are connected to form a stable six-membered ring structure. Studies have found that graphene materials have good various physical and chemical properties. For example: better electronic conductivity than metal gold, better mechanical strength than steel, super large s...

AI Technical Summary

Problems solved by technology

The existing purification equipment has problems such as low efficiency and poor washing effect in the washing process, which makes the produced graphene oxide products not high in purity and quality.

[0005] The existing graphene oxide reduction system has the following problems in the production process: First, the use of chemical reagents for reduction requires the use of a large amount of chemical reagents, which increases the by-products, increases the difficulty of subsequent cleaning, and increases the risk of environmental protection, resulting in cost The second is to use high-temperature thermal reduction, the reduction temperature of graphene oxide is high, and the uniformity of product quality obtained by different reduction temperatures cannot be guaranteed, and it will also cause problems such as increased ash content of the product and serious corrosion of equipment; the third is to use other reduction method (such as plasma), the production technology is difficult, the cost will increase exponentially, and it cannot be applied on a large scale in industrialization

[0006] Moreover, due to its hydrophilicity, graphene oxide is easy to contact with moisture in the air, forming acidic corrosive substances, which reduces the quality of graphene oxide and has obvious corrosion on equipment; these places where corrosion occurs will bring Into the metal impurity components, affecting product quality

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