A method for synthesizing solid-state carbon quantum dots by gas phase detonation

Abstract

The invention belongs to the technical field of preparation of carbon quantum dot materials, and discloses a method for synthesizing solid carbon quantum dots by gaseous detonation. The method comprises the following specific steps: taking citric acid as a carbon source, taking urea as a nitrogen source, mixing the two substances and tiling into a gaseous detonation tube; sealing the gaseous detonation tube and then vacuumizing; simultaneously heating the gaseous detonation tube to 60 DEG C or above; respectively filling the inner part of the gaseous detonation tube with hydrogen and oxygen asa detonation source; stopping heating the gaseous detonation tube and detonating hydrogen and oxygen mixed gas in the tube; after the gaseous detonation tube is cooled to 80 DEG C or less, opening the gaseous detonation tube and collecting yellow solid on the tube wall, namely the solid carbon quantum dots. The method has the advantages of simplicity, high efficiency, no need of subsequent processing and capability of synthesizing the solid carbon quantum dots on a large scale. The solid carbon quantum dots synthesized by the method disclosed by the invention do not need any matrix, and can emit fluorescence directly under the excitation of an ultraviolet lamp.

Description

technical field [0001] The invention belongs to the technical field of carbon quantum dot material preparation, and relates to a method for synthesizing solid carbon quantum dots by gas phase detonation. Background technique [0002] Carbon quantum dots, also known as carbon dots (CDs), are a new type of carbon nanofluorescent nanomaterials, which were first discovered in 2004 when nanotubes were purified by electrophoresis. The particle size of carbon quantum dots is generally less than 10nm. Compared with metal quantum dots, carbon quantum dots are non-toxic and less harmful to the environment. Compared with traditional carbon materials, carbon quantum dots have good fluorescence properties. In addition, carbon quantum dots also have excellent water solubility, chemical inertness, and adjustable fluorescence properties. Carbon quantum dots can also be combined with other organic substances, polymers, and inorganic molecules to achieve further functionalization. This perf...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a fast and convenient method for preparing solid carbon quantum dots in view of the problems of long time consumption, many processes, and inability to obtain solid carbon quantum dots in the existing preparation methods.

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