Preparation and regulation method of high-chromaticness fluorescent carbon nanodots

Abstract

The invention discloses a preparation and regulation method of high-chromaticness fluorescent carbon nanodots, and relates to the technical field of luminescent nanomaterials. The method comprises thefollowing steps: dissolving a diamine compound and a phenol compound in a solvent A for mixing, loading the mixture into a reaction kettle, and controlling the temperature at 100 to 300 DEG C to perform a solvothermal reaction for 2 to 48 hours to obtain high-chromaticness fluorescent carbon nanodots; then purifying. The CIE chromaticity coordinate of the high-chromaticness fluorescent carbon nanodots is (0.33, 0.33), the CRI value is up to 93, the CCT is 5453K, standard white light emission is realized, the fluorescent spectrum range is in a coverage range of 380 to 700 nm, and the matchingdegree with a standard sunlight spectrum can be up to 85 to 114 percent.

Description

Technical field [0001] The invention relates to the field of luminescent nanomaterials, and more specifically, to the preparation, purification and application of high-color, multicolor fluorescent carbon nanodots. Background technique [0002] As the most widespread element in nature, carbon element constitutes the earth on which humans depend in various forms. With the continuous development of nanotechnology, carbon nanomaterials have attracted attention because of their many properties such as light, magnetism, electricity, heat, and sound, and have developed rapidly. Especially the rising star fluorescent carbon dots in the carbon nano family have stable fluorescence and resistance to photobleaching (Small 2012, 8:281-290.); the excitation spectrum is wide and continuous (J.Am.Chem.Soc.2006,128 :7756-7757.); Adjustable emission wavelength (Adv.Mater.2017,29:1604436.) has become its unique advantage. In 2004, researchers discovered fluorescent carbon nanoparticles for the f...

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Problems solved by technology

In 2004, researchers discovered fluorescent carbon nanoparticles for the first time when purifying single-walled carbon nanotubes (J.Am.Chem.Soc.2004,126:12736-12737.); in 2006, it was officially named carbon nanoparticle Dots (J.Am.Chem.Soc.2006,128:7756-7757.); During the 14 years of rapid development of fluorescent carbon nanodots, more than 25,000 papers on carbon nanodots have been published by researchers all over the world. It has been widely reported (Web of Science), but there are still many challenges in the study of efficient carbon nanodots for long-wavelength emission

At present, the preparation of carbon nanodots with a high degree of matching with the solar spectrum, and the reduction of the existence of harmful blue light to the human eye, and the reports of carbon nanodots that can be adjusted at the same time are relatively rare.

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