Preparation and regulation method of a high-color fluorescent carbon nanodot

Abstract

A method for preparing and regulating fluorescent carbon nano-dots with high color quality relates to the field of luminescent nano-materials. Dissolve diamine compounds and phenolic compounds in solvent A for mixing, put them into a reaction kettle, and control the temperature at 100-300°C for solvothermal reaction for 2-48 hours; obtain fluorescent carbon nano point, and then purify. Fluorescent carbon nanodots with high color quality can be obtained, the CIE chromaticity coordinates are (0.33,0.33), the CRI value is as high as 93, the CCT is 5453K, the standard white light emission, and the fluorescence spectrum range is within the coverage of 380-700nm. The degree of matching with the standard sunlight spectrum can reach 85%‑114%.

Description

technical field [0001] The invention relates to the field of luminescent nanomaterials, more specifically, to the preparation, purification and application of high-color-quality, multicolor fluorescent carbon nano-dots. Background technique [0002] As the most widely existing element in nature, carbon element constitutes the earth on which human beings live in various forms. With the continuous development of nanotechnology, carbon nanomaterials have attracted much attention because of their properties of light, magnetism, electricity, heat, and sound, and are developing rapidly. Especially the rising star fluorescent carbon dots in the carbon nano family, its fluorescence is stable and resistant to photobleaching (Small 2012,8:281-290.); the excitation spectrum is wide and continuous (J.Am.Chem.Soc.2006,128 :7756-7757.); The emission wavelength is adjustable (Adv. Mater. 2017, 29: 1604436.) and so on have become its unique advantages. In 2004, researchers discovered fluo...

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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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