Multi-functional fluorescence carbon quantum dots and preparation method and application thereof

Abstract

The invention provides multi-functional fluorescence carbon quantum dots and a preparation method and application thereof. The preparation method of the carbon quantum dots comprises the following steps: by taking phthalic acid as a raw material, adding ethanediamine and strong phosphoric acid to obtain a pale yellow solid slice, after reaction is stopped, naturally cooling to room temperature, adding ultrapure water, stirring to obtain a pale yellow solution, filtering with a filter membrane, and freeze-drying to obtain nitrogen phosphorus codoped fluorescence carbon quantum dot powder. The preparation process of the carbon quantum dots is simple, the raw material is wide in source and low-cost, and the preparation method is simple and fast; the prepared carbon quantum dots are stable inoptical property and good in biocompatibility, not only can be used for detecting manganese ions in traditional Chinese medicines and tea leaves, but also can serve as a temperature sensor, and meanwhile can be used for cell imaging.

Description

[0001] technology neighborhood [0002] The invention relates to a luminescent nanometer material, in particular to a carbon quantum dot, in particular to a double-doped multifunctional fluorescent carbon quantum dot and its preparation method and application. Background technique [0003] Carbon nanomaterials are a research hotspot in the field of nanoscience and technology. The zero-dimensional carbon nanomaterial fullerene was reported in 1985; one-dimensional carbon nanotubes were discovered in 1991; and graphene with a two-dimensional structure was prepared in 2004. At the same time, in 2004, Xu et al. observed for the first time luminescent carbon nanoparticles, also known as carbon quantum dots, during the preparation of single-walled carbon nanotubes by purifying arc discharge. In 2006, Sun Yaping of Clemson University synthesized carbon quantum dots for the first time by laser etching. In 2007, carbon quantum dots with a size of less than 2 nm and different luminesc...

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Problems solved by technology

Zhang Xiaoling et al. used adenosine triphosphate at 300°C for 2 hours to synthesize nitrogen and phosphorus co-doped carbon dots. The reaction materials were expensive and the reaction temperature was high. (Gong Y, Yu B, Yang W, et al.Phosphorus, and nitrogen co-doped carbon dots as a fluorescent probe for real-time measurement of reactive oxygen and nitrogen species inside macrophages[J].Biosensors&Bioelectronics,2016,79:822.)

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