Preparation method of non-toxic fluorescent material

Abstract

The invention discloses a preparation method of a non-toxic fluorescent material, wherein a compound containing phosphate ions is used as a catalyst, the temperature of the water solution of a soluble carbohydrate is kept higher than 100 DEG C for reacting to generate the simple substance carbon with the size of 1 to 100 nm, and the simple substance carbon and the residual organics form a shell-core structure in which the organics cover the simple substance carbon. The shell-core structure has fluorescent effect. Compared with the traditional preparation methods of a fluorescent material, the process of the invention uses the carbohydrate which is absolutely non-toxic and is low in price as the raw material, and uses the phosphates which can be recycled as the catalyst. The synthesis process is simple, the synthesis cost is low and the synthesis condition is not strict. The product can send out fluorescence continuously under the ultraviolet irradiation, and the decay period is long.

Description

technical field [0001] The invention relates to a preparation method of a fluorescent material, which belongs to the field of green, environment-friendly and non-toxic daily-use chemistry. Background technique [0002] At present, there are many kinds of commercial fluorescent agents, and their components are mainly divided into inorganic and organic. The inorganic components of commonly used commercial fluorescent agents contain heavy metals, rare elements and other components that are obviously harmful to the human body, such as zinc sulfide doped with cadmium. These compounds are not easy to decompose, so they tend to accumulate in the human body after contact and continue to poison the human body. The organic components of commonly used commercial fluorescent agents contain benzene rings, which can poison internal organs and even cause human cells to mutate or become cancerous. [0003] In order to overcome the toxic effects of the above fluorescent agents on organisms...

AI Technical Summary

Problems solved by technology

These compounds are not easy to decompose, so they tend to accumulate in the human body after contact and continue to poison the human body

The organic components of commonly used commercial fluorescent agents contain benzene rings, which can poison internal organs and even cause human cells to mutate or become cancerous

[0003] In order to overcome the toxic effect of the above fluorescent agents on organisms, scientific research institutions such as Cambridge University, Clementson University, and Tianjin University have reported that nano-scale graphite or quantum dots are obtained by bombarding graphite with lasers or ions, and then chemically synthesized with organic matter. Treat and modify its surface with acid to obtain nano-graphite core-organic shell mechanism, so as to obtain fluorescence, but the process is complicated and the cost is relatively high

For example: Sun et al. use laser to evaporate carbon, then condense into nano-carbon particles in water to obtain nano-carbon simple substance, and then obtain carbon nano-dot fluorescent agent after organic modification (see: Y.Sun et al., Quantum-Sized Carbon Dots fo Bright and Colorful Photoluminescence, J.AM.CHEM.SOC.2006, 128, 7756-7757); Zhou et al. used carbon nanotubes as raw materials and obtained fluorescent particles by electrochemical methods, but the electrolyte contained heavy metals , greatly increasing its toxicity (J.Zhou, C.Booker, R.Li, et al., J.AM.CHEM.SOC.2007, 129, 744-745); Liu et al boiled candle black ash with acid to obtain carbon nanoparticles, but its light yield is too low (H.Liu, T.Ye, C.Mao, ANGEW.CHEM.INT.Ed, 2007, 46, 6473-6475); Hu Shengliang et al. Graphite suspension, thereby obtaining nano-carbon, but the production efficiency of its fluorescent agent is too low (Hu Shengliang et al., Pulse laser preparation of luminescent carbon nanoparticles, "Chemical Journal of Chinese Universities", Vol 30, No.8, 1497-1500, 2009 August)

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