Preparation method of garcinia mangostana-based carbon nanodot and application of carbon nanodot to detecting ferric ions as fluorescent probe

Abstract

The invention relates to a preparation method for a garcinia mangostana-based carbon nanodot and application of the carbon nanodot as a fluorescent probe to detecting ferric ions, and aims to solve the technical problem that an existing preparation method of the carbon nanodot is time-consuming. The preparation method of the carbon nanodot comprises the following steps: putting pulp of garcinia mangostana into a crucible for roasting and drying to obtain a solid; then, heating the solid in an electrothermal furnace, and cooling and crushing after the solid turns yellow brown from white in color to obtain yellow brown powder; dissolving the yellow brown powder with ultrapure water, magnetically stirring, performing ultrasonic treatment and centrifugally extracting supernate; filtering and dialyzing the supernate, and drying and crushing obtained carbon nanodot solution in vacuum to obtain carbon nanodot powder (MCDs). The carbon nanodot powder can serve as the fluorescent probe to interact with the ferric ions, so that fluorescence of the MCDs is quenched and a MCDs-Fe<3+> compound is formed, and therefore, detection on the ferric ions is realized. The fluorescent probe can be used in the field of fluorescent sensors.

Description

technical field

[0001] The invention relates to a preparation method of carbon nano-dots and an application as a fluorescent probe to detect ferric ions, belonging to the field of nano-fluorescent sensors. Background technique

[0002] In recent years, carbon nanodots have attracted much attention as a new type of fluorescent material. In addition to being rich in water-soluble functional groups such as hydroxyl and carboxyl groups, its surface also has excellent optical properties such as high fluorescence intensity, good photostability, and resistance to photobleaching. Therefore, carbon nanodots with low toxicity and good water solubility have good biocompatibility, and have broad application prospects in cell labeling and cell imaging.

[0003] Heavy metals are very harmful to the body and human health. Iron is one of these elements and is widely used in industrial production and daily products, which will eventually be released into the environment. Therefore, the st...

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