Brassicaceae Plant Precursor for the Facile Synthesis of Carbon Dots

Carbon Dots (CDs) are zero-dimensional carbon nanoparticles with a very small size and have attracteda lot of attention due to their physical, chemical and optical properties [۱]. CDs have prominentadvantages such as simple and inexpensive synthesis, a wide selection of precursors, good watersolubility, high sensitivity and selectivity, tunable surface and fluorescence properties, low toxicity,superior electron transfer ability, high chemical stability, excellent photostability, and cheap scale-upproduction [۲, ۳]. Carbon dots have wide applications due to their outstanding features. CDs are madefrom numerous carbon precursors. CD preparation can be done through top-down and bottom-upsynthesis methods [۴]. In this study, Brassicaceae plants were used to synthesize carbon dots byhydrothermal and pyrolysis methods. In short, in the hydrothermal method, ۲ g of the precursor afterpreparation with ۲۰ ml of distilled water was placed in a stainless steel autoclave with Teflon coating andthen the mixture was placed in an oven at ۲۰۰ ° C for ۳, ۶, and ۸ hours. After cooling at ambienttemperature, a dark brown solution was obtained, which was filtered through filter paper. The liquid waskept at ۴°C for further use. The black solid was dried at ambient temperature for one day. The solid blackcarbon material obtained in different hours were also compared with each other. In the pyrolysis method,۱ g of precursor was placed in a beaker. The beaker containing the precursor was placed in a largerbeaker, then it was placed in an oven at a temperature of ۲۰۰°C for ۸ hours. A solid black carbon materialwas obtained from pyrolysis method. In the hydrothermal method, by increasing the duration of theprecursor’s placement in the oven, the obtained solid black carbon material will become blacker. In ۸hours, the material obtained is blacker than in ۶ hours, and in ۶ hours, the material obtained is blackerthan in ۳ hours. The Brassicaceae plant is easily available and using it, carbon dots can be produced byhydrothermal and pyrolysis methods without the need for chemicals and cheaply.

کلیدواژه ها:

Carbon Dots ، Hydrothermal ، Pyrolysis