Synthesis of Carbon Dots from Pear Juice for Fluorescence Detection of Cu2+ Ion in Water.

Abstract

In this work, a facile green hydrothermal method was developed for the synthesis of carbon dots with fluorescent property using pear juice as raw materials. The synthesized carbon dots were characterized by UV-vis, fluorescence and transmission electron microscopic techniques. The synthesized conditions were optimized and the obtained carbon dots exhibited an average size at 10 nm with bright emission centered at 455 nm (blue color) under UV light with the excitation wavelength at 360 nm. The as-prepared carbon dots exhibited quenching effect in the presence of Cu2+ ion and a method for Cu2+ ion detection in water was developed with acceptable selectivity. The synthesized fluorescent carbon dots showed advantages like easy preparation, low cost and environmental friendly. It could be useful in chemical and biochemical detection.