Simple and green synthesis of boron-, sulfur-, and nitrogen-co-doped carbon dots as fluorescent probe for selective and sensitive detection of sunset yellow

摘要: Herein, we have reported the synthesis of boron-, sulfur-, and nitrogen-co-doped carbon dots (B/S/N-CDs) by one-step hydrothermal method using D-(+)-maltose monohydrate, boracic acid, thiocarbamide as precursors. The prepared B/S/N-CDs possess good water dispersibility, excellent pH stabilities, resistance to photobleaching. Furthermore, transmission electron microscope image indicates that are homogeneously spherical show dispersion. Noticeably, bright blue photoluminescence with a quantum yield 8.9% in aqueous solution can be used potent photoluminescent probe for selective sensitive detection sunset yellow (SY). Compared other food colors, SY dramatically quench fluorescence B/S/N-CDs. Meanwhile, intensity displays linear response concentration range 0–70μM (R2=0.9980) limit is low 4.65nM. The also applied SY...