An “on-off-on” fluorescence probe for glyphosate detection based on Cu2+ modulated g-C3N4 nanosheets

Abstract

The analysis of glyphosate is essential to agricultural production, environment protection and public health. Herein, we proposed a fast and convenient “on-off-on” fluorescence platform for sensitive detection of glyphosate via Cu2+ modulated g-C3N4 nanosheets. The fluorescence of the system was quenched by Cu2+. With the presence of glyphosate, the fluorescence could be restored due to the formation of Cu2+- glyphosate complex. The proposed method was cost-effective with label-free and enzyme-free. Moreover, it exhibits high sensitivity with a low detection limit of 0.01 μg/ml. Furthermore, the proposed method has been successfully monitored glyphosate in real samples.

An on–off–on fluorescent probe for the detection of glyphosate based on a Cu2+-assisted squaraine dye sensor

“…There are many sensors that have been reported for GLY detection. For example, Hong et al , 15 Qin et al 23 and Kimani et al 24 reported nano-sensors; their detection limit can reach 0.035–10 ng mL −1 . Wang et al 16 reported a method with carbon dots as fluorescent sensor, whose detection limit can reach 16 ng mL −1 .…”