Novel Three‐dimensional Sensor for Rapid Detection of Pb(II) and Cd(II) in Edible Mushrooms

Abstract A sensing platform was developed based on the molybdenum disulfide‐reduced graphene oxide (MoS 2 ‐RGO). The flower‐like MoS 2 ‐RGO nanocomposite had a large number of active sites such as oxygen‐containing groups and highly reactive sulfur that contributed to the adsorption and preconcentration of heavy metal ions (HMIs). MoS 2 ‐RGO was synthesized by one‐step reduction method. Under optimized conditions, the limits of detection (LODs) for Pb(II) and Cd(II) was 0.13 μg/L and 0.59 μg/L with a linear range of 4.1–207.2 μg/L and 2.2–112.4 μg/L, respectively. The modified sensors had been successfully applied to detect Pb(II) and Cd(II) in three kinds of edible mushrooms.