Integrated Mn-doped ZIF-67 derived hollow heterojunction sensors with enhanced electrocatalytic activity for sensitive detection of methyl parathion in fruits and vegetables

Methyl parathion (MP) is a highly toxic organophosphorus pesticide and poses a serious threat to food safety and public health. Herein, an integrated sensing platform combining hollow Mn-doped ZIF-67 with carboxylated carbon nanotubes to form a heterojunction (H-Mn/ZIF-67@COOH-CNTs) was successfully fabricated for sensitive recognition and ultrafast removal of MP. The constructed sensing platform demonstrated excellent analytical performance for MP under optimized conditions, featuring a broad linear range of 0.3–100 μM and a low detection limit of 0.024 μM. Furthermore, H-Mn/ZIF-67@COOH-CNTs achieved rapid removal of MP. The Langmuir fitting yielded a theoretical maximum adsorption capacity of 584.8 mg·g −1 , while a removal efficiency of 92.52% was achieved within 5 min. This research provides a reliable platform for the sensitive detection of MP in fruits and vegetables and its rapid removal from aqueous solutions, while offering novel insights for designing high-performance electrocatalysts in environmental monitoring and food safety testing.