A novel dual-signal amplification photofuel cells aptasensor for atrazine ultrasensitive detection in grapes and tomatoes

Abstract

The residual of atrazine (ATZ) can disrupt the production of testosterone in animals, causing chemical castration in animals. Therefore, the monitoring of ATZ residue is essential for human health and ecological balance. Herein, a novel dual-signal amplification photofuel cells (PFC) aptasensor was proposed. The presence of a hole mediator and hollow structure enhances the efficiency of electron-hole pair separation and visible light absorption in the photoanode. Additionally, the effect of dye sensitization plays a crucial role in improving the conversion efficiency of photon-to-electrons in the photocathode. The as-prepared aptasensor realized sensitive detection of ATZ, with a board linear range from 1.0 × 10−13 ∼ 1.0 × 10−6 mol L−1 and a low detection limit of 3.3 × 10−14 mol L−1. The reliability of the as-prepared PFC aptasensor was verified by gas chromatography-mass spectrometry (GC-MS). Therefore, the manufactured PFC aptasensor is a prospective detection method for fruit and vegetables safety analysis.