A novel "turn-off" photoelectrochemical aptasensing platform for selective detection of tobramycin based on the TiC-MoS/BiOI heterojunction.

Tobramycin (TOB), as a widely used antibiotic, poses severe unpredictable risks to ecology and health. In this study, a novel photoelectrochemical (PEC) adapter sensor, based on its "turn-off" PEC mode, was constructed for TOB detection. This visible-light-driven photoelectrochemical (PEC) aptasensor was successfully developed for TOB detection using TiC-MoS/BiOI and TOB aptamer probes.

MWCNT modified Ni-Fe LDH/BiVO heterojunction: boosted visible-light-driven photoelectrochemical aptasensor for ofloxacin detection.

Sensitivity and selectivity, which can be identified by the photosensitivity of materials and the identification of elements, are two important factors for a photoelectrochemical aptasensor (PEC aptasensor). Herein, a patent PEC aptasensor for specifically detecting ofloxacin (OFL) was exploited, and a visible-light-active MWCNT/LDH/BiVO heterostructure was introduced as a photoactive material and identification elements, respectively. The combination of LDH with BiVO enhanced the photocurrent response, and MWCNT provided higher electron conductivity, which are advantageous for structuring PEC sensors.