Abstract
AbstractThis study introduces a novel photoelectrochemical (PEC) sensor for the highly selective detection of sulfur dioxide (SO2) using an organic photoactive molecule probe (OPM). OPM is synthesized through a one‐step coupling reaction, featuring a typical photosensitizer D‐π‐A structure. By covalently bonding OPM with a TiO2 substrate, a PEC sensor is constructed, exhibiting a significant photocurrent response under visible light excitation. The specific addition reaction between SO2 and OPM disrupts its conjugated structure, reducing the photocurrent response and achieving highly selective detection of SO2. The sensor demonstrates excellent performance in real water samples, emphasizing its practical applications.
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