Surface plasmon resonance-induced visible light photocatalytic TiO2 modified with AuNPs for the quantification of hydroquinone

The impregnation of size-controlled gold nanoparticles (AuNPs) on an anatase TiO2 structure ([email protected]2) was studied for the photoelectrochemical detection hydroquinone (HQ) under visible light illumination integrated into a flow injection analysis (FIA) setup. crystalline form preserved during synthesis and homogeneous distribution AuNPs over confirmed. Its photoelectrocatalytic activity improved due to presence AuNPs, preventing charge recombination in improving its absorption ability by surface plasmon resonance effect (SPR). FIA system used order significantly reduce electrode fouling electroanalysis through periodic washing steps surface. During amperometric process, reactive oxygen species (ROS), generated [email protected]2, participate oxidation process HQ. reduction oxidized HQ, i.e. benzoquinone (BQ) occurs applying negative potential measurable response will be proportional initial HQ concentration. influencing parameters photocurrent such as applied potential, rate pH were investigated. linear correlation between concentration recorded (range 0.0125 – 1.0 µM) with limit (LOD) 33.8 nM sensitivity 0.22 A M?1 cm?2. In this study, we illustrated first time that allows sensitive phenolic substances green laser using system.