The investigation of photo-induced chemiluminescence on Co2+-doped TiO2nanoparticles and its analytical application

摘要

A novel space- and time-resolved photo-induced chemiluminescence (PICL) analytical method wasndeveloped based on the photocatalysis of the Co2+-doped TiO2 nanoparticles. The PICL reactionnprocedure under the photocatalysis of Co2+-doped TiO2 nanoparticles was investigated using cyclicnvoltammetry and potentiometry. Meanwhile, the effect of the electrical double layer outside the Co2+-ndoped TiO2 nanoparticles on the PICL was investigated by contrasting with the Co2+-doped TiO2–SiO2ncore–shell nanoparticles. Significantly, the CL intensity increased apparently and the time of the CLnwas prolonged in the presence of procaterol hydrochloride because the mechanism of the enhancednPICL reaction may be modified. The route of the PICL was changed due to the participation of thenprocaterol hydrochloride enriched at the surface of the Co2+-doped TiO2–SiO2 in the PICL reaction,nwhich prolonged the time of the CL reaction and resulted in the long-term PICL. The analyticalncharacteristics of the proposed in-situ PICL method were investigated using the procaterolnhydrochloride as the model analyte. The investigation results showed that this new PICL analyticalnmethod offered higher sensitivity to the analysis of the procaterol hydrochloride and the PICL intensitynwas linear with the concentration of the procaterol hydrochloride in the range from ca. 2.0 u0002 10u000310 ton1.0 u0002 10u00038 g mLu00031.