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Degradation of neonicotinoid insecticide dinotefuran (DIN) in dielectric barrier discharge (DBD) non-thermal plasma combined with lanthanum-doped titanium dioxide (La-TiO 2 ) system was investigated. A La-TiO 2  catalyst was prepared by the sol–gel method and characterized by SEM, XRD, and DRS. The effects of various factors (initial concentration, initial pH, input power, and addition of metal ions) on the removal rate of DIN were evaluated. The results indicated that when the initial concentration, input power, initial pH, and Fe 2+  catalyst ions were 100 mg/L, 150 W, 10.5 and 50 mg/L, respectively, the DIN degradation efficiency was improved to 99.0% by coupling 10 wt% La-TiO 2  at 180 min. La-TiO 2  showed excellent catalytic performance on DIN degradation in a DBD system. The removal rate decreased with the presence of H 2 O 2  and a scavenger, manifesting thatplays an imperative role in the degradation process. Furthermore, intermediate products were analyzed by MS and the possible degradation pathway of DIN was proposed.

Catalytic degradation of dinotefuran by dielectric barrier discharge plasma combined with La-doping TiO 2