TiO2 and Al2O3 were purchased from Evonik Industries (Hanau, Germany). Well-dispersed CoFe2O4, ZnO and SiO2 were synthesized at Biterials Co., Ltd. The spin trapping agents were 5,5-dimethyl-1-pyrroline N-oxide (DMPO) for •OH, 5-tert-butoxycarbonyl-5-methyl-1-pyrroline-N-oxide (BMPO) O2−, and 2,2,5,5-tetramethyl-3-pyrroline-3-carboxamide (TPC) for 1O2.
The nitrone spin-trap reagents 5,5-dimethyl-1-pyrroline N-oxide (DMPO, 99.9%) and 5-tert-butoxycarbonyl-5-methyl-1-pyrroline-N-oxide (BMPO) were purchased from Dojindo (Tokyo, Japan). Sedimented CoFe2O4, 2,2,5,5-tetramethyl-3-pyrroline-3-carboxamide (TPC), iron(II) sulfate (FeSO4), hydrogen peroxide (H2O2), hypoxanthine (HPX), xanthine oxidase (XOD), diethylenetriaminepentaacetic acid (DTPA), phosphate buffer solution, dimethyl sulfoxide (DMSO) and Rose Bengal were purchased from Sigma-Aldrich (St. Louis, Missouri, USA). 4-hydroxyl-2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPOL) was purchased from JEOL (Tokyo, Japan). Syringe filters (0.20 μm pore size) were purchased from Sartorius (Goettingen, Germany). An ultraviolet (UV)-B lamp (1.6 W, 0.170 A, G8T5E) was purchased from Sankyo Denki (Tokyo, Japan). The visible-light lamp (6 W, 60 mA, SSL-012458) and green lamp (6 W, 60 mA, ST-5030) were purchased from STECH LED (Gyeonggi-do, Korea).
The nitrone spin-trap reagents 5,5-dimethyl-1-pyrroline N-oxide (DMPO, 99.9%) and 5-tert-butoxycarbonyl-5-methyl-1-pyrroline-N-oxide (BMPO) were purchased from Dojindo (Tokyo, Japan). Sedimented CoFe2O4, 2,2,5,5-tetramethyl-3-pyrroline-3-carboxamide (TPC), iron(II) sulfate (FeSO4), hydrogen peroxide (H2O2), hypoxanthine (HPX), xanthine oxidase (XOD), diethylenetriaminepentaacetic acid (DTPA), phosphate buffer solution, dimethyl sulfoxide (DMSO) and Rose Bengal were purchased from Sigma-Aldrich (St. Louis, Missouri, USA). 4-hydroxyl-2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPOL) was purchased from JEOL (Tokyo, Japan). Syringe filters (0.20 μm pore size) were purchased from Sartorius (Goettingen, Germany). An ultraviolet (UV)-B lamp (1.6 W, 0.170 A, G8T5E) was purchased from Sankyo Denki (Tokyo, Japan). The visible-light lamp (6 W, 60 mA, SSL-012458) and green lamp (6 W, 60 mA, ST-5030) were purchased from STECH LED (Gyeonggi-do, Korea).