To achieve effective removal of Dimethyl phthalate (DMP) under visible light LED (Vis-LED)

N-TiO2/Ti network catalyst was prepared on the surface of titanium mesh by one-step anodic oxidation of adding urea to electrolyte solution

and the DMP was degraded by multiple layers of N-TiO2/Ti mesh superposed in a reactor. The N-TiO2/Ti mesh was characterized by field emission scanning electron microscopy (FESEM)

energy dispersive X-ray spectroscopy (EDX)

X-ray diffraction spectroscopy (XRD)

X-ray photoelectron spectroscopy (XPS)

and UV-visible diffuse reflectance spectroscopy (UV-vis DRS). Results show that N element mainly participated in the form of substituted nitrogen

and both surface morphology and crystal structure of the TiO2 nanotubes were not changed. The forbidden band width of the N-TiO2/Ti mesh calculated by the Tauc/David-Mott formula was about 2.76 eV

and the absorption band edge was extended to 449 nm

where the visible light absorption performance was significantly enhanced. After the N-TiO2/Ti foil was equivalently stretched into 3 layers of N-TiO2/Ti mesh

the degradation rate of DMP increased by 7.5%. When 5 layers of N-TiO2/Ti mesh were superposed

the degradation rate of DMP tended to be stable and it increased by 25.7% compared with that of Ni-TiO2/Ti plate. Partial acidity or alkaline was beneficial to the degradation of DMP. The addition of H2O2 could promote the degradation of DMP

but H2O2 could not effectively degrade DMP under single use and visible light irradiation.