Photocatalytic Activities of N doped TiO2 coatings on 316L stainless steel by plasma alloying
Nitrogen doped titanium dioxide (N-TiO2) coatings were fabricated by oxidative of the TiNx coatings in the air.TiNx coatings were prepared on stainless steel (SS) substrates by plasma surface alloying technique.The reference TiO2 sample was also deposited by oxidative of the Ti coatings in the air.The as-prepared coatings were characterized by X-Ray diffraction (XRD),X-ray photoelectron spectroscopy (XPS),scanning electron microscopy (SEM) and ultra violet-visible absorption spectroscopy (UV-Vis).The formation of anatase type TiO2 is confirmed by XRD.SEM measurement indicates a rough surface morphology with sharp,protruding modules after annealing treatment.Optical properties reveal an extended tailing of the absorption edge toward the visible region due to nitrogen presence.The band gap of the N-doped sample is reduced from 3.25 eV to 3.08 eV compared with the undoped one.All the N-doped samples show red shift in photoresponse towards visible region and improved photocurrent density under visible irradiance is observed for the N-doped samples.The photocatalytic activity was evaluated via the photocatalytic oxidation of methylene blue (MB) in aqueous under visible light irradiation at room temperature.The results revealed that the N-doped samples extended the light absorption spectrum toward the visible region.The degradation rate of N-TiO2 is 20% in visible irradiation for 150 min.
TiO2 N doped photocatalysis stainless steel plasma alloying
Wang Hefeng Shu Xuefeng Li Xiuyan Tang Bin
Institute of Applied Mechanics and Biomedical Engineering, Taiyuan University of Technology, Taiyuan Department of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan, 030024, P R Ch Surface Engineering Institute, Taiyuan University of Technology, Taiyuan, 030024, P R China
国际会议
上海
英文
185-185
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）