Photoelectrocatalytic properties of nitrogen doped TiO2/Ti photoelectrode prepared by plasma based ion implantation under visible light

• Published in: Journal of hazardous materials Vol. 175; no. 1-3; pp. 524 - 531
• Main Authors: Han, Lei, Xin, Yanjun, Liu, Huiling, Ma, Xinxin, Tang, Guangze
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier 15.03.2010
• Subjects: Applied sciences; Catalysis; Catalytic reactions; Chemical engineering; Chemistry; Electrochemistry - instrumentation; Electrochemistry - methods; Electrodes; Equipment Design; Exact sciences and technology; General and physical chemistry; Ions; Light; Microscopy, Atomic Force - methods; Microscopy, Electron, Scanning - methods; Nitrogen - chemistry; Photochemistry - methods; Pollution; Reactors; Rhodamines - chemistry; Surface Properties; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Titanium - chemistry; X-Rays; Atomic force microscopy; Scanning electron microscopy; Plasma; Ion implantation; Pollutant behavior; Photocatalysis; Doping; Plasma based ion implantation (PBII); Nitrogen; X ray diffraction; Anodization; Electrocatalysis; Ultraviolet radiation; Visible radiation; Photoelectron spectrometry; Photoelectrocatalysis; Ti photoelectrode; TiO; Titanium oxide; Catalyst; Photochemical degradation; Reflectance
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2009.10.037

Nitrogen doped TiO(2)/Ti photoelectrodes were prepared by a sequence of anodization and plasma based ion implantation (PBII). The properties of this photoelectrode were characterized by scanning electronic microscopy (SEM), atomic force microscopy (AFM), X-ray diffraction (XRD), X-ray photoelectron spectrometry (XPS), Ultra violet/visible light diffuse reflectance spectra (UV/vis/DRS), surface photovoltage (SPV), etc. Photoelectrocatalytic (PEC) performance of N-doped TiO(2)/Ti photoelectrode was tested under visible light irradiation. Their photocatalytic activity was evaluated by degradation of Rhodamine B (Rh.B). The results of XPS showed that nitrogen element was in form of three species, i.e. beta-N, molecular gamma-N and O-Ti-N, which existed in the lattices of TiO(2) and gaps between molecules. The results of UV/vis/DRS spectra and SPV revealed that proper doping of nitrogen could expand the response of photoelectrodes towards visible light and diminish the recombination of photo-generated holes and electrons, respectively. The photoelectrocatalytic activity of N-doped TiO(2)/Ti photoelectrodes was superior to those of undoped one under visible light region irradiation.