title: Preparation of N-doped TiO2 by oxidizing TiN and its application on phenol degradation.
abstract: Incomplete oxidation of titanium nitride (TiN) to prepare nitrogen-doped TiO2 was verified by calcining TiN at different temperatures in air for 30 min. The as-prepared samples were characterized by X-ray diffraction, UV-Vis diffuse reflectance spectra and X-ray photoelectron spectroscopy. The results confirmed that oxidizing TiN incompletely is an effective and simple method to prepare nitrogen-doped TiO2. Photocatalytic degradation of phenol was conducted to evaluate the photocatalytic activity of as-prepared samples. The results showed that phenol can be degraded efficiently by the as-prepared samples under visible light; low phenol concentration was conducive to degradation; the optimum calcination temperature and photocatalyst dosage are 650 °C and 0.5 g/L, respectively. The effects of different light sources on phenol degradation were compared. The reusability of nitrogen-doped TiO2 was tested and the results indicated a relatively good reusability under laboratory conditions.
authors.affiliation: Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130026, China E-mail: huangjg@jlu.edu.cn.
authors.forename: Ji-Guo
authors.initials: JG
authors.lastname: Huang
authors.forename: Xiao-Guang
authors.initials: XG
authors.lastname: Zhao
authors.forename: Meng-Yang
authors.initials: MY
authors.lastname: Zheng
authors.forename: Sen
authors.initials: S
authors.lastname: Li
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Xing-Juan
authors.initials: XJ
authors.lastname: Liu
mesh_terms: D009584:Nitrogen / Q000737:chemistry*; D010084:Oxidation-Reduction; D019800:Phenol / Q000737:chemistry*; D013472:Sunlight; D013997:Time Factors; D014025:Titanium / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry; D018508:Water Purification / Q000379:methods
chemical_list: D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D019800:Phenol; C041500:titanium nitride; D014025:Titanium; D009584:Nitrogen