title: Preparation, characterization, and photocatalytic activity evaluation of Fe-N-codoped TiO2/fly ash cenospheres floating photocatalyst.
abstract: Nitrogen-doped titanium dioxide (TiO2) and Fe-N-codoped TiO2layers on fly ash cenospheres (FAC) as floating photocatalyst were successfully prepared through sol-gel method. Photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), ultraviolet (UV)-Vis diffuse reflectance spectroscopy (DRS), and nitrogen adsorption analyses for Brunauer-Emmett-Teller (BET) specific surface area. Photocatalytic efficiency of the prepared catalyst was evaluated through using the decomposition of Rhodamine B (RhB) as a model compound under visible light irradiation. Photocatalytic activity and kinetics of catalyst under visible light were detected in details from different Fe/Ti mole ratios by detecting photodegradation of RhB. Experimental results show that when the calcination temperature was 550 °C, the dosage of FAC was 3.0 g, and the mole ratio of Fe/Ti was 0.71 %; the synthesized Fe-N-TiO2/FAC photocatalyst presented as anatase phase and that N and Fe ions were doped into TiO2lattice. The material's specific surface area was 34.027 m2/g, and UV-Vis diffuse reflectance spectroscopy shows that the edge of the photon absorption has been red shifted up to 400-500 nm. Fe-N-codoped titanium dioxide on FAC had excellent photocatalytic activity during the process of photodegradation of RhB under visible light irradiation.
authors: College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China.
authors: Jingke
authors: J
authors: Song
authors: College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China. wangxj@tongji.edu.cn.
authors: Xuejiang
authors: X
authors: Wang
authors: College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China.
authors: Yunjie
authors: Y
authors: Bu
authors: College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China.
authors: Jing
authors: J
authors: Zhang
authors: College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China.
authors: Xin
authors: X
authors: Wang
authors: College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China.
authors: Jiayu
authors: J
authors: Huang
authors: College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China.
authors: Jie
authors: J
authors: Chen
authors: College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China.
authors: Jianfu
authors: J
authors: Zhao
mesh_terms: D000327:Adsorption; D002384:Catalysis; D060729:Coal Ash; D008027:Light; D008855:Microscopy, Electron, Scanning; D009584:Nitrogen / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D010782:Photolysis; D012235:Rhodamines; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D014025:Titanium / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*; D014961:X-Ray Diffraction
chemical_list: D060729:Coal Ash; D012235:Rhodamines; C009495:titanium dioxide; D014025:Titanium; C029773:rhodamine B; D009584:Nitrogen
keywords: Fe–N-codoped TiO2; Fly ash cenospheres; Photodegradation; Visible light