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Simulated Solar Light Responsive Carbon Nitride/ TiO 2 Nanofiber Heterojunction Photocatalyst: Synthesis, Characterization, and Photocatalytic Performance
Author(s) -
Zhang Jian,
Wang Yanjuan,
Hu Shaozheng
Publication year - 2015
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.10088
Subject(s) - photocatalysis , materials science , rhodamine b , x ray photoelectron spectroscopy , dielectric spectroscopy , carbon nitride , nanofiber , scanning electron microscope , chemical engineering , heterojunction , carbon nanofiber , nanotechnology , carbon nanotube , electrochemistry , optoelectronics , catalysis , composite material , chemistry , electrode , organic chemistry , engineering
A carbon nitride/ TiO 2 nanofiber heterojunction photocatalyst that is responsive to simulated solar light is prepared by a simple self‐assembly method. X‐ray diffraction ( XRD ), UV –vis spectroscopy, scanning electron microscopy ( SEM ), electrochemical impedance spectroscopy ( EIS ), and X‐ray photoelectron spectroscopy ( XPS ) are used to characterize the prepared catalysts. The results indicate that the TiO 2 nanofiber is coated by the g‐ C 3 N 4 sheet to form a core/shell structure, which is favorable for the fast interfacial charge transfer and separation of the photogenerated electron–hole pairs. The activity and stability of carbon nitride/ TiO 2 nanofiber heterojunction photocatalyst are tested in the photocatalytic degradation of rhodamine B ( RhB ) under simulated solar light. The rate constant of TiNF (0.3)‐ CN is found to be 0.044 min −1 , which is 4 and 2.2 times higher than that of single TiO 2 nanofiber and g‐ C 3 N 4 , respectively. A possible mechanism is proposed.