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g‐C 3 N 4 /TiO 2 Nanocomposites for Degradation of Ciprofloxacin under Visible Light Irradiation
Author(s) -
Yang Zhen,
Yan Jia,
Lian Jiabiao,
Xu Hui,
She Xiaojie,
Li Huaming
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201600861
Subject(s) - photocatalysis , nanocomposite , visible spectrum , materials science , irradiation , degradation (telecommunications) , graphitic carbon nitride , photochemistry , absorption (acoustics) , band gap , nuclear chemistry , chemical engineering , nanotechnology , catalysis , chemistry , optoelectronics , composite material , organic chemistry , physics , telecommunications , computer science , nuclear physics , engineering
The graphitic carbon nitride (g‐C 3 N 4 ), possessing the suitable band gap (2.7 eV), is benefit for TiO 2 modification and improving photocatalytic efficiency for the degradation of organic pollutants under visible light irradiation. In this work, the g‐C 3 N 4 /TiO 2 nanocomposites were synthesized by using a simple sol‐gel method. It was demonstrated that the hybridization between TiO 2 nanoparticles and g‐C 3 N 4 was successfully formed. The DRS analysis showed that the addition of g‐C 3 N 4 improved the optical absorption of TiO 2 in the visible region, and it means that more light energy could be absorbed for enhancing the photocatalytic activity. The g‐C 3 N 4 /TiO 2 nanocomposites showed superior photocatalytic performance for the degradation of ciprofloxacin (CIP) under visible light irradiation, compared with pure TiO 2 and commercial P25 (Degussa). Moreover, radical trap experiment was carried out, which indicated that the hole acted as the main reactive species for the photocatalytic degradation of CIP. A possible photocatalytic mechanism of g‐C 3 N 4 /TiO 2 nanocomposite for the enhanced degradation of CIP under visible light irradiation was also proposed.