TY - JOUR
T1 - Improved visible light photocatalytic activity of fluorine and nitrogen co-doped TiO 2 with tunable nanoparticle size
AU - Cheng, Junyang
AU - Chen, Jin
AU - Lin, Wei
AU - Liu, Yandong
AU - Kong, Yan
N1 - Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/3/30
Y1 - 2015/3/30
N2 - Fluorine and nitrogen co-doped TiO 2 (F-N-TiO 2 ) photocatalysts with enhanced photocatalytic activities were facilely synthesized by a simple one-step hydrothermal method using Ti(SO 4 ) 2 as an economical precursor, and hydrofluoric acid and ammonia as F and N source, respectively. The structure, morphology, and optical properties of produced nanoparticles were characterized by X-ray diffraction (XRD), N 2 adsorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectra (FT-IR) methods. The synergistic effects of F and N doping were systematically examined by changing the molar ratio of F/N. Compared with the un-doped F or N mono-doped TiO 2 , the co-doped samples exhibited significantly improved photocatalytic performance due to their synergistic effects under visible light. It was shown that F dopant promoted the crystal growth and crystallinity of samples, while N dopant hindered it to some extent, which resulted in the tunable particle size of obtained F-N-TiO 2 materials. The effects of F and N dopants on the enhanced photocatalytic activity of modified TiO 2 materials were also discussed. The degradation rate of methylene blue (MB) was achieved at 97.31% after 5 h reaction under visible light over the optimized sample of FN 3.5 T. The materials also showed excellent stability according to the recycling tests of the photodegradation of MB.
AB - Fluorine and nitrogen co-doped TiO 2 (F-N-TiO 2 ) photocatalysts with enhanced photocatalytic activities were facilely synthesized by a simple one-step hydrothermal method using Ti(SO 4 ) 2 as an economical precursor, and hydrofluoric acid and ammonia as F and N source, respectively. The structure, morphology, and optical properties of produced nanoparticles were characterized by X-ray diffraction (XRD), N 2 adsorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectra (FT-IR) methods. The synergistic effects of F and N doping were systematically examined by changing the molar ratio of F/N. Compared with the un-doped F or N mono-doped TiO 2 , the co-doped samples exhibited significantly improved photocatalytic performance due to their synergistic effects under visible light. It was shown that F dopant promoted the crystal growth and crystallinity of samples, while N dopant hindered it to some extent, which resulted in the tunable particle size of obtained F-N-TiO 2 materials. The effects of F and N dopants on the enhanced photocatalytic activity of modified TiO 2 materials were also discussed. The degradation rate of methylene blue (MB) was achieved at 97.31% after 5 h reaction under visible light over the optimized sample of FN 3.5 T. The materials also showed excellent stability according to the recycling tests of the photodegradation of MB.
KW - Co-dopants
KW - Methylene blue
KW - Photocatalysis
KW - Synergistic effect
KW - Titanium dioxide
UR - http://www.scopus.com/inward/record.url?scp=84924128161&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2015.01.218
DO - 10.1016/j.apsusc.2015.01.218
M3 - 文章
AN - SCOPUS:84924128161
SN - 0169-4332
VL - 332
SP - 573
EP - 580
JO - Applied Surface Science
JF - Applied Surface Science
ER -