期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 40, 页码 26851-26859出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b09061
关键词
TiO2(B); Ti3+ self-doping; single-crystalline nanorod; solar-driven photocatalysis; hydrogen evolution
资金
- National Natural Science Foundation of China [21376065, 51672073, 81302511, 81573134, 21106035]
- Natural Science Foundation of Heilongjiang Province [QC2012C001, QC2013C079, E201456]
- Heilongjiang Postdoctoral Startup Fund [LBH-Q14135]
- Program for New Century Excellent Talents in University of Heilongjiang Province [1253-NCET-020]
- University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province [UNPYSCT-2015014]
- Innovative Science Research Project of Harbin Medical University [2016JCZX13]
Ti3+ self-doped blue TiO2(B) single-crystalline nanorods (b-TR) are fabricated via a simple sol gelation method, cooperated with hydro-thermal treatment and subsequent in situ treatment method, and afterward annealed at 350 degrees C in Ar. The structures are characterized by X-ray diffraction (XRD), Raman, X-ray photoelectron spectroscopy (XPS), diffuse reflectance spectroscopy (UV-vis), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The prepared b-TR with narrow band gap possesses single-crystalline TiO2(B) phase, Ti3+ self-doping, and one-dimensional (1D) rodlike nanostructure. In addition, the improved photocatalytic performance is studied by decomposition of Rhodamine B (RhB) and hydrogen evolution. The degradation rate of RhB by Ti3+ self-doped blue TiO2(B) single-crystalline nanorods is similar to 6.9- and 2.1-times higher compared with the rates of titanium dioxide nanoparticles and pristine TiO2(B) nanorods under visible light illumination, respectively. The hydrogen evolution rate of b-TR is 26.6 times higher compared with that of titanium dioxide nanoparticles under AM 1.5 irradiation. The enhanced photocatalytic performances arise from the synergetic action of the special TiO2(B) phase, Ti3+ self-doping, and the 1D rod-shaped single-crystalline nanostructure, favoring the visible light utilization and the separation and transportation of photogenerated charge carriers.
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