Black TiO2nanobelts/g-C3N4nanosheets Laminated Heterojunctions with Efficient Visible-Light-Driven Photocatalytic Performance.
Black TiO2nanobelts/g-C3N4nanosheets laminated heterojunctions (b-TiO2/g-C3N4) as visible-light-driven photocatalysts are fabricated through a simple hydrothermal-calcination process and an in-situ solid-state chemical reduction approach, followed by the mild thermal treatment (350 °C) in argon atmosphere. The prepared samples are evidently investigated by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, N2adsorption, and UV-visible diffuse reflectance spectroscopy, respectively. The results show that special laminated heterojunctions are formed between black TiO2nanobelts and g-C3N4nanosheets, which favor the separation of photogenerated electron-hole pairs. Furthermore, the presence of Ti3+and g-C3N4greatly enhance the absorption of visible light. The resultant b-TiO2/g-C3N4materials exhibit higher photocatalytic activity than that of g-C3N4, TiO2, b-TiO2and TiO2/g-C3N4for degradation of methyl orange (95%) and hydrogen evolution (555.8 μmol h-1g-1) under visible light irradiation. The apparent reaction rate constant (k) of b-TiO2/g-C3N4is ~9 times higher than that of pristine TiO2. Therefore, the high-efficient laminated heterojunction composites will have potential applications in fields of environment and energy.
Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P. R. China.
Liyan
L
Shen
Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P. R. China.
Zipeng
Z
Xing
Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P. R. China.
Jinlong
J
Zou
Department of Epidemiology and Biostatistics, Harbin Medical University, Harbin 150080, P. R. China.
Zhenzi
Z
Li
Department of Epidemiology and Biostatistics, Harbin Medical University, Harbin 150080, P. R. China.
Xiaoyan
X
Wu
Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P. R. China.
Yuchi
Y
Zhang
Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P. R. China.
Qi
Q
Zhu
Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P. R. China.
Shilin
S
Yang
Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P. R. China.
Wei
W
Zhou