期刊
RSC ADVANCES
卷 6, 期 75, 页码 70978-70983出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra11341a
关键词
-
资金
- National Natural Science Foundation of China [50672069]
- Nanotechnology Special foundation of Shanghai [11 nm0500700]
Cu2O flake and particle modified 3D-TiO2 nanotube arrays (TiO2 NTAs) on flexible Ti meshes were prepared by electrochemical deposition. The phase composition, microstructure and photo-electrochemical property were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), UV-vis diffusion reflection spectroscopy (DRS) and an electrochemical system. The results indicate that 3D-TiO2 NTAs are covered by a large number of Cu2O flakes and nanoparticles, and the flakes become longer and narrower with increasing electrochemical cycles. Cu2O modified 3D-TiO2 NTAs expand the photo-response range from ultraviolet light to visible light. The Cu2O modified NTAs with 400 pulses possess the highest visible photocurrent density of 0.9 mA cm(-2), however, the Cu2O modified NTAs with 600 pulses possess the largest photocatalytic activity toward degradation of methyl orange (MO) under visible-light irradiation. A mechanism is proposed to explain the difference in photocurrent response and photocatalytic activity.
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