Journal
APPLIED SURFACE SCIENCE
Volume 358, Issue -, Pages 479-484Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2015.08.051
Keywords
Oxygen vacancies; Cu@TiO2; Core shell; Photocatalytic activity
Categories
Funding
- National Nature Science Foundation of China [21173261]
- CAS/SAFEA International Partnership Program for Creative Research Teams
- CAS Cross-Cooperation Program for Creative Research Teams
- CAS Western Action Plan [KGZD-EW-502]
- Western Light of Chinese Academy of Sciences [XBBS 201126]
- Youth Technology Innovation Talents Culture Engineering of Xinjiang Uygur Autonomous Region of China [2013721045]
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Cu@TiO2 core-shell nanoparticles with different mass ratios of Cu to TiO2 were facilely synthesized via wet chemical approaches, and were characterized by transmission electron microscopy, scanning electron microscopy, UV-vis diffuse reflection absorption spectroscopy, X-ray photoelectron spectroscopy and electron paramagnetic resonance. The photocatalytic efficiency of Cu@TiO2 nanoparticles was evaluated by degradation of 2,4-dichlorophenol, a typical persistent organic pollutant, under visible light irradiation. The results show that the oxygen vacancy creation obviously enhances the visible-light absorption of TiO2. Meanwhile, the Cu nanoparticle incorporation into the TiO2 can effectively improve charge-separation efficiency of Cu@TiO2 under visible-light irradiation, thereby enhancing the photoactivity. (C) 2015 Elsevier B.V. All rights reserved.
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