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Facile Synthesis of Cu Quantum Dots‐TiO 2 Nanosheets Schottky Junction and Improved Photocatalytic Degradation Activity
Author(s) -
Zhai Siyu,
Yang Xiaoman,
Tang Maoyuan,
Gu Wenhao,
Teng F.
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202000377
Subject(s) - photocatalysis , materials science , nanosheet , quantum dot , schottky barrier , degradation (telecommunications) , chemical engineering , surface photovoltage , nanotechnology , irradiation , schottky diode , photochemistry , optoelectronics , catalysis , chemistry , electronic engineering , diode , nuclear physics , engineering , biochemistry , physics , quantum mechanics , spectroscopy
Cu quantum dots (CuQDs), which are about 2–4‐nm large, are successfully loaded on the surface of TiO 2 nanosheet by a mild and simple method. Under UV light irradiation (λ≤400 nm), CuQDs (10 wt %)‐TiO 2 shows a photocatalytic activity 1.9 times higher than TiO 2 for the degradation of RhB, although with a lower surface area than TiO 2 . The trapping experiment shows that the main oxidation species is . O 2− , which due to the obvious electron migration from TiO 2 to CuQDs. The CuQDs loading efficiently improves the photocatalytic activity of CuQDs‐TiO 2 , which is mainly ascribed to the enhanced charge transfer and separation efficiency by the formation of Schottky junction between CuQDs and TiO 2 .