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Selective Deposition of Silver Oxide on Single‐Domain Ferroelectric Nanoplates and Their Efficient Visible‐Light Photoactivity
Author(s) -
Chen Fang,
Ren Zhaohui,
Gong Siyu,
Li Xiang,
Shen Ge,
Han Gaorong
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201601456
Subject(s) - materials science , photodegradation , ferroelectricity , rhodamine b , photocatalysis , methyl orange , oxide , substrate (aquarium) , silver oxide , chemical engineering , photochemistry , polarization (electrochemistry) , nanocrystal , visible spectrum , nanotechnology , optoelectronics , chemistry , catalysis , dielectric , biochemistry , oceanography , engineering , metallurgy , geology
In this work, single‐crystal and single‐domain PbTiO 3 nanoplates are employed as substrates to prepare Ag 2 O/PbTiO 3 composite materials through a photodeposition method. It is revealed that silver oxide nanocrystals with an average size of 63 nm are selectively deposited on the positive polar surface of the ferroelectric substrate. The possible mechanism leading to the formation of silver oxide is that silver ions are first reduced to silver and then oxidized by oxygen generation. The composite shows an efficient photodegradation performance towards rhodamine B (RhB) and methyl orange (MO) under visible‐light irradiation. Such highly efficient photoactivity can be attributed to the ferroelectric polarization effect of the substrate, which promotes the separation of photogenerated electrons and holes at the interface.