title: Selective Deposition of Silver Oxide on Single-Domain Ferroelectric Nanoplates and Their Efficient Visible-Light Photoactivity.
abstract: In this work, single-crystal and single-domain PbTiO3 nanoplates are employed as substrates to prepare Ag2 O/PbTiO3 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.
authors.affiliation: State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Cyrus Tang Center for Sensor Materials and Application, Zhejiang University, Hangzhou, 310027, P. R. China.
authors.forename: Fang
authors.initials: F
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Cyrus Tang Center for Sensor Materials and Application, Zhejiang University, Hangzhou, 310027, P. R. China. renzh@zju.edu.cn.|State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Cyrus Tang Center for Sensor Materials and Application, Zhejiang University, Hangzhou, 310027, P. R. China. renzh@zju.edu.cn.
authors.forename: Zhaohui
authors.initials: Z
authors.lastname: Ren
authors.affiliation: State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Cyrus Tang Center for Sensor Materials and Application, Zhejiang University, Hangzhou, 310027, P. R. China.
authors.forename: Siyu
authors.initials: S
authors.lastname: Gong
authors.affiliation: State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Cyrus Tang Center for Sensor Materials and Application, Zhejiang University, Hangzhou, 310027, P. R. China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Li
authors.affiliation: State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Cyrus Tang Center for Sensor Materials and Application, Zhejiang University, Hangzhou, 310027, P. R. China.
authors.forename: Ge
authors.initials: G
authors.lastname: Shen
authors.affiliation: State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Cyrus Tang Center for Sensor Materials and Application, Zhejiang University, Hangzhou, 310027, P. R. China.
authors.forename: Gaorong
authors.initials: G
authors.lastname: Han
keywords: ferroelectric polarization; photocatalysis; selective growth; silver oxide; surface chemistry