Tuning the structural distortion and visible-light-driven photocatalytic properties of LaCoO3 thin films by epitaxial strain
Tuning the structural distortion and visible-light-driven photocatalytic properties of LaCoO3 thin films by epitaxial strain
复制标题
通过外延应变调节 LaCoO3 薄膜的结构畸变和可见光驱动的光催化性能
DOI：
10.1016/j.jallcom.2018.11.048
复制
发表时间：
2019-03
影响因子：
6.2
通讯作者：
霍冀川
中科院分区：
文献类型：
--
作者：
刘海峰;张艳苹;张行泉;陈浩;谢瑞士;郑奎;吴小玉;霍冀川
Perovskite-type LaCoO3thin films were deposited on (001) oriented LaSrAlO4, LaAlO3, (LaAlO3)0.3(Sr2AlTaO6)0.7and SrTiO3single-crystal substrates, respectively. All the films are epitaxially grown on these substrates with tetragonal distortion of CoO6octahedrons. Due to different lattice mismatch between the film and substrate, there exists Jahn-Teller-like tetragonal distortion with out-of-plane elongated CoO6octahedrons for LaCoO3on LaSrAlO4or LaAlO3substrate, but compressed octahedrons for LaCoO3on (LaAlO3)0.3(Sr2AlTaO6)0.7or SrTiO3. All the LaCoO3epitaxial films, with strain-induced larger unit-cell sizes and longer Cosingle bondO bond lengths compared with those of bulk LaCoO3, exhibit obvious visible-light-driven photocatalytic activity. The photocatalytic ability increases gradually for the LaCoO3grown on (LaAlO3)0.3(Sr2AlTaO6)0.7, SrTiO3, LaAlO3and LaSrAlO4, consistent with the increasing order of tetragonal distortion degree for CoO6octahedrons. It reveals that the photocatalytic performance of the LaCoO3films is closely related to the stain-induce tetragonal distortion of CoO6octahedrons. Larger degree of tetragonal distortion can further reduce the crystal field splitting energy of CoO6octahedrons as well as the band gap, thus enhancing the visible-light-driven photocatalytic ability of LaCoO3. The present study demonstrates that epitaxial strain is an efficient way to controllably tune the structural distortion, electronic structure, and thereby improve the photocatalytic properties of perovskite and perovskite-derived oxides.
登录
查看更多内容
影响因子：
3.7
作者：
G. Sterbinsky;P. Ryan;Jaeyoun Kim;E. Karapetrova;Jie Ma;Jing Shi;J. Woicik
通讯作者：
G. Sterbinsky;P. Ryan;Jaeyoun Kim;E. Karapetrova;Jie Ma;Jing Shi;J. Woicik
影响因子：
5.2
作者：
Souza, Isis P. A. F.;Pezoti, Osvaldo;Almeida, Vitor C.
通讯作者：
Almeida, Vitor C.
影响因子：
10.9
作者：
Boningari, Thirupathi;Inturi, Siva Nagi Reddy;Smirniotis, Panagiotis G.
通讯作者：
Smirniotis, Panagiotis G.
影响因子：
8.6
作者：
Yuichi Yokoyama;Yuichi Yamasaki;Yuichi Yamasaki;Yuichi Yamasaki;M. Taguchi;Y. Hirata;K. Takubo;Jun Miyawaki;Y. Harada;Daisuke Asakura;Jun Fujioka;Masao Nakamura;H. Daimon;Masashi Kawasaki;Masashi Kawasaki;Y. Tokura;Y. Tokura;H. Wadati
通讯作者：
Yuichi Yokoyama;Yuichi Yamasaki;Yuichi Yamasaki;Yuichi Yamasaki;M. Taguchi;Y. Hirata;K. Takubo;Jun Miyawaki;Y. Harada;Daisuke Asakura;Jun Fujioka;Masao Nakamura;H. Daimon;Masashi Kawasaki;Masashi Kawasaki;Y. Tokura;Y. Tokura;H. Wadati
影响因子：
6.2
作者：
Liu, Haifeng;Shi, Lei;Li, Yang
通讯作者：
Li, Yang