Solution chemistry quasi-epitaxial growth of atomic CaTiO_(3)perovskite layers to stabilize and passivate TiO_(2)photoelectrodes for efficient water splitting  

作　　者：Ning Wei Yuetian Chen Xingtao Wang Miao Kan Taiyang Zhang Yixin Zhao 

机构地区：[1]Frontiers Science Center for Transformative Molecules,School of Environmental Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [2]Shanghai Institute of Pollution Control and Ecological Security,Shanghai 200240,China

出　　处：《Fundamental Research》2023年第6期918-925,共8页自然科学基础研究（英文版）

基　　金：the Key Project of Intergovernmental International Scientific and Technological Innovation Cooperation(2017YFE0127100);the NSFC(22025505);the Program of Shanghai Academic/Technology Research Leader(20XD1422200);the Cultivating Fund of the Frontiers Science Center for Transformative Molecules(2019PT02).

摘　　要：Perovskite oxides with unique crystal structures and high defect tolerance are promising as atomic surface passivation layers for photoelectrodes for efficient and stable water splitting.However,controllably depositing and crystalizing perovskite-type metal oxides at the atomic level remains challenging,as they usually crystalize at higher temperatures than regular metal oxides.Here,we report a mild solution chemistry approach for the quasi-epitaxial growth of an atomic CaTiO_(3)perovskite layer on rutile TiO_(2)nanorod arrays.The high-temperature crystallization of CaTiO_(3)perovskite is overcome by a sequential hydrothermal conversion of the atomic amorphous TiOx layer to CaTiO_(3)perovskite.The atomic quasi-epitaxial CaTiO_(3)layer passivated TiO_(2)nanorod arrays exhibit more efficient interface charge transfer and high photoelectrochemical performance for water splitting.Such a mild solution-based approach for the quasi-epitaxial growth of atomic metal oxide perovskite layers could be a promising strategy for both fabricating atomic perovskite layers and improving their photoelectrochemical properties.

关 键 词：Solution atomic layer deposition CaTiO_(3)/TiO_(2) Quasi-epitaxial growth In-situ surface passivation Photoelectrochemical water splitting 

分 类 号：O61[理学—无机化学]