Array of single crystalline anatase TiO2 nanotubes with significant enhancement of photoresponse

作     者：Lvchao Qiu Ke Fang Yubo Li Shutao Huang Guanxing Li Songda Li Hu He Wentao Yuan Hangsheng Yang Wei Tian Yong Wang Lvchao Qiu;Ke Fang;Yubo Li;Shutao Huang;Guanxing Li;Songda Li;Hu He;Wentao Yuan;Hangsheng Yang;Wei Tian;Yong Wang

作者机构：State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Center of Electron Microscopy School of Materials Science and Engineering Zhejiang University Key Laboratory of Micro-Nano Electronic Device and Smart System of Zhejiang Province College of Information Science & Electronic Engineering Zhejiang University School of Physical Science and Technology Soochow University 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2021年第31卷第4期

页      面：536-540页

核心收录：

学科分类：081702[工学-化学工艺] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070205[理学-凝聚态物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by the Zhejiang Provincial Natural Science Foundation of China (LD19B030001, Z4080070) National Natural Science Foundation of China (51872260, 52025011, 51801182, and 51971202) China Postdoctoral Science Foundation (2020T130578, 2020M671714) 

主　　题：Single crystalline TiO 2 nanotube Crystallization temperature gradient Photo response Photocatalysis 

摘      要：Anatase TiO2nanotubes array(ATONA) has attracted tremendous attention owing to its promising applications in solar cells, water splitting and organic pollutants photocatalytic degradation. However, the activity of ATONAs was greatly suppressed by the grain boundaries existed in the tube walls, which acted as carrier scattering and recombination centers. Herein, we report a novel strategy to prepare array of single crystalline anatase TiO2nanotubes(SC-ATONAs) with significant enhancement of the photocatalytic activity and UV photo response performance compared to the polycrystalline counterparts. The growth of SC-ATONAs was achieved by establishing a crystallization temperature gradient along the tube wall, which ensured the crystallization started from the nucleation of a single nucleus at the bottom of amorphous TiO2nanotubes prepared by Ti anodization. These findings pave the way to prepare single-crystalline nanotubes with superior performance for other materials.