High-pressure bandgap engineering and amorphization in TiNb2O7 single crystals

被引：5

作者：

Jia, Shufan ^{[1
]}

Zhou, Qiang ^{[1
]}

Li, Fangfei ^{[1
]}

Hu, Yuxin ^{[1
,2
]}

Wang, Chenning ^{[1
]}

Wang, Xiaohan ^{[1
]}

He, Songying ^{[1
]}

Li, Xinyang ^{[1
]}

Li, Liang ^{[1
]}

Cui, Tian ^{[1
,3
]}

机构：

[1] Jilin Univ, Coll Phys, State Key Lab Superhard Mat, Changchun 130000, Peoples R China

[2] UCAS, Hangzhou Inst Adv Study, Hangzhou 310024, Peoples R China

[3] Ningbo Univ, Sch Phys Sci & Technol, Ningbo 315211, Peoples R China

来源：

CRYSTENGCOMM | 2022年 / 24卷 / 14期

基金：

中国国家自然科学基金;

关键词：

NEGATIVE THERMAL-EXPANSION; OPTICAL-PROPERTIES; TITANIUM NIOBATE; PHASE; ABSORPTION; BEHAVIOR;

D O I：

10.1039/d2ce00168c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Titanium niobate (TiNb2O7) possesses excellent photocatalytic properties, dielectric properties, and lithium-insertion capacity. High-pressure (HP) treatment is a powerful tool for bandgap engineering aiming at widening its applications. Herein, we report the growth of TiNb2O7 single crystals by the optical floating zone (OFZ) method and the engineering of the TiNb2O7 bandgap via HP. To obtain the physical mechanism of the bandgap variation under HP, the detailed pressure-dependent properties and structure information have been characterized by using in situ Raman spectroscopy and angle dispersive synchrotron radiation X-ray diffraction (ADXRD). During compression, the TiNb2O7 crystals were amorphized and the amorphized phase was maintained under ambient conditions. The microstructures of the uncompressed crystalline and decompressed amorphized samples have also been investigated accordingly.

引用

页码：2660 / 2666

页数：7

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