Nb-doped coherent TiO2/LaAlO3 interfaces: Segregation mechanism and improved photocatalytic performance

doi:10.1016/j.actamat.2024.120504

IMR OpenIR

	Nb-doped coherent TiO2/LaAlO3 interfaces: Segregation mechanism and improved photocatalytic performance
	Li, Xiang 1,2; Jiang, Yixiao 1,2; Jin, Qianqian 3; Qin, Fei 1,2; Yao, Tingting 1,2; Tao, Ang 1,2; Yan, Xuexi 1,2; Gao, Chunyang 1,2; Yang, Zhiqing 4; Chen, Chunlin 1,2; Liu, Gang 1,2; Ma, Xiu-Liang 4,5; Ye, Hengqiang 6
通讯作者	Yao, Tingting(ttyao11s@imr.ac.cn) ; Chen, Chunlin(clchen@imr.ac.cn) ; Liu, Gang(gangliu@imr.ac.cn)
	2025
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	282 页码:11
摘要	Elemental doping at coherent interfaces is very difficult and rarely used to improve the interfacial properties since coherent interfaces have low interfacial energies and lack open space for trapping dopant atoms. Exploring universally applicable strategies for elemental doping at coherent interfaces represents an important progress in interface science and engineering. In this study, Nb atoms are successfully doped at coherent (001) LaAlO3/ anatase-TiO2 interfaces, which enhances greatly the efficiency of photocatalytic hydrogen production from water. Transmission electron microscopy investigations reveal that both LaO- terminated and AlO2-terminated LaAlO3/anatase-TiO2 interfaces can trap two layers of Nb atoms, which accompanies with the formation of La vacancies between them. First-principles calculations suggest that Nb atoms segregate at the interfaces under the action of potential gradient, which increases significantly the strength of the built-in electric field in TiO2, thereby facilitating the separation of photogenerated carriers and improving the photocatalytic performance. The H2 production of the Nb doped coherent interface is about 4 times that of the pristine coherent interface. Since potential gradient widely exists at various interfaces including the coherent ones, elemental doping by potential gradient should be an universally applicable fabrication method for tuning the properties of interfaces and heterostructures.
关键词	Coherent interfaces Elemental doping Photocatalytic Transmission electron microscopy First-principles calculations TiO2
资助者	National Natural Science Foundation of China ; Ji Hua Laboratory Project ; Guangdong Major Project of Basic Research
DOI	10.1016/j.actamat.2024.120504
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52125101] ; National Natural Science Foundation of China[52271015] ; Ji Hua Laboratory Project[X210141TL210] ; Guangdong Major Project of Basic Research[2021B0301030003]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001349666500001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/191320
专题	中国科学院金属研究所
通讯作者	Yao, Tingting; Chen, Chunlin; Liu, Gang
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Guangxi Univ Sci & Technol, Ctr Struct Adv Matter, Sch Elect Engn, Liuzhou 545006, Peoples R China 4.Bay Area Ctr Electron Microscopy, Songshan Lake Mat Lab, Dongguan 523808, Peoples R China 5.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China 6.Jihua Lab, Foshan 528251, Peoples R China
推荐引用方式 GB/T 7714	Li, Xiang,Jiang, Yixiao,Jin, Qianqian,et al. Nb-doped coherent TiO2/LaAlO3 interfaces: Segregation mechanism and improved photocatalytic performance[J]. ACTA MATERIALIA,2025,282:11.
APA	Li, Xiang.,Jiang, Yixiao.,Jin, Qianqian.,Qin, Fei.,Yao, Tingting.,...&Ye, Hengqiang.(2025).Nb-doped coherent TiO2/LaAlO3 interfaces: Segregation mechanism and improved photocatalytic performance.ACTA MATERIALIA,282,11.
MLA	Li, Xiang,et al."Nb-doped coherent TiO2/LaAlO3 interfaces: Segregation mechanism and improved photocatalytic performance".ACTA MATERIALIA 282(2025):11.