Regulating surface band structure of anisotropic SrTiO3 via ultrathin TiO2 layer to promote spatial charge separation

doi:10.1016/j.cej.2025.160059

IMR OpenIR

	Regulating surface band structure of anisotropic SrTiO3 via ultrathin TiO2 layer to promote spatial charge separation
	Zhang, Shuting 1; Wang, Honghuo 2,3; Wu, Tingting 1; Chang, Wenjiao 1; Li, Yifan 1; Wang, Junying 1; Yang, Yongqiang 2; Wang, Lei 1
通讯作者	Wu, Tingting(ttwu@qust.edu.cn) ; Wang, Lei(inorchemwl@126.com)
	2025-03-01
发表期刊	CHEMICAL ENGINEERING JOURNAL
ISSN	1385-8947
卷号	507 页码:9
摘要	Anisotropic SrTiO3 (STO) photocatalysts with different facets exposure have attracted extensive attention in overall water splitting due to their promoted charge separation via the surface built-in electric field. However, the enlarged surface Schottky barrier of STO arising from the contacting with solution or cocatalyst in reaction inhibits the efficient carrier separation, leading to the low photocatalytic overall splitting performance. Herein, a surface modification strategy was explored to regulate the surface band structure of anisotropic STO by in-situ growing an ultrathin TiO2 layer on STO (STO/T) to form a core-shell structure with tight interface. Combining with the experimental and theoretical results, it is revealed that the ultrathin TiO2 layer can lower the surface Schottky barrier of anisotropic STO as a surface manipulation layer rather than heterojunction, thus enhancing the separation and migration of photo-generated carrier to participate in surface reactions. The photocatalytic performance of STO/T in overall water splitting exhibits 7.7 times enhancement compared to pure anisotropic STO. This work provides a promising pathway to promote carrier separation via regulating the surface band structure of photocatalysts to achieve high-performance overall water splitting.
关键词	Photocatalyst SrTiO3 Charge separation TiO 2 layer Overall water splitting
资助者	National Natural Science Foundation of China ; Natural Science Foundation of Shandong Province, China ; Taishan Scholar Young Talent Program
DOI	10.1016/j.cej.2025.160059
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52272222] ; National Natural Science Foundation of China[52072197] ; National Natural Science Foundation of China[52102272] ; Natural Science Foundation of Shandong Province, China[ZR2021QE063] ; Taishan Scholar Young Talent Program[tsqn201909114]
WOS研究方向	Engineering
WOS类目	Engineering, Environmental ; Engineering, Chemical
WOS记录号	WOS:001426128000001
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/180091
专题	中国科学院金属研究所
通讯作者	Wu, Tingting; Wang, Lei
作者单位	1.Qingdao Univ Sci & Technol, Coll Chem Engn, State Key Lab Base Ecochem Engn, Int Sci & Technol Cooperat Base Ecochem Engn & Gre, Qingdao 266042, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Shuting,Wang, Honghuo,Wu, Tingting,et al. Regulating surface band structure of anisotropic SrTiO3 via ultrathin TiO2 layer to promote spatial charge separation[J]. CHEMICAL ENGINEERING JOURNAL,2025,507:9.
APA	Zhang, Shuting.,Wang, Honghuo.,Wu, Tingting.,Chang, Wenjiao.,Li, Yifan.,...&Wang, Lei.(2025).Regulating surface band structure of anisotropic SrTiO3 via ultrathin TiO2 layer to promote spatial charge separation.CHEMICAL ENGINEERING JOURNAL,507,9.
MLA	Zhang, Shuting,et al."Regulating surface band structure of anisotropic SrTiO3 via ultrathin TiO2 layer to promote spatial charge separation".CHEMICAL ENGINEERING JOURNAL 507(2025):9.