Length Lewis acid Fe3+ in TiO2 ultra-thin nanosheet boosts oxygen species activation

doi:10.1016/j.apsusc.2022.154433

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	Length Lewis acid Fe3+ in TiO2 ultra-thin nanosheet boosts oxygen species activation
	Ou, Yujing 1; Zhao, Dan 1; Jin, Xingzhi 1; Hu, Zhao 2; Wang, Yi 1; Li, Chunlei 1; Zheng, Yi 1
刊名	APPLIED SURFACE SCIENCE
	2022-11-30
卷号	603
关键词	Lewis acid site Oxygen species activation Fe3+ TiO2
ISSN号	0169-4332
DOI	10.1016/j.apsusc.2022.154433
英文摘要	Breaking the bottleneck of the light absorption, photocarriers transmission and separation (PTS), and surface reactions efficiency of photocatalysis is hot topic. For this, the Fe3+ acted as Lewis acid site is successfully built in TiO2 ultra-thin nanosheet (FT) through hydrothermal method. The detailed effect of Lewis acid site is systematically studied. Based on DFT, in-situ XPS, O-2 TPD, CV, hole transfer efficiency (eta trans) and ESR, Lewis acid of Fe3+ acts as a photo-generated electron trapped site, and the imbalance of charge by the construction of Lewis acid, which makes the O-2 reduction process more easily occurs on Ti-4(+) (adjacent to the Lewis acid site) as well as Lewis acid site itself. Meanwhile, the oxygen defect (OD) near Lewis acid site promotes the adsorption, activation and oxidation of H2O. The photo-redox reaction is simultaneously accomplished around the Lewis acid site, which is the PTS driving force of photocarriers. The photocurrent density of 5% FT is 4 to 5 times higher than intrinsic one (T), and Lewis acid site of Fe3+ leads to the reduction of interfacial resistance due to lower the activation energy of redox process. As result, FT displays higher photocatalytic activity than T.
WOS研究方向	Chemistry ; Materials Science ; Physics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000848601100002
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/159824]
专题	石油化工学院
作者单位	1.Lanzhou Univ Technol, Sch Petrochem Engn, Lanzhou 730050, Peoples R China; 2.South Cent Univ Natl, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Ou, Yujing,Zhao, Dan,Jin, Xingzhi,et al. Length Lewis acid Fe3+ in TiO2 ultra-thin nanosheet boosts oxygen species activation[J]. APPLIED SURFACE SCIENCE,2022,603.
APA	Ou, Yujing.,Zhao, Dan.,Jin, Xingzhi.,Hu, Zhao.,Wang, Yi.,...&Zheng, Yi.(2022).Length Lewis acid Fe3+ in TiO2 ultra-thin nanosheet boosts oxygen species activation.APPLIED SURFACE SCIENCE,603.
MLA	Ou, Yujing,et al."Length Lewis acid Fe3+ in TiO2 ultra-thin nanosheet boosts oxygen species activation".APPLIED SURFACE SCIENCE 603(2022).