Precisely dominating oxygen vacancy of Magneli phase titanium suboxides to efficiently remove quinolone antibiotics under visible light

doi:10.1016/j.seppur.2024.126626

IMR OpenIR

	Precisely dominating oxygen vacancy of Magneli phase titanium suboxides to efficiently remove quinolone antibiotics under visible light
	Luo, Meng Qi 1,2; Liu, Hui Jun 3; Yang, Ling Xu 3; Wang, Wen Jun 3; Zeng, Chao Liu 3
通讯作者	Liu, Hui Jun(hui_jun_liu@163.com) ; Zeng, Chao Liu(clzeng@imr.ac.cn)
	2024-08-09
发表期刊	SEPARATION AND PURIFICATION TECHNOLOGY
ISSN	1383-5866
卷号	341 页码:13
摘要	Oxygen vacancy modulation is often applied to the modification of photocatalysts as a typical technique that affects the electronic structure, light absorption properties, and surface adsorption properties of semiconductor materials. Titanium suboxide, a titanium oxide rich in oxygen vacancies, is hardly ever used for photocatalytic degradation due to the difficulty of obtaining a single phase. In this study, the Magneli phases Ti4O7 and Ti3O5 were used as novel photocatalysts exhibiting effective photodegradation of quinolone antibiotics. The removal rate of levofloxacin (LEV) by visible light irradiation of Ti4O7 and Ti3O5 reached 91.2 % and 87.3 %, superior to most of the titanium oxide photocatalysts reported in the literature, whereas the P25 presented a decomposition rate of 13.0 %. This prominent effect is attributed to the contribution of oxygen vacancies extending the light response range and enhancing the separation efficiency of photogenerated carriers. Meanwhile, oxygen vacancies as electron trapping centers also reduce the recombination of photogenerated electron -hole pairs and enable the generation of superoxide radicals, which dominate photocatalysis. The reaction pathways and reusability of Ti4O7 photocatalysts for mineralization of LEV were further analyzed. The visible photocatalysis of P25 by photosensitization, which is different from the photocatalytic mechanism of titanium suboxide, was also verified. This work certifies that titanium suboxide materials have promising applications in photocatalysis.
关键词	Photocatalysis Degradation mechanism Oxygen vacancies Visible light
资助者	National Natural Science Foundation of China
DOI	10.1016/j.seppur.2024.126626
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51501205]
WOS研究方向	Engineering
WOS类目	Engineering, Chemical
WOS记录号	WOS:001207895400001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/185695
专题	中国科学院金属研究所
通讯作者	Liu, Hui Jun; Zeng, Chao Liu
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Songshan Lake Mat Lab, Dongguan 523808, Peoples R China
推荐引用方式 GB/T 7714	Luo, Meng Qi,Liu, Hui Jun,Yang, Ling Xu,et al. Precisely dominating oxygen vacancy of Magneli phase titanium suboxides to efficiently remove quinolone antibiotics under visible light[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2024,341:13.
APA	Luo, Meng Qi,Liu, Hui Jun,Yang, Ling Xu,Wang, Wen Jun,&Zeng, Chao Liu.(2024).Precisely dominating oxygen vacancy of Magneli phase titanium suboxides to efficiently remove quinolone antibiotics under visible light.SEPARATION AND PURIFICATION TECHNOLOGY,341,13.
MLA	Luo, Meng Qi,et al."Precisely dominating oxygen vacancy of Magneli phase titanium suboxides to efficiently remove quinolone antibiotics under visible light".SEPARATION AND PURIFICATION TECHNOLOGY 341(2024):13.