Surface-disorder-engineering-induced enhancement in the photocatalytic activity of Bi4Ti3O12 nanosheets

doi:10.5004/dwt.2019.23710

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	Surface-disorder-engineering-induced enhancement in the photocatalytic activity of Bi4Ti3O12 nanosheets
	Zhao, Xinxin 1,2; Yang, Hua 1,2; Zhang, Haimin 2; Cui, Ziming 2; Feng, Wangjun 2
刊名	DESALINATION AND WATER TREATMENT
	2019-03
卷号	145 页码:326-336
关键词	Bi4Ti3O12 nanosheets Surface disorder engineering Surface defect states Photocatalytic RhB degradation Photocatalytic mechanism
ISSN号	1944-3994
DOI	10.5004/dwt.2019.23710
英文摘要	NaBH4 reduction method has been used to create surface disorder on Bi4Ti3O12 nanosheets with the aim of enhancing their photocatalytic activity. The NaBH4-treated Bi4Ti3O12 samples were systematically investigated by XRD, TEM, BET, XPS, UV-vis DRS, EIS and transient photocurrent response. It is disclosed that disordered surface layer associated with oxygen vacancy defects is obviously formed on the surface of Bi4Ti3O12 nanosheets, and simultaneously surface defect states are introduced in the forbidden gap of Bi4Ti3O12. The NaBH4-treated Bi4Ti3O12 samples display enhanced visible-light absorption. The photocatalytic performance of the samples was investigated by the degradation of RhB under irradiation of simulated sunlight, UV light and visible light. It is found that the NaBH4 treated Bi4Ti3O12 samples exhibit a significantly enhanced photocatalytic activity under UV irradiation. The sample treated at 0.1 M NaBH4 solution shows the highest UV photocatalytic activity, about 1.9 times higher than that of pristine Bi4Ti3O12. This is ascribed to the fact that the induced surface defect states can act as electron acceptors and thus facilitates the separation of photogenerated electron-hole pairs. Moreover, the NaBH4-treated Bi4Ti3O12 samples also display a slightly enhanced photocatalytic performance under visible light irradiation, which is due to the enhanced visible light absorption induced by the surface defect states.
资助项目	National Natural Science Foundation of China[51662027]
WOS研究方向	Engineering ; Water Resources
语种	英语
出版者	DESALINATION PUBL
WOS记录号	WOS:000458914500032
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32047]
专题	理学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Yang, Hua
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Xinxin,Yang, Hua,Zhang, Haimin,et al. Surface-disorder-engineering-induced enhancement in the photocatalytic activity of Bi4Ti3O12 nanosheets[J]. DESALINATION AND WATER TREATMENT,2019,145:326-336.
APA	Zhao, Xinxin,Yang, Hua,Zhang, Haimin,Cui, Ziming,&Feng, Wangjun.(2019).Surface-disorder-engineering-induced enhancement in the photocatalytic activity of Bi4Ti3O12 nanosheets.DESALINATION AND WATER TREATMENT,145,326-336.
MLA	Zhao, Xinxin,et al."Surface-disorder-engineering-induced enhancement in the photocatalytic activity of Bi4Ti3O12 nanosheets".DESALINATION AND WATER TREATMENT 145(2019):326-336.