Oxygen vacancy-rich 2D/2D BiOCl-g-C3N4 ultrathin heterostructure nanosheets for enhanced visible-light-driven photocatalytic activity in environmental remediation

doi:10.1016/j.apcatb.2017.08.049

	Oxygen vacancy-rich 2D/2D BiOCl-g-C3N4 ultrathin heterostructure nanosheets for enhanced visible-light-driven photocatalytic activity in environmental remediation
	Wang, Q; Liu, DM; Zhong, LL; Cui, FY; Cao, XZ; Cao XZ(曹兴忠); Wang, W
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2018
卷号	220 页码:290-302
关键词	Oxygen vacancy 2D/2D heterostructure Ultrathin nanosheets Photocatalysis
ISSN号	0926-3373
DOI	10.1016/j.apcatb.2017.08.049
文献子类	Article
英文摘要	Photocatalytic degradation has been unearthed as a promising strategy for environmental remediation, and the calling is endless for more efficient photocatalytic system. In this study, a novel oxygen vacancy-rich two-dimensional/two-dimensional (2D/2D) BiOCl-g-C3N4 ultrathin heterostructure nanosheet (CN-BC) is successfully prepared by a facile solvothermal method for degradation of non-dye organic contaminants. HRTEM observes the formation of heterojunction, while ESR and)CPS unveil the distinct oxygen vacancy concentrations. Density functional calculations reveal that the introduction of oxygen vacancies (OVs) brings a new defect level, resulting in the increased photoabsorption. Under visible light irradiation, the OVs-rich optimum ratio of CN-BC (50CN-50BC) Exhibits 95% removal efficiency of 4-chlorophenol within 2 h, which is about 12.5, 5.3 and 3.4 times as that of pure BiOCl, g-C3N4 and OVs-poor heterostructure, respectively. The photocatalytic mechanism of OVs-rich 50CN-50BC is also revealed, suggesting that the synergistic effect between 2D/2D heterojunction and oxygen vacancies greatly promotes visible-light photoabsorption and photoinduced carrier separation efficiency with a prolonged lifetime, which is confirmed by multiple optical and electrochemical analyses, including DRS, steady-state photoluminescence spectra, electrochemical impedance spectroscopy, photocurrent response and time-resolved fluorescence spectra. This study could bring new opportunities for the rational design of highly efficient photocatalysts by combining 2D/2D heterojunctions with oxygen vacancies in environmental re mediation.
电子版国际标准刊号	1873-3883
WOS关键词	GRAPHITIC CARBON NITRIDE ; SINGLE-CRYSTALLINE NANOSHEETS ; EXPOSED 001 FACETS ; EFFICIENT DEGRADATION ; BISMUTH OXYHALIDES ; HYDROGEN EVOLUTION ; NITROGEN-FIXATION ; BIOCL NANOSHEETS ; H-2 EVOLUTION ; WATER
WOS研究方向	Chemistry ; Engineering
语种	英语
WOS记录号	WOS:000412957200028
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285492]
专题	高能物理研究所_实验物理中心高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Wang, Q,Liu, DM,Zhong, LL,et al. Oxygen vacancy-rich 2D/2D BiOCl-g-C3N4 ultrathin heterostructure nanosheets for enhanced visible-light-driven photocatalytic activity in environmental remediation[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2018,220:290-302.
APA	Wang, Q.,Liu, DM.,Zhong, LL.,Cui, FY.,Cao, XZ.,...&Wang, W.(2018).Oxygen vacancy-rich 2D/2D BiOCl-g-C3N4 ultrathin heterostructure nanosheets for enhanced visible-light-driven photocatalytic activity in environmental remediation.APPLIED CATALYSIS B-ENVIRONMENTAL,220,290-302.
MLA	Wang, Q,et al."Oxygen vacancy-rich 2D/2D BiOCl-g-C3N4 ultrathin heterostructure nanosheets for enhanced visible-light-driven photocatalytic activity in environmental remediation".APPLIED CATALYSIS B-ENVIRONMENTAL 220(2018):290-302.