Defect-Modified Ultrathin BiOX (X = Cl, Br) Nanosheets Via a Top-Down Approach with Effective Visible-Light Photocatalytic Degradation

doi:10.1021/acs.jpcc.1c02950

	Defect-Modified Ultrathin BiOX (X = Cl, Br) Nanosheets Via a Top-Down Approach with Effective Visible-Light Photocatalytic Degradation
	Yuan, Qinglin 1,2,3,4; Wei, Shuxian 2,3; Hu, Taiping 2,3,4; Ye, Yixing 2,3; Cai, Yunyu 2,3; Liu, Jun 2,3; Li, Pengfei 2,3; Liang, Changhao 2,3,4
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2021-09-02
卷号	125
ISSN号	1932-7447
DOI	10.1021/acs.jpcc.1c02950
通讯作者	Li, Pengfei(pfli@issp.ac.cn) ; Liang, Changhao(chliang@issp.ac.cn)
英文摘要	Resizing and engineering defects of two-dimensional (2D) layered semiconductors is of considerable importance for improving their photocatalytic performance. We, herein, report first a top-down strategy for synthesizing ultrathin BiOX (X = Cl, Br) nanosheets (NSs) with reducing size and engineering surface oxygen vacancies simultaneously, which is known as laser irradiation in liquid technique. The oxygen vacancies are spontaneously introduced during the regrowth of broken BiOX molecules and ions into ultrathin nanosheets. The electronic structure calculations reveal the alteration of the electronic structure induced by surface oxygen vacancies, which is well consistent with UV-vis absorption spectra. The further formation energy calculations suggest that the surface oxygen vacancies are abundant even under an O-rich condition. Importantly, the engineered ultrathin BiOX NSs exhibit excellent visible-light photocatalytic performances on the degradation of rhodamine B (RhB). Detailed investigations attribute the excellent performance mainly to the surface oxygen vacancies. On the one hand, it captures O-2 molecules as reactive oxygen species (O-center dot(2)-). On the other hand, it modulates the electronic structure of ultrathin BiOX NSs, leading to the promotion of visible-light absorption and enhancement of the oxidation ability of holes. Our strategy opens up a new pathway to engineer structures and defects of 2D layered nanomaterials, which, in turn, could encourage potential applications.
资助项目	National Natural Science Foundation of China (NSFC)[11604320] ; National Natural Science Foundation of China (NSFC)[51571186] ; National Natural Science Foundation of China (NSFC)[51971211] ; Key Research and Development Program of Anhui Province[201904a05020049] ; China Postdoctoral Science Foundation[2020M681293] ; China Postdoctoral Science Foundation[2020TQ0189]
WOS关键词	MOLECULAR-OXYGEN ACTIVATION ; OPTICAL-PROPERTIES ; 001 FACETS ; NANOPARTICLES ; PLASMON ; FRAGMENTATION ; OXIDATION ; LIQUID ; CO2
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000693413400009
资助机构	National Natural Science Foundation of China (NSFC) ; Key Research and Development Program of Anhui Province ; China Postdoctoral Science Foundation
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/125353]
专题	中国科学院合肥物质科学研究院
通讯作者	Li, Pengfei; Liang, Changhao
作者单位	1.Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai 200240, Peoples R China 2.Chinese Acad Sci, Inst Solid State Phys, Hefei Inst Phys Sci, Key Lab Mat Phys, Hefei 230031, Peoples R China 3.Chinese Acad Sci, Inst Solid State Phys, Hefei Inst Phys Sci, Anhui Key Lab Nanomat & Nanotechnol, Hefei 230031, Peoples R China 4.Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Yuan, Qinglin,Wei, Shuxian,Hu, Taiping,et al. Defect-Modified Ultrathin BiOX (X = Cl, Br) Nanosheets Via a Top-Down Approach with Effective Visible-Light Photocatalytic Degradation[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2021,125.
APA	Yuan, Qinglin.,Wei, Shuxian.,Hu, Taiping.,Ye, Yixing.,Cai, Yunyu.,...&Liang, Changhao.(2021).Defect-Modified Ultrathin BiOX (X = Cl, Br) Nanosheets Via a Top-Down Approach with Effective Visible-Light Photocatalytic Degradation.JOURNAL OF PHYSICAL CHEMISTRY C,125.
MLA	Yuan, Qinglin,et al."Defect-Modified Ultrathin BiOX (X = Cl, Br) Nanosheets Via a Top-Down Approach with Effective Visible-Light Photocatalytic Degradation".JOURNAL OF PHYSICAL CHEMISTRY C 125(2021).