title: Monolayered Bi2WO6 nanosheets mimicking heterojunction interface with open surfaces for photocatalysis.
abstract: Two-dimensional-layered heterojunctions have attracted extensive interest recently due to their exciting behaviours in electronic/optoelectronic devices as well as solar energy conversion systems. However, layered heterojunction materials, especially those made by stacking different monolayers together by strong chemical bonds rather than by weak van der Waal interactions, are still challenging to fabricate. Here the monolayer Bi2WO6 with a sandwich substructure of [BiO](+)-[WO4](2-)-[BiO](+) is reported. This material may be characterized as a layered heterojunction with different monolayer oxides held together by chemical bonds. Coordinatively unsaturated Bi atoms are present as active sites on the surface. On irradiation, holes are generated directly on the active surface layer and electrons in the middle layer, which leads to the outstanding performances of the monolayer material in solar energy conversion. Our work provides a general bottom-up route for designing and preparing novel monolayer materials with ultrafast charge separation and active surface.
authors.affiliation: State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China.
authors.forename: Yangen
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Department of Chemistry, Fuzhou University, Fuzhou 350108, China.|Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen 361005, China.
authors.forename: Yongfan
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China.
authors.forename: Mousheng
authors.initials: M
authors.lastname: Lin
authors.affiliation: State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China.
authors.forename: Jinlin
authors.identifier: http://orcid.org/0000-0002-3675-0941
authors.initials: J
authors.lastname: Long
authors.affiliation: State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China.
authors.forename: Zizhong
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China.
authors.forename: Huaxiang
authors.initials: H
authors.lastname: Lin
authors.affiliation: Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.
authors.forename: Jeffrey C-S
authors.initials: JC
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China.
authors.forename: Xuxu
authors.initials: X
authors.lastname: Wang