Fabrication of Two‐Dimensional Lateral Heterostructures of WS2/WO3⋅H2O Through Selective Oxidation of Monolayer WS2. Issue 50 (23rd October 2015)

• Record Type: Journal Article
• Authors: Zhou, Pengshang; Xu, Qun; Li, Hongxiang; Wang, Yun; Yan, Bo; Zhou, Yunchun; Chen, Jiafu; Zhang, Jianan; Wang, Kaixi
• Is Part Of: Angewandte Chemie international edition. Volume 54:Issue 50(2015)
• Page Start: 15226
• Page End: 15230
• Publication Date: 2015-10-23
• Subjects: heterostructures -- nanosheets -- photocatalysis -- tungsten oxides -- tungsten sulfides; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201508216
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Two‐dimensional (2D) lateral heterostructures have emerged as a hot topic in the fast evolving field of advanced functional materials, but their fabrication is challenging. The layer‐structured WS2 was theoretically demonstrated to be inert to oxidation except for the monolayer, which can be selectively oxidized owing to the simultaneous interaction of oxygen with both sides. Combined with the theoretical calculations, a new method was developed for the successful construction of 2D lateral heterostructures of WS2 /WO3 ⋅H2 O in an ambient environment, based on a simple liquid‐phase solution exfoliation. These lateral heterostructures of WS2 /WO3 ⋅H2 O have interesting properties, as indicated by enhanced photocatalytic activity toward the degradation of methyl orange (MO). Abstract : Patchwork : 2D lateral WS2 /WO3 ⋅H2 O heterostructures were successfully fabricated through the selective oxidation of monolayer WS2 . The presence of the heterostructures creates long‐lived electron–hole pairs, which results in enhanced photocatalytic activity toward the degradation of methyl orange and higher photocurrent under visible‐light irradiation.