title: Synthesis of Bi2S3-Au Dumbbell Heteronanostructures with Enhanced Photocatalytic and Photoresponse Properties.
abstract: In this article, novel types of Bi2S3-Au heterostructures are fabricated through rationally controlling the growth atmosphere. Under argon, Au nanoparticles are preferentially deposited onto the tips of Bi2S3nanorods to form Bi2S3-Au dumbbell heterostructures. In contrast, because of the etching effect by amine, Au nanoparticles are randomly anchored onto the surface of nanorods to form Bi2S3-Au nanocorns in the presence of oxygen. Furthermore, the size of gold nanoparticles can be controlled through adjusting the concentration of reaction precursors. Bi2S3-Au dumbbells show superior activity for the photodegradation of organic pollutants and an enhanced photoresponse compared to the Bi2S3-Au nanocorns. The significantly improved photocatalytic performance of Bi2S3-Au dumbbells is ascribed to the more efficient charge separation compared to that of Bi2S3-Au nanocorns. These heterostructures composed of environmentally friendly elements are expected to be promising for applications in the field of clean energy.
authors.affiliation: Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences , 100083 Beijing, P. R. China.
authors.forename: Baoying
authors.initials: B
authors.lastname: Li
authors.affiliation: Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences , 100083 Beijing, P. R. China.
authors.forename: Yihe
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences , 100083 Beijing, P. R. China.
authors.forename: Ruifeng
authors.initials: R
authors.lastname: Du
authors.affiliation: School of Materials Science and Engineering, State Key Laboratory of Materials Processing and Die and Mold Technology, Huazhong University of Science and Technology , 430074 Wuhan, P. R. China.
authors.forename: Lin
authors.initials: L
authors.lastname: Gan
authors.affiliation: Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences , 100083 Beijing, P. R. China.
authors.forename: Xuelian
authors.initials: X
authors.lastname: Yu