title: Superior adsorption and photoinduced carries transfer behaviors of dandelion-shaped Bi2S3@MoS2: experiments and theory.
abstract: The enhanced light-harvesting capacity and effective separation of photogenerated carriers in fantastic hierarchical heterostructures enjoy striking attention for potential applications in the field of solar cells and photocatalysis. A three-dimensional (3D) dandelion-shaped hierarchical Bi2S3microsphere compactly decorated with wing-shaped few layered MoS2lamella (D-BM) was fabricated via a facile hydrothermal self-assembly process. Especially, polyethylene glycol (PEG) has been proven as the vital template to form D-BM microsphere. Importantly, the as-prepared D-BM microsphere presents pH-dependent superior adsorption behavior and remarkable visible light photocatalytic activity for degradation of organic dyestuffs (Rhodamine B/RhB and Methylene blue/MB), far exceeding those for the pure Bi2S3and MoS2. It is understandable that D-BM with high surface area possesses more active sites and promotes light utilization due to the unique porous structure with outspread wings. Besides, based on the experiments and theoretical calculations, the staggered type II band alignment of D-BM permits the charge injection from Bi2S3to MoS2, subsequently accelerates the separation and restrains the recombination of carriers, leading to excellent photocatalytic activity, as well as the photoconductance and photoresponse performance (with Ilight/Idarkratio 567).
authors.affiliation: Technical Center for Multifunctional Magneto-Optical Spectroscopy (ECNU), Shanghai Department of Electronic Engineering, East China Normal University, Shanghai 200241, China.
authors.forename: Mengjiao
authors.initials: M
authors.lastname: Li
authors.affiliation: Technical Center for Multifunctional Magneto-Optical Spectroscopy (ECNU), Shanghai Department of Electronic Engineering, East China Normal University, Shanghai 200241, China.
authors.forename: Junyong
authors.initials: J
authors.lastname: Wang
authors.affiliation: Technical Center for Multifunctional Magneto-Optical Spectroscopy (ECNU), Shanghai Department of Electronic Engineering, East China Normal University, Shanghai 200241, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.affiliation: Technical Center for Multifunctional Magneto-Optical Spectroscopy (ECNU), Shanghai Department of Electronic Engineering, East China Normal University, Shanghai 200241, China.
authors.forename: Qinglin
authors.initials: Q
authors.lastname: Deng
authors.affiliation: Technical Center for Multifunctional Magneto-Optical Spectroscopy (ECNU), Shanghai Department of Electronic Engineering, East China Normal University, Shanghai 200241, China.
authors.forename: Jinzhong
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Technical Center for Multifunctional Magneto-Optical Spectroscopy (ECNU), Shanghai Department of Electronic Engineering, East China Normal University, Shanghai 200241, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Jiang
authors.affiliation: Technical Center for Multifunctional Magneto-Optical Spectroscopy (ECNU), Shanghai Department of Electronic Engineering, East China Normal University, Shanghai 200241, China.
authors.forename: Zhigao
authors.initials: Z
authors.lastname: Hu
authors.affiliation: Technical Center for Multifunctional Magneto-Optical Spectroscopy (ECNU), Shanghai Department of Electronic Engineering, East China Normal University, Shanghai 200241, China.
authors.forename: Junhao
authors.initials: J
authors.lastname: Chu