Temperature-Mediated Selective Growth of MoS2 /WS2 and WS2 /MoS2 Vertical Stacks on Au Foils for Direct Photocatalytic Applications

Jianping Shi; Rui Tong; Xiebo Zhou; Yue Gong; Zhepeng Zhang; Qingqing Ji; Yu Zhang; Qiyi Fang; Lin Gu; Xina Wang; Zhongfan Liu; Yanfeng Zhang

doi:10.1002/adma.201603174

Temperature-Mediated Selective Growth of MoS₂ /WS₂ and WS₂ /MoS₂ Vertical Stacks on Au Foils for Direct Photocatalytic Applications

Adv Mater. 2016 Dec;28(48):10664-10672. doi: 10.1002/adma.201603174. Epub 2016 Oct 14.

Authors

Jianping Shi^{1

2}, Rui Tong³, Xiebo Zhou^{1

2}, Yue Gong⁴, Zhepeng Zhang², Qingqing Ji², Yu Zhang^{1

2}, Qiyi Fang^{1

2}, Lin Gu^{4

5}, Xina Wang³, Zhongfan Liu², Yanfeng Zhang^{1

2}

Affiliations

¹ Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China.
² Center for Nanochemistry (CNC), Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China.
³ Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Faculty of Physics and Electronic Technology, Hubei University, Wuhan, 430062, P. R. China.
⁴ Institute of Physics, Chinese Academy of Sciences and Beijing National Laboratory for Condensed Matter Physics, Beijing, 100190, P. R. China.
⁵ Collaborative Innovation Center of Quantum Matter, Beijing, 100190, P. R. China.

PMID: 27740690
DOI: 10.1002/adma.201603174

Abstract

A growth-temperature-mediated two-step chemical vapor deposition strategy is designed to synthesize MoS₂ /WS₂ and WS₂ /MoS₂ stacks on Au foils. Predominantly A-A stacked MoS₂ /WS₂ and A-B stacked WS₂ /MoS₂ are selectively achieved and confirmed. Relative enhancements or reductions in photocatalytic activities of MoS₂ /WS₂ or WS₂ /MoS₂ are observed under illumination, because the type-II band alignment enables directional electron flow from electrode to active site.

Keywords: MoS2; WS2; electron-hole separation; photocatalysis; vertical heterostructures.