Vertically-aligned Pt-decorated MoS2 nanosheets coated on TiO2 nanotube arrays enable high-efficiency solar-light energy utilization for photocatalysis and self-cleaning SERS devices

Jianing Dong, Jianying Huang, Aurelia Wang, Gill V. Biesold-McGee, Xinnan Zhang, Shouwei Gao, Shanchi Wang, Yuekun Lai, Zhiqun Lin

Research output: Contribution to journalArticlepeer-review

100 Scopus citations

Abstract

The ability to reproducibly create a surface enhanced Raman scattering (SERS) substrate renders an effective means of detecting and degrading organic contaminants. Vertically aligned (VA) nanomaterials have been extensively explored as highly efficient catalysts due to their excellent electron transportability and high concentration of exposed active edge sites. Herein, we report on a ternary ultrafast-electron-transfer heterostructure composed of Pt nanoparticles in-situ grown on VA-MoS2 nanosheet edge sites decorated on TiO2 nanotube arrays (NTAs) (denoted Pt/VA-MoS2/NTAs). Compared with pristine TiO2 NTAs, the Pt/VA-MoS2/NTAs possess a strong resonant SERS effect for detecting rhodamine 6G and an outstanding UV-assisted self-cleaning effect, displaying an excellent photocatalytic performance under visible light irradiation. Such markedly improved performance of the ternary Pt/VA-MoS2/TiO2 NTAs nanocomposites can be attributed to the synergy of catalytic activity of Pt-deposited MoS2 edge sites, the ultrafast electron transfers of VA-MoS2 NS/TiO2 NTAs, and the appropriate band alignment among these three constituents. As such, it represents a robust mean of developing advanced energy utilization nanocomposites for high-performance catalysts and sensors.

Original languageEnglish
Article number104579
JournalNano Energy
Volume71
DOIs
StatePublished - May 2020

Bibliographical note

Funding Information:
The authors thank the National Natural Science Foundation of China (51972063, 51502185), 111 Project (No. D17005), and Fuzhou University Testing Fund of precious apparatus (2019T022). We also acknowledge the funds from the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

Funding Information:
The authors thank the National Natural Science Foundation of China ( 51972063 , 51502185 ), 111 Project (No. D17005 ), and Fuzhou University Testing Fund of precious apparatus ( 2019T022 ). We also acknowledge the funds from the Priority Academic Program Development of Jiangsu Higher Education Institutions ( PAPD ).

Publisher Copyright:
© 2020

Keywords

  • Pt-decorated edge sites
  • Self-cleaning SERS
  • Vertically aligned MoS/TiO heterojunction
  • Visible-light photocatalysis

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