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Title: MoS 2/TiO 2 heterostructures as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution

Abstract

In this study, we report a nonmetal plasmonic MoS2@TiO2 heterostructure for highly efficient photocatalytic H2 generation. Large area laminated Z-scheme MoS2 in conjunction with TiO2 nanocavity arrays are achieved via carefully controlled anodization, physical vapor deposition, and chemical vapor deposition processes. Broad spectral response ranging from ultraviolet (UV)-visible (vis) to near-infrared (NIR) wavelengths and finite element frequency-domain simulation suggest that this MoS2@TiO2 heterostructured photocatalyst possesses an enhanced activity for H+ reduction. A high H2 yield rate of 580 mmol h-1 g-1 is achieved using a low catalyst loading mass of 10.2 μg. The spatially uniform heterostructure, correlated to plasmon-resonance through conformal coating MoS2 that effectively regulated charge transfer pathways, is proven to be vitally important for the unique solar energy harvesting and photocatalytic H2 production. As an innovative exploration, our study demonstrates that the photocatalytic activities of nonmetal, earth-abundant materials can be enhanced with plasmonic effects, which may serve as an excellent catalytic agent for solar energy conversion to chemical fuel. Periodically patterned MoS 2/TiO 2heterostructures were rationally designed as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution.

Authors:
ORCiD logo [1];  [2];  [3];  [3];  [4];  [3];  [4];  [2]; ORCiD logo [5]
  1. NanoScience Technology Center; University of Central Florida; Orlando; USA
  2. Physical and Computational Sciences Directorate; Pacific Northwest National Laboratory; Richland; USA
  3. Department of Materials Science and Engineering; University of Central Florida; Orlando; USA
  4. State Key Laboratory of New Ceramics and Fine Processing; Department of Materials Science and Engineering; Tsinghua University; Beijing 100084; China
  5. NanoScience Technology Center; University of Central Florida; Orlando; USA; Department of Materials Science and Engineering
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1439663
Report Number(s):
PNNL-SA-129523
Journal ID: ISSN 1754-5692; EESNBY; 49597; KC0203020
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Energy & Environmental Science
Additional Journal Information:
Journal Volume: 11; Journal Issue: 1; Journal ID: ISSN 1754-5692
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
Environmental Molecular Sciences Laboratory

Citation Formats

Guo, L., Yang, Z., Marcus, K., Li, Z., Luo, B., Zhou, L., Wang, X., Du, Y., and Yang, Y. MoS2/TiO2 heterostructures as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution. United States: N. p., 2018. Web. doi:10.1039/C7EE02464A.
Guo, L., Yang, Z., Marcus, K., Li, Z., Luo, B., Zhou, L., Wang, X., Du, Y., & Yang, Y. MoS2/TiO2 heterostructures as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution. United States. doi:10.1039/C7EE02464A.
Guo, L., Yang, Z., Marcus, K., Li, Z., Luo, B., Zhou, L., Wang, X., Du, Y., and Yang, Y. Mon . "MoS2/TiO2 heterostructures as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution". United States. doi:10.1039/C7EE02464A.
@article{osti_1439663,
title = {MoS2/TiO2 heterostructures as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution},
author = {Guo, L. and Yang, Z. and Marcus, K. and Li, Z. and Luo, B. and Zhou, L. and Wang, X. and Du, Y. and Yang, Y.},
abstractNote = {In this study, we report a nonmetal plasmonic MoS2@TiO2 heterostructure for highly efficient photocatalytic H2 generation. Large area laminated Z-scheme MoS2 in conjunction with TiO2 nanocavity arrays are achieved via carefully controlled anodization, physical vapor deposition, and chemical vapor deposition processes. Broad spectral response ranging from ultraviolet (UV)-visible (vis) to near-infrared (NIR) wavelengths and finite element frequency-domain simulation suggest that this MoS2@TiO2 heterostructured photocatalyst possesses an enhanced activity for H+ reduction. A high H2 yield rate of 580 mmol h-1 g-1 is achieved using a low catalyst loading mass of 10.2 μg. The spatially uniform heterostructure, correlated to plasmon-resonance through conformal coating MoS2 that effectively regulated charge transfer pathways, is proven to be vitally important for the unique solar energy harvesting and photocatalytic H2 production. As an innovative exploration, our study demonstrates that the photocatalytic activities of nonmetal, earth-abundant materials can be enhanced with plasmonic effects, which may serve as an excellent catalytic agent for solar energy conversion to chemical fuel. Periodically patterned MoS2/TiO2heterostructures were rationally designed as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution.},
doi = {10.1039/C7EE02464A},
journal = {Energy & Environmental Science},
issn = {1754-5692},
number = 1,
volume = 11,
place = {United States},
year = {2018},
month = {1}
}

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