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Rational design of hetero-dimensional C-ZnO/MoS2 nanocomposite anchored on 3D mesoporous carbon framework towards synergistically enhanced stability and efficient visible-light-driven photocatalytic activity.

Authors
  • Islam, Sk Emdadul1
  • Hang, Da-Ren2
  • Chen, Chun-Hu3
  • Chou, Mitch M C4
  • Liang, Chi-Te5
  • Sharma, Krishna Hari6
  • 1 Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan; Department of Physics, National Taiwan University, Taipei, 10617, Taiwan. , (Taiwan)
  • 2 Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan; Center of Crystal Research, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan. Electronic address: [email protected] , (Taiwan)
  • 3 Department of Chemistry, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan. , (Taiwan)
  • 4 Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan; Center of Crystal Research, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan. , (Taiwan)
  • 5 Department of Physics, National Taiwan University, Taipei, 10617, Taiwan. Electronic address: [email protected] , (Taiwan)
  • 6 Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan. , (Taiwan)
Type
Published Article
Journal
Chemosphere
Publication Date
Mar 01, 2021
Volume
266
Pages
129148–129148
Identifiers
DOI: 10.1016/j.chemosphere.2020.129148
PMID: 33310520
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

For efficient solar energy harvesting, various engineering strategies to strengthen visible-light responsivity of ZnO photocatalyst is under intensive investigation. In this work, a new ternary C-ZnO/MoS2/mesoporous carbon nanocomposite was successfully prepared by a two-step solution-processed synthesis protocol. The ternary composite exhibits a well-interconnected 3D mesoporous microstructure assembled by carbon nanosheets, which is loaded with quasi 0D ZnO nanoparticles and 2D MoS2 nanosheets. The carbonaceous nanocomposites show enhanced visible-light-driven photocatalytic performance and high photo-corrosion resistance. The incorporation of carbon in the hybrid design has manifold benefits that drastically promotes the photoactivity and photostability. The significant enhancement in photodegradation activity of the hybrid catalysts can be ascribed to a few positive synergistic effects, such as increased surface area and active reaction sites, boosted surface charge utilization efficiency, and band-gap lowering. The high porosity of the distinct microstructure raises the dye adsorption within the material. Tailored interface/surface properties enable more effective mass transport and higher separation efficiency of photo-generated carriers. The modulated electronic structure leads to the narrowing of the ZnO optical bandgap. Meanwhile, coupling with carbon prevents ZnO from photo-corrosion. Our approach highlights the roles of carbon as structure directing and stabilizing agents as well as heteroatom in defect engineering for wide band-gap oxide materials. The rational material design of multivariate mixed-dimensional architecture also provides guiding insight for the advancement of heterogeneous photocatalyst materials with superior performance and durability. The presented engineering strategy would be a promising method for the preparation of nanomaterials supported on 3D carbon network with high porosity and visible-light-driven photocatalytic performance. Copyright © 2020 Elsevier Ltd. All rights reserved.

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