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説明:

Heteroassembly of chemically exfoliated nanosheets (NSs) has been explored to produce functional two-dimensional materials for a wide range of applications in electronic and energy devices. In this study, the molecular-scale assembly approach is extended to construct visible-light active and stable photoelectrodes consisting of narrow- and wide-bandgap semiconductor units, i.e., MoS2 and Ti0.87O2 NSs, which contribute with complementary roles to the performance of the photoelectrodes. As a visible–light response element, 2H phase MoS2 NSs possessing high crystallinity were electrochemically exfoliated from a MoS2 crystal and functionalized via interface modification, yielding an absorbed photon-to-electron conversion efficiency that was two orders of magnitude higher than that of previously studied defective MoS2 NSs synthesized via Li intercalation. Furthermore, the controlled interfacial coupling between corrodible MoS2 NSs and a chemically stable, visible-light transparent Ti0.87O2 NS coating resulted in the enhanced photoelectrode durability due to the hole tunneling ability inherent to ultra-thin insulating oxide layers. Therefore, the visible-light responsivity of MoS2 and the chemical stability of Ti0.87O2 NSs were complementary combined in the interface-engineered heteroassembly system. This photoelectrode design can be expected to be applicable to other combinations of visible–light active narrow-bandgap and corrosion–protective wide-bandgap NS units compatible with various reaction systems.

権利情報:

• In Copyright
  

  This document is the Accepted Manuscript version of a Published Work that appeared in final form in Chemistry of Materials, copyright © 2024 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.chemmater.4c01054

キーワード: ナノシート

刊行年月日: 2024-08-13

出版者: American Chemical Society (ACS)

掲載誌:

• Chemistry of Materials (ISSN: 08974756) vol. 36 issue. 15 p. 7252-7262

研究助成金:

• Core Research for Evolutional Science and Technology JPMJCR22B1
• Japan Society for the Promotion of Science JP21H01769
• Ministry of Education, Culture, Sports, Science and Technology

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4872

公開URL: https://doi.org/10.1021/acs.chemmater.4c01054

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更新時刻: 2025-07-30 08:30:35 +0900

MDRでの公開時刻: 2025-07-30 08:16:42 +0900