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Author：

Yuan, Q. (Yuan, Q..) | Huang, J. (Huang, J..) | Li, A. (Li, A..) | Lu, N. (Lu, N..) | Lu, W. (Lu, W..) | Zhu, Y. (Zhu, Y..) | Zhang, Z. (Zhang, Z..)

Indexed by：

EI Scopus SCIE

Abstract：

Semiconductor　quantum　wells　(QWs)　exhibit　high　charge-utilization　efficiency　for　light-emitting　applications　due　to　their　strong　charge　confinement　effect.　Inspired　by　this　effect,　herein,　this　work　proposes　a　new　idea　to　significantly　improve　the　photo-generated　charge　separation　for　attaining　a　highly-efficient　solar-to-fuels　conversion　process　through　“semi-reversing”　the　conventional　QWs　to　confine　only　the　photo-generated　electrons.　This　electron　confinement-improved　charge　separation　is　implemented　in　the　well-designed　model　of　the　CdS/TiO2/CdS　semi-reversed　QW　(SRQW)　structure.　The　latter　is　fabricated　by　selectively　assembling　CdS　quantum　dots　(QDs)　onto　the　{101}　facets　(ultra-thin　edge　regions)　of　the　TiO2　nanosheets　(NSs).　Upon　light　excitation,　the　photo-generated　electrons　of　SRQW　can　be　confined　on　the　TiO2-{101}　facets　in　the　vicinity　of　the　CdS/TiO2　hetero-interface.　Thereby,　the　continuous　multi-electron　injection　to　the　adsorbed　reactants　on　the　interfacial　active-sites　is　significantly　accelerated.　Thus,　the　CdS/TiO2/CdS　SRQW　exhibits　≈35.7　and　≈56.0-fold　enhancements　on　the　photocatalytic　activities　for　water　and　CO2　reduction,　respectively,　compared　to　those　of　pure　TiO2.　Correspondingly,　its　CH4-product　selectivity　is　increased　by　≈180%.　This　work　provides　a　novel　charge　separation　mechanism,　which　is　of　great　importance　for　the　design　of　the　next-generation　quantum-sized　photocatalysts　for　solar-to-fuels　conversion.　©　2024　Wiley-VCH　GmbH.

Keyword：

photocatalysis quantum wells semiconductors H2 production CO2 reduction

Author Community：

  • [ 1 ] [Yuan Q.]Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, Key Laboratory of Photosensitive Materials and Devices of Liaoning Province, School of Physics and Materials Engineering, Dalian Minzu University, 18 Liaohe West Road, Dalian, 116600, China
  • [ 2 ] [Yuan Q.]Dalian Key Laboratory of Low-Dimensional Semiconductor Optoelectronic Materials and Applications, School of Physics and Materials Engineering, Dalian Minzu University, 18 Liaohe West Road, Dalian, 116600, China
  • [ 3 ] [Huang J.]Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, Key Laboratory of Photosensitive Materials and Devices of Liaoning Province, School of Physics and Materials Engineering, Dalian Minzu University, 18 Liaohe West Road, Dalian, 116600, China
  • [ 4 ] [Huang J.]Dalian Key Laboratory of Low-Dimensional Semiconductor Optoelectronic Materials and Applications, School of Physics and Materials Engineering, Dalian Minzu University, 18 Liaohe West Road, Dalian, 116600, China
  • [ 5 ] [Li A.]Faculty of Materials and Manufacturing, Beijing Key Lab of Microstructure and Properties of Advanced Materials, Beijing University of Technology, Beijing, 100124, China
  • [ 6 ] [Lu N.]Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, Key Laboratory of Photosensitive Materials and Devices of Liaoning Province, School of Physics and Materials Engineering, Dalian Minzu University, 18 Liaohe West Road, Dalian, 116600, China
  • [ 7 ] [Lu N.]Dalian Key Laboratory of Low-Dimensional Semiconductor Optoelectronic Materials and Applications, School of Physics and Materials Engineering, Dalian Minzu University, 18 Liaohe West Road, Dalian, 116600, China
  • [ 8 ] [Lu W.]Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, Key Laboratory of Photosensitive Materials and Devices of Liaoning Province, School of Physics and Materials Engineering, Dalian Minzu University, 18 Liaohe West Road, Dalian, 116600, China
  • [ 9 ] [Lu W.]Dalian Key Laboratory of Low-Dimensional Semiconductor Optoelectronic Materials and Applications, School of Physics and Materials Engineering, Dalian Minzu University, 18 Liaohe West Road, Dalian, 116600, China
  • [ 10 ] [Zhu Y.]Dalian Key Laboratory of Low-Dimensional Semiconductor Optoelectronic Materials and Applications, School of Physics and Materials Engineering, Dalian Minzu University, 18 Liaohe West Road, Dalian, 116600, China
  • [ 11 ] [Zhang Z.]Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, Key Laboratory of Photosensitive Materials and Devices of Liaoning Province, School of Physics and Materials Engineering, Dalian Minzu University, 18 Liaohe West Road, Dalian, 116600, China
  • [ 12 ] [Zhang Z.]Dalian Key Laboratory of Low-Dimensional Semiconductor Optoelectronic Materials and Applications, School of Physics and Materials Engineering, Dalian Minzu University, 18 Liaohe West Road, Dalian, 116600, China

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Source ：

Advanced Materials

ISSN： 0935-9648

Year： 2024

Issue： 16

Volume： 36

2 9 . 4 0 0

JCR@2022

Cited Count：

WoS CC Cited Count： 0

SCOPUS Cited Count： 16

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 0

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