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Facet Junction Engineering for Photocatalysis: A Comprehensive Review on Elementary Knowledge, Facet-Synergistic Mechanisms, Functional Modifications, and Future Perspectives

期刊

ADVANCED FUNCTIONAL MATERIALS
卷 32, 期 1, 页码 -

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202106982

关键词

charge separation; electronic structure; facet junction; photocatalyst; synergistic effect

资金

  1. National Science Foundation of China (NSFC) [51834009, 51801151]
  2. Natural Science Foundation of Shaanxi Province [2020JZ-47, 2020JM-451]
  3. Hundred Talent Program of Shaanxi Province
  4. Key Laboratory Project of Shaanxi Education Department [18JS070, 17JS081]
  5. Shaanxi Province Science Fund for Distinguished Young Scholars [2018JC-027]
  6. China Postdoctoral Science Foundation [2018M633643XB]
  7. Key Research and Development Project of Shaanxi Province [2017ZDXM-GY-033, 2017ZDXM-GY-028]
  8. Key Laboratory Project of Science and Technology Agency [13JS075]

向作者/读者索取更多资源

Facet junction, a complex polyhedral single crystal exposed to multiple crystallographic planes, shows notable facet-crosslinking effects and has potential in promoting the transfer and separation of photogenerated charge carriers. This review article provides an overview of facet junction-based photocatalysts, serving as a theoretical base for researchers focused on facet-dependent effects.
A facet junction (also called facet heterojunction or surface heterojunction) is defined as a complex polyhedral single crystal exposed to two, three, or four types of crystallographic planes, and is a promising platform for achieving multifunctional photocatalysis. Compared with simple polyhedral counterparts enclosed by the same crystallographic planes or conventional heterogeneous junctions, facet junctions have notable facet-crosslinking effects arising from different electronic structures of heterogeneous facets, which is beneficial for promoting the transfer and separation of photogenerated charge carriers in a single-crystalline semiconductor without the introduction of external species or interfaces. However, there are few specialized review articles on facet junction engineering of photocatalysts. Herein, an overview of facet junction-based photocatalysts is provided based on the following aspects: elementary knowledge, microstructural features, intrinsic facet-synergistic mechanisms, functional modifications, enhanced photocatalytic mechanisms, challenges and issues, and directions for future investigations. This review article will act as a theoretical base for researchers who are focused on facet-dependent effects to design and fabricate new photocatalysts.

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