Coupling Long‐Range Facet Junction and Interfacial Heterojunction via Edge‐Selective Deposition for High‐Performance Z‐Scheme Photocatalyst
Abstract The construction of photocatalytic systems that have strong redox capability, effective charge separation, and large reactive surfaces is of great scientific and practical interest. Herein, an edge‐connected 2D/2D Z‐scheme system that combines the facet junction and the interfacial heteroju...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-06-01
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| Series: | Advanced Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/advs.202200346 |
| _version_ | 1811241803144232960 |
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| author | Xuan Li Shoaib Anwer Qiangshun Guan Dalaver H. Anjum Giovanni Palmisano Lianxi Zheng |
| author_facet | Xuan Li Shoaib Anwer Qiangshun Guan Dalaver H. Anjum Giovanni Palmisano Lianxi Zheng |
| author_sort | Xuan Li |
| collection | DOAJ |
| description | Abstract The construction of photocatalytic systems that have strong redox capability, effective charge separation, and large reactive surfaces is of great scientific and practical interest. Herein, an edge‐connected 2D/2D Z‐scheme system that combines the facet junction and the interfacial heterojunction to achieve effective long‐range charge separation and large reactive surface exposure is designed and fabricated. The heterostructure is realized by the selective growth of 2D‐layered MoS2 nanoflakes on the edge‐sites of thin TiO2 nanosheets via an Au‐promoted photodeposition method. Attributed to the synergetic coupling of the facet junction and the interfacial heterojunction that assures the effective charge separation, and the tremendous but physically separated reactive sites offered by layered MoS2 and highly‐exposed (001) facets of TiO2, respectively, the artificial Z‐scheme exhibits excellent photocatalytic performance in photodegradation tests. Moreover, the junctional plasmonic Au nanoclusters not only act as electron traps to promote the edge‐selective synthesis but also generate “hot electrons” to further boost photocatalytic performance. The Z‐scheme charge‐flow direction in the heterostructure and the roles of electrons and holes are comprehensively studied using in situ irradiated X‐ray photoelectron spectroscopy and photodegradation tests. This work offers a new insight into designing high‐performance Z‐scheme photocatalytic systems. |
| first_indexed | 2024-04-12T13:42:34Z |
| format | Article |
| id | doaj.art-f8f00b856a9744958b8ccd5dd141d82b |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-04-12T13:42:34Z |
| publishDate | 2022-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-f8f00b856a9744958b8ccd5dd141d82b2022-12-22T03:30:49ZengWileyAdvanced Science2198-38442022-06-01918n/an/a10.1002/advs.202200346Coupling Long‐Range Facet Junction and Interfacial Heterojunction via Edge‐Selective Deposition for High‐Performance Z‐Scheme PhotocatalystXuan Li0Shoaib Anwer1Qiangshun Guan2Dalaver H. Anjum3Giovanni Palmisano4Lianxi Zheng5Department of Mechanical Engineering Khalifa University of Science and Technology Abu Dhabi 127788 United Arab EmiratesDepartment of Mechanical Engineering Khalifa University of Science and Technology Abu Dhabi 127788 United Arab EmiratesDepartment of Mechanical Engineering Khalifa University of Science and Technology Abu Dhabi 127788 United Arab EmiratesDepartment of Physics Khalifa University of Science and Technology Abu Dhabi 127788 United Arab EmiratesResearch and Innovation on CO2 and H2 (RICH) Center Khalifa University of Science and Technology Abu Dhabi 127788 United Arab EmiratesDepartment of Mechanical Engineering Khalifa University of Science and Technology Abu Dhabi 127788 United Arab EmiratesAbstract The construction of photocatalytic systems that have strong redox capability, effective charge separation, and large reactive surfaces is of great scientific and practical interest. Herein, an edge‐connected 2D/2D Z‐scheme system that combines the facet junction and the interfacial heterojunction to achieve effective long‐range charge separation and large reactive surface exposure is designed and fabricated. The heterostructure is realized by the selective growth of 2D‐layered MoS2 nanoflakes on the edge‐sites of thin TiO2 nanosheets via an Au‐promoted photodeposition method. Attributed to the synergetic coupling of the facet junction and the interfacial heterojunction that assures the effective charge separation, and the tremendous but physically separated reactive sites offered by layered MoS2 and highly‐exposed (001) facets of TiO2, respectively, the artificial Z‐scheme exhibits excellent photocatalytic performance in photodegradation tests. Moreover, the junctional plasmonic Au nanoclusters not only act as electron traps to promote the edge‐selective synthesis but also generate “hot electrons” to further boost photocatalytic performance. The Z‐scheme charge‐flow direction in the heterostructure and the roles of electrons and holes are comprehensively studied using in situ irradiated X‐ray photoelectron spectroscopy and photodegradation tests. This work offers a new insight into designing high‐performance Z‐scheme photocatalytic systems.https://doi.org/10.1002/advs.2022003462D materialfacet junctionheterojunctionphotocatalystphotodegradationselective growth |
| spellingShingle | Xuan Li Shoaib Anwer Qiangshun Guan Dalaver H. Anjum Giovanni Palmisano Lianxi Zheng Coupling Long‐Range Facet Junction and Interfacial Heterojunction via Edge‐Selective Deposition for High‐Performance Z‐Scheme Photocatalyst Advanced Science 2D material facet junction heterojunction photocatalyst photodegradation selective growth |
| title | Coupling Long‐Range Facet Junction and Interfacial Heterojunction via Edge‐Selective Deposition for High‐Performance Z‐Scheme Photocatalyst |
| title_full | Coupling Long‐Range Facet Junction and Interfacial Heterojunction via Edge‐Selective Deposition for High‐Performance Z‐Scheme Photocatalyst |
| title_fullStr | Coupling Long‐Range Facet Junction and Interfacial Heterojunction via Edge‐Selective Deposition for High‐Performance Z‐Scheme Photocatalyst |
| title_full_unstemmed | Coupling Long‐Range Facet Junction and Interfacial Heterojunction via Edge‐Selective Deposition for High‐Performance Z‐Scheme Photocatalyst |
| title_short | Coupling Long‐Range Facet Junction and Interfacial Heterojunction via Edge‐Selective Deposition for High‐Performance Z‐Scheme Photocatalyst |
| title_sort | coupling long range facet junction and interfacial heterojunction via edge selective deposition for high performance z scheme photocatalyst |
| topic | 2D material facet junction heterojunction photocatalyst photodegradation selective growth |
| url | https://doi.org/10.1002/advs.202200346 |
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