g-C3N4 Photocatalysts: Utilizing Electron–Hole Pairs for Boosted Redox Capability in Water Splitting
Since the first discovery of solar-driven water splitting catalyzed by TiO2 semiconductors, extensive research works have been devoted over the decades. Currently, the design of a photocatalyst with dual redox potential is of prominent interest to fully utilize both photogenerated electrons and hole...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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American Association for the Advancement of Science (AAAS)
2023-01-01
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| Series: | Energy Material Advances |
| Online Access: | https://spj.science.org/doi/10.34133/energymatadv.0038 |
| _version_ | 1797773443324706816 |
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| author | Grayson Zhi Sheng Ling Valerie Bei-Yuan Oh Choon Yian Haw Lling-Lling Tan Wee-Jun Ong |
| author_facet | Grayson Zhi Sheng Ling Valerie Bei-Yuan Oh Choon Yian Haw Lling-Lling Tan Wee-Jun Ong |
| author_sort | Grayson Zhi Sheng Ling |
| collection | DOAJ |
| description | Since the first discovery of solar-driven water splitting catalyzed by TiO2 semiconductors, extensive research works have been devoted over the decades. Currently, the design of a photocatalyst with dual redox potential is of prominent interest to fully utilize both photogenerated electrons and holes in the redox reactions. Among all, the coproduction of H2 and O2 from water using metal-free carbon nitride (g-C3N4) has been viewed as a rising star in this field. However, the hole-mediated oxidation reaction is commonly recognized as the rate-determining step, which drastically leads to poor overall water splitting efficiency. On top of that, rapid recombination and undesirable back reaction appeared as one of the challenging parts in overall water splitting. In this review, the up-to-date advances in modified g-C3N4-based photocatalysts toward efficient overall water splitting are summarized, which are mainly classified into structural and defect engineering, single-atom catalysis, cocatalyst loading, and heterojunction construction. This review also addresses the underlying idea and concept to tackle the aforementioned problem with the use of emerging modification strategies, hence serving as the guiding star for future research. Despite the outstanding breakthrough thus far, critical recommendations related to g-C3N4 photocatalytic systems are prospected to pave the way toward the implementation in the practical energy production process. |
| first_indexed | 2024-03-12T22:06:33Z |
| format | Article |
| id | doaj.art-e9024f2636924064ae8818f37c1b0d7e |
| institution | Directory Open Access Journal |
| issn | 2692-7640 |
| language | English |
| last_indexed | 2024-03-12T22:06:33Z |
| publishDate | 2023-01-01 |
| publisher | American Association for the Advancement of Science (AAAS) |
| record_format | Article |
| series | Energy Material Advances |
| spelling | doaj.art-e9024f2636924064ae8818f37c1b0d7e2023-07-24T12:27:35ZengAmerican Association for the Advancement of Science (AAAS)Energy Material Advances2692-76402023-01-01410.34133/energymatadv.0038g-C3N4 Photocatalysts: Utilizing Electron–Hole Pairs for Boosted Redox Capability in Water SplittingGrayson Zhi Sheng Ling0Valerie Bei-Yuan Oh1Choon Yian Haw2Lling-Lling Tan3Wee-Jun Ong4School of Energy and Chemical Engineering, Xiamen University Malaysia, Sepang, Selangor Darul Ehsan, 43900, Malaysia.School of Energy and Chemical Engineering, Xiamen University Malaysia, Sepang, Selangor Darul Ehsan, 43900, Malaysia.School of Energy and Chemical Engineering, Xiamen University Malaysia, Sepang, Selangor Darul Ehsan, 43900, Malaysia.Multidisciplinary Platform of Advanced Engineering, Chemical Engineering Discipline, School of Engineering, Monash University, Jalan Lagoon Selatan, Bandar Sunway, Selangor, 47500, Malaysia.School of Energy and Chemical Engineering, Xiamen University Malaysia, Sepang, Selangor Darul Ehsan, 43900, Malaysia.Since the first discovery of solar-driven water splitting catalyzed by TiO2 semiconductors, extensive research works have been devoted over the decades. Currently, the design of a photocatalyst with dual redox potential is of prominent interest to fully utilize both photogenerated electrons and holes in the redox reactions. Among all, the coproduction of H2 and O2 from water using metal-free carbon nitride (g-C3N4) has been viewed as a rising star in this field. However, the hole-mediated oxidation reaction is commonly recognized as the rate-determining step, which drastically leads to poor overall water splitting efficiency. On top of that, rapid recombination and undesirable back reaction appeared as one of the challenging parts in overall water splitting. In this review, the up-to-date advances in modified g-C3N4-based photocatalysts toward efficient overall water splitting are summarized, which are mainly classified into structural and defect engineering, single-atom catalysis, cocatalyst loading, and heterojunction construction. This review also addresses the underlying idea and concept to tackle the aforementioned problem with the use of emerging modification strategies, hence serving as the guiding star for future research. Despite the outstanding breakthrough thus far, critical recommendations related to g-C3N4 photocatalytic systems are prospected to pave the way toward the implementation in the practical energy production process.https://spj.science.org/doi/10.34133/energymatadv.0038 |
| spellingShingle | Grayson Zhi Sheng Ling Valerie Bei-Yuan Oh Choon Yian Haw Lling-Lling Tan Wee-Jun Ong g-C3N4 Photocatalysts: Utilizing Electron–Hole Pairs for Boosted Redox Capability in Water Splitting Energy Material Advances |
| title | g-C3N4 Photocatalysts: Utilizing Electron–Hole Pairs for Boosted Redox Capability in Water Splitting |
| title_full | g-C3N4 Photocatalysts: Utilizing Electron–Hole Pairs for Boosted Redox Capability in Water Splitting |
| title_fullStr | g-C3N4 Photocatalysts: Utilizing Electron–Hole Pairs for Boosted Redox Capability in Water Splitting |
| title_full_unstemmed | g-C3N4 Photocatalysts: Utilizing Electron–Hole Pairs for Boosted Redox Capability in Water Splitting |
| title_short | g-C3N4 Photocatalysts: Utilizing Electron–Hole Pairs for Boosted Redox Capability in Water Splitting |
| title_sort | g c3n4 photocatalysts utilizing electron hole pairs for boosted redox capability in water splitting |
| url | https://spj.science.org/doi/10.34133/energymatadv.0038 |
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