Constructing multifunctional novel noble-metal free NiS/ZnS/g-C3N4 ternary nanocomposites for highly active superior photocatalytic water splitting
Ultrasound-assisted wet-impregnation approach and cation-exchange hydrothermal method are employed effectively to develop the ternary nanocomposites NiS/ZnS/g-C3N4 (NZ-CN) with promising photocatalytic hydrogen (H2) generation activity. Several analytical techniques are utilized to characterize the...
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Elsevier Ltd
2025
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| author | Rameshbabu R. Siaw Paw J.K. Ajaijawahar K. Arunachalam A. Jadoun S. Viswanathan M.R. Yaw C.T. Kiong T.S. Tong C.W. Abed A.M. Majdi H.S. Pasupuleti J. |
| author2 | 55621066400 |
| author_facet | 55621066400 Rameshbabu R. Siaw Paw J.K. Ajaijawahar K. Arunachalam A. Jadoun S. Viswanathan M.R. Yaw C.T. Kiong T.S. Tong C.W. Abed A.M. Majdi H.S. Pasupuleti J. |
| author_sort | Rameshbabu R. |
| building | UNITEN Library |
| collection | Institutional Repository |
| content_provider | Universiti Tenaga Nasional |
| content_source | UNITEN Institutional Repository |
| continent | Asia |
| country | Malaysia |
| description | Ultrasound-assisted wet-impregnation approach and cation-exchange hydrothermal method are employed effectively to develop the ternary nanocomposites NiS/ZnS/g-C3N4 (NZ-CN) with promising photocatalytic hydrogen (H2) generation activity. Several analytical techniques are utilized to characterize the as-synthesized NiS/ZnS/g-C3N4 nanocomposites to study their physical and chemical characteristics. The H2 production activity of the synthesized photocatalysts was tested using a 250 W halogen lamp with Na2S (0.25 M) and Na2SO3 (0.35 M) as sacrificial reagents. The optimized NZ-CN7.5% (3% NiS/ZnS/7.5% g-C3N4) catalyst displayed an exceptional H? generation rate of 8624 ?mol h?1 g?1, exceeding both, pristine g-C3N4 (by 22.1 times) and 3% NiS/ZnS (by 3 times). This represents the highest reported rate of H? evolution for a graphitic carbon nitride (g-C3N4) based ternary nanocomposite under simulated solar radiation. By reusing the used NZ-CN7.5% (3% NiS/ZnS/7.5% g-C3N4) photocatalyst in four consecutive runs, the stability of the catalyst was investigated, and their individual activity in the H2 production activity was assessed. This study provides valuable insights for designing efficient noble metal-free g?C3N4?based photocatalysts, which can significantly contribute to the transition to solar-driven hydrogen generation. Further, we proposed a plausible mechanism for the photocatalytic H2 generation process over the NiS/ZnS/g-C3N4 photocatalyst. ? 2024 Hydrogen Energy Publications LLC |
| format | Article |
| id | my.uniten.dspace-36992 |
| institution | Universiti Tenaga Nasional |
| publishDate | 2025 |
| publisher | Elsevier Ltd |
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| spelling | my.uniten.dspace-369922025-03-03T15:46:25Z Constructing multifunctional novel noble-metal free NiS/ZnS/g-C3N4 ternary nanocomposites for highly active superior photocatalytic water splitting Rameshbabu R. Siaw Paw J.K. Ajaijawahar K. Arunachalam A. Jadoun S. Viswanathan M.R. Yaw C.T. Kiong T.S. Tong C.W. Abed A.M. Majdi H.S. Pasupuleti J. 55621066400 57883504000 57218329653 58643178100 57189469761 57938995400 36560884300 57216824752 56462088100 57716714900 59295318200 11340187300 Carbon nitride Catalysts Hydrogen production Nanocomposites Nickel sulfates Photocatalytic activity Sodium sulfide Solar power generation Sulfur compounds Active site Carrier transfer Co-catalyse Energy H 2 production Metal free NiS/ZnS/g-C3N4 Production activity Synthesised Ternary nanocomposites Precious metals Ultrasound-assisted wet-impregnation approach and cation-exchange hydrothermal method are employed effectively to develop the ternary nanocomposites NiS/ZnS/g-C3N4 (NZ-CN) with promising photocatalytic hydrogen (H2) generation activity. Several analytical techniques are utilized to characterize the as-synthesized NiS/ZnS/g-C3N4 nanocomposites to study their physical and chemical characteristics. The H2 production activity of the synthesized photocatalysts was tested using a 250 W halogen lamp with Na2S (0.25 M) and Na2SO3 (0.35 M) as sacrificial reagents. The optimized NZ-CN7.5% (3% NiS/ZnS/7.5% g-C3N4) catalyst displayed an exceptional H? generation rate of 8624 ?mol h?1 g?1, exceeding both, pristine g-C3N4 (by 22.1 times) and 3% NiS/ZnS (by 3 times). This represents the highest reported rate of H? evolution for a graphitic carbon nitride (g-C3N4) based ternary nanocomposite under simulated solar radiation. By reusing the used NZ-CN7.5% (3% NiS/ZnS/7.5% g-C3N4) photocatalyst in four consecutive runs, the stability of the catalyst was investigated, and their individual activity in the H2 production activity was assessed. This study provides valuable insights for designing efficient noble metal-free g?C3N4?based photocatalysts, which can significantly contribute to the transition to solar-driven hydrogen generation. Further, we proposed a plausible mechanism for the photocatalytic H2 generation process over the NiS/ZnS/g-C3N4 photocatalyst. ? 2024 Hydrogen Energy Publications LLC Article in press 2025-03-03T07:46:25Z 2025-03-03T07:46:25Z 2024 Article 10.1016/j.ijhydene.2024.07.090 2-s2.0-85198267295 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85198267295&doi=10.1016%2fj.ijhydene.2024.07.090&partnerID=40&md5=31a25617ad57459120ccf97e504777c1 https://irepository.uniten.edu.my/handle/123456789/36992 Elsevier Ltd Scopus |
| spellingShingle | Carbon nitride Catalysts Hydrogen production Nanocomposites Nickel sulfates Photocatalytic activity Sodium sulfide Solar power generation Sulfur compounds Active site Carrier transfer Co-catalyse Energy H 2 production Metal free NiS/ZnS/g-C3N4 Production activity Synthesised Ternary nanocomposites Precious metals Rameshbabu R. Siaw Paw J.K. Ajaijawahar K. Arunachalam A. Jadoun S. Viswanathan M.R. Yaw C.T. Kiong T.S. Tong C.W. Abed A.M. Majdi H.S. Pasupuleti J. Constructing multifunctional novel noble-metal free NiS/ZnS/g-C3N4 ternary nanocomposites for highly active superior photocatalytic water splitting |
| title | Constructing multifunctional novel noble-metal free NiS/ZnS/g-C3N4 ternary nanocomposites for highly active superior photocatalytic water splitting |
| title_full | Constructing multifunctional novel noble-metal free NiS/ZnS/g-C3N4 ternary nanocomposites for highly active superior photocatalytic water splitting |
| title_fullStr | Constructing multifunctional novel noble-metal free NiS/ZnS/g-C3N4 ternary nanocomposites for highly active superior photocatalytic water splitting |
| title_full_unstemmed | Constructing multifunctional novel noble-metal free NiS/ZnS/g-C3N4 ternary nanocomposites for highly active superior photocatalytic water splitting |
| title_short | Constructing multifunctional novel noble-metal free NiS/ZnS/g-C3N4 ternary nanocomposites for highly active superior photocatalytic water splitting |
| title_sort | constructing multifunctional novel noble-metal free nis/zns/g-c3n4 ternary nanocomposites for highly active superior photocatalytic water splitting |
| topic | Carbon nitride Catalysts Hydrogen production Nanocomposites Nickel sulfates Photocatalytic activity Sodium sulfide Solar power generation Sulfur compounds Active site Carrier transfer Co-catalyse Energy H 2 production Metal free NiS/ZnS/g-C3N4 Production activity Synthesised Ternary nanocomposites Precious metals |
| url_provider | http://dspace.uniten.edu.my/ |