| Novel NiCo2Se4/Mn0.5Cd0.5S photocatalyst for visible light-driven hydrogen evolution |
| Chao Liu1, Feng-Jun Zhang1,2, Ying-Rui Wang2,3, Wen-Jie Xie2, Jie Ma2, Won-Chun Oh4 |
1Key Laboratory of Functional Molecule Design and Interface Process, Anhui Jianzhu University, Hefei 230601 , Anhui, People’s Republic of China
2Anhui Key Laboratory of Advanced Building Materials, Anhui Jianzhu University, Hefei 230022 , Anhui, People’s Republic of China
3Construction Economy and Real Estate Management Research Center, Anhui Jianzhu University, Hefei 230601, Anhui, People’s Republic of China
4Department of Advanced Materials Science and Engineering, Hanseo University, Seosan 31962, South Korea |
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Received: April 5, 2022; Revised: June 21, 2022 Accepted: July 4, 2022. Published online: July 19, 2022. |
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| ABSTRACT |
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The development of efficient and stable photocatalysts is one of the most important research directions to realize the practical application of photocatalytic hydrogen evolution. A series of novel visible light responsive NiCo2Se4/Mn0.5Cd0.5S composites with different NiCo2Se4 contents were prepared by hydrothermal method. The composites were characterized using different characterization techniques such as XRD, SEM, TEM, XPS, UV–Vis DRS, PL, and photoelectrochemistry. Photocatalytic hydrogen evolution reaction was also performed using visible light (λ > 420 nm) in an aqueous solution containing Na2S·9H2O and Na2SO3 as sacrificial reagents. The 4% NiCo2Se4/ Mn0.5Cd0.5S composites exhibited the highest photocatalytic hydrogen evolution capacity, producing 20 mmol h−1g−1 of hydrogen, higher than pure Mn0.5Cd0.5S (12.2 mmol h−1g−1). The tight bonding of the two materials in the NiCo2Se4/Mn0.5Cd0.5S composites may enhance the photocatalytic activity to some extent. The possible mechanism was suggested by UV–Vis DRS and photoelectrochemical measurements. The obtained NiCo2Se4/Mn0.5Cd0.5S composites have excellent photocatalytic activity and good stability in photocatalytic hydrogen evolution, and have potential applications in the photocatalytic hydrogen evolution from water using solar energy. |
| Key words:
Photocatalytic · Hydrogen evolution · NiCo2Se4/Mn0.5Cd0.5S |
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