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- 주제어 : Mn0.5Cd0.5S (검색결과 2 건)
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Efficient solar-light photocatalytic H2 evolution of Mn0.5Cd0.5S coupling with S,N-codoped carbon
Hao Peng,Congying Huang,Xiaogang Zheng,Jing Wen 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.106 No.-
The low-cost and highly-efficient photocatalysts for solar-light induced water splitting had drawn greatattention to develop the renewable hydrogen economy. To enhance the solar-light driven H2 evolution ofMn0.5Cd0.5S, Mn0.5Cd0.5S was modified by S,N-codoped carbon (3-MCS/SN-C) via the in-situ sulfurizationat high temperature. In contrast with Mn0.5Cd0.5S (11.13 mmol g1 h1) and S-doped g-C3N4(0.35 mmol g1 h1), the optimal 3-MCS/SN-C with a mass ratio of Mn0.5Cd0.5S to S,N-codoped carbonof 1:3 exhibited the best H2 evolution rate of 27.58 mmol g1 h1 and an apparent quantum yield of27.43% at 400 nm. The photo-corrosion induced to the decreased H2 evolution capacity of 3-MCS/SN-Cfrom 131.13 to 126.52 mmol g1 after five cycles of 5 h. S,N-codoped carbon could efficiently capture visiblelight and absorb the photons, leading to the efficient transformation and separation of photogeneratedcarriers at the junction interface between Mn0.5Cd0.5S and S,N-codoped carbon.
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Novel NiCo2Se4/Mn0.5Cd0.5S photocatalyst for visible light-driven hydrogen evolution
Liu Chao,Zhang Feng-Jun,Wang Ying-Rui,Xie Wen-Jie,Ma Jie,Oh Won-Chun 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.4
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 NiCo 2Se4/Mn0.5Cd0.5S composites with different NiCo 2Se4 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 Na 2S·9H2O and Na 2SO3 as sacrificial reagents. The 4% NiCo 2Se4/ Mn 0.5Cd0.5S composites exhibited the highest photocatalytic hydrogen evolution capacity, producing 20 mmol h −1 g−1 of hydrogen, higher than pure Mn0.5Cd0.50.5S (12.2mmol h-1g-1). The tight bonding of the two materials in the NiCo 2Se4/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 NiCo 2Se4/ 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.
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