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Enhancement of photocatalytic hydrogen evolution with catalysts based on carbonized MOF-5 and g-C3N4

机译:基于碳化的MOF-5和G-C3N4的催化剂增强光催化氢气越野

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摘要

The study presents enhancement of photocatalytic hydrogen generation after metal-organic framework (MOF5) carbonization at 700 degrees C and its utilization as a co-catalyst of graphitic carbon nitride (gCN). Thermal treatment of MOF5 affected the formation of ZnO nanoparticles which played the role of co-catalyst for H-2 evolution. Moreover, significant band-gap narrowing of MOF5 was observed, which also affected the narrowing of the hybrid band gap. The appropriate conduction band position of the carbonized MOF allowed photogenerated electron transfer from gCN to the carbonized MOF, hence, improving the separation of the charge carriers and reducing the overpotential for H-2 generation. The mechanism of the photocatalytic process was also discussed.
机译:该研究提高了金属有机骨架(MOF5)碳化在700℃下的光催化氢气产生的增强及其作为石墨氮化物(GCN)的助催化剂的利用。 MOF5的热处理影响了ZnO纳米颗粒的形成,该ZnO纳米粒子发挥了H-2进化的助催化剂的作用。 此外,观察到MOF5的显着带间隙变窄,这也影响了混合带隙的缩小。 碳化的MOF的适当导通带位置允许从GCN到碳化的MOF的光生电子转移,从而改善电荷载流子的分离并减少H-2代的过电位。 还讨论了光催化过程的机制。

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  • 来源
    《RSC Advances》 |2020年第7期|共8页
  • 作者单位

    West Pomeranian Univ Technol Fac Chem Technol &

    Engn Dept Physicochem Nanomat Piastow Ave 42 PL-71065 Szczecin Poland;

    West Pomeranian Univ Technol Fac Chem Technol &

    Engn Dept Physicochem Nanomat Piastow Ave 42 PL-71065 Szczecin Poland;

    West Pomeranian Univ Technol Fac Chem Technol &

    Engn Dept Physicochem Nanomat Piastow Ave 42 PL-71065 Szczecin Poland;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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