Chinese Journal of Catalysis ›› 2019, Vol. 40 ›› Issue (9): 1339-1344.DOI: 10.1016/S1872-2067(19)63329-2

• Communication • Previous Articles     Next Articles

Development of a bismuth-based metal-organic framework for photocatalytic hydrogen production

Yejun Xiaoa,b, Xiangyang Guoa, Junxue Liuc, Lifang Liua,b, Fuxiang Zhanga, Can Lia   

  1. a State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, the Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian 116023, Liaoning, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China;
    c State Key Laboratory of Molecular Reaction Dynamics, the Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
  • Received:2018-12-20 Online:2019-09-18 Published:2019-07-06
  • Contact: S1872-2067(19)63329-2
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (21633009, 21522306, 21633010), DICP&QIBEBT (UN201805), and the Dalian Science Foundation for Distinguished Young Scholars (2017RJ02).

Abstract: A novel 3D bismuth-organic framework (called Bi-TBAPy) single crystal was synthesized by employing 1,3,6,8-tetrakis(p-benzoic acid)pyrene (H4TBAPy) as an organic linker. The study demonstrates that the Bi-TBAPy not only possesses good chemical stability and suitable band edge positions for promising photocatalytic H2 evolution, but it also exhibits a typical ligand-to-metal charge transfer for favorable charge separation. The photocatalytic H2 evolution rates on the as-obtained Bi-TBAPy with different cocatalysts modified were examined with triethanolamine as the sacrificial reagent. Based on this, the hydrogen evolution rate of 140 μmol h-1 g-1 was obtained on the optimized sample with a loading of 2 wt% Pt as a cocatalyst. To the best of our knowledge, this is the first bismuth-based metal-organic framework (MOF) that functions as an effective photocatalyst for photocatalytic water reduction. Our study not only adds a new member to the family of photocatalyst materials, but also reveals the importance of cocatalyst modification in improving photocatalytic activity of MOFs.

Key words: Metal-organic framework, Photocatalysis, Water reduction, Ligand-to-metal charge transfer, Charge separation