Two bimetallic metal–organic frameworks capable of direct photocatalytic degradation of dyes under visible light

  • Lijuan Feng
  • Guojian RenEmail author
  • Fuxiang Wang
  • Weiting YangEmail author
  • Guangshan Zhu
  • Qinhe PanEmail author


Two bimetallic metal–organic frameworks (MOFs), specifically {2[LiM(TDA)2(DMF)]·NH2+(CH3)2}n (M = Co (HNU-29) or Zn (HNU-30), TDA = 2,5-thiophenedicarboxylate), were synthesized by solvothermal methods. X-ray crystal structures of the two MOFs showed them to be isostructural. Thus, in both cases, the metal secondary building units were connected by TDA2− ligands to form a 3D framework whose structure can be simplified to the twofold interpenetrated dia net. HNU-29 showed excellent photocatalytic activity for the degradation of methylene blue (MB) under visible light even without the addition of H2O2 as an electron acceptor, remaining stable even after several cycles of reuse. The MB degradation followed first-order kinetics, and the photocatalytic degradation mechanism was found to be related to the effective ligand-to-metal charge transfer within the framework.



This work was supported by the National Natural Science Foundation of China (21761010), the Natural Science Foundation of Hainan Province (217018 and 217055), Hainan University start-up fund (kyqd1654 and KYQD(ZR)1806) and the Opening Project of Key Laboratory of Polyoxometalate Science of Ministry of Education (RERU2018009). Hainan Provincial Graduate Innovation Research Project (Hys2018-55).

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© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Materials and Chemical EngineeringHainan UniversityHaikouChina
  2. 2.Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)Nankai UniversityTianjinChina
  3. 3.College of ChemistryNortheast Normal UniversityChangchunChina

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