Preparation of coal fly ash derived metal organic frameworks and their carbon derivatives

Khavharendwe M. Rambau, Nicholas M. Musyoka, Rafal Panek, Wojciech Franus, Magdalena Wdowin, Ncholu Manyala

Research output: Journal PublicationArticlepeer-review

9 Citations (Scopus)


In this study, a new strategy for preparing metal organic frameworks (MOFs) using coal fly ash (CFA) as a metal feedstock is introduced. Aluminium and other metal species were leached out from CFA using sulfuric acid and reacted with fumaric acid following a procedure that had been optimized to mimic Aluminium fumarate MOF (Al-FumMOF). Despite the presence of different metals in the synthesis solution, the prepared coal fly ash derived MOF (CFA-FumMOF) exhibited almost similar characteristics to Al-FumMOF synthesized using commercial chemicals. In this case, the surface area of 1236 m2/g was obtained for CFA-FumMOF, whereas that of Al-FumMOF was 1266 m2/g. For pore enhancement, the prepared CFA-FumMOF was subjected to direct carbonization and resulted in improved surface area (i.e. increase from 1236 m2/g to 2017 m2/g). The developed innovative strategy of using CFA leachate in MOF synthesis has the potential for lowering the cost of producing MOFs as well as create a new route for value-addition of the waste CFA for many applications.

Original languageEnglish
Article number102433
JournalMaterials Today Communications
Publication statusPublished - Jun 2021
Externally publishedYes


  • Aluminium fumarate metal organic framework
  • Coal fly ash
  • Coal fly ash derived metal organic framework
  • Metal organic framework derived carbons

ASJC Scopus subject areas

  • Materials Science (all)
  • Mechanics of Materials
  • Materials Chemistry


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