Cycloaddition of CO2to propylene oxide using BiNbO4/NH2-MIL-125(Ti) composites as visible-light photocatalysts

Maram Bakiro, Salwa Hussein Ahmed, Ahmed Alzamly

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


A series of BiNbO4/NH2-MIL-125(Ti) hybrid photocatalysts was prepared using different mass ratios of NH2-MIL-125(Ti) to BiNbO4. The crystalline structure of the prepared photocatalysts was analyzed using PXRD. The heterojunction was established as indicated by analyzed peaks correspond to both materials added to the composite, and the intensity in the heterojunction correlates with increasing the amount of BiNbO4 added. Surface area was obtained using N2 adsorption isotherm. The surface area and porosity were increased significantly upon increasing the amount of NH2-MIL-125(Ti) added. Band gap measurements exhibited a red shift towards lower energy values upon increasing the amount of NH2-MIL-125(Ti). Furthermore, the activity of prepared BiNbO4/NH2-MIL-125(Ti) hybrid photocatalysts was examined for the cycloaddition of CO2 to propylene oxide as a photocatalytic model reaction. Interestingly, no polymeric material was observed and selective cyclic propylene carbonate in moderate yield was obtained. Noticeably, the activity of BiNbO4/NH2-MIL-125(Ti) was highest upon the addition of 50 % NH2-MIL-125(Ti) by mass reaching up to 74 % conversion.

Original languageEnglish
Article number104461
JournalJournal of Environmental Chemical Engineering
Issue number6
Publication statusPublished - Dec 2020


  • Band gap
  • BiNbO/NH-MIL-125(Ti)
  • Hybrid material
  • Photocatalyst
  • Red shift
  • Visible-Light

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Waste Management and Disposal
  • Pollution
  • Process Chemistry and Technology


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