On the selective oxidation of H2S by heavy loaded Nanoparticles Embedded in Mesoporous Matrix (NEMMs)

Georgia Basina, Omer Elmutasim, Dina Ali Gaber, Safa Ali Gaber, Xinnan Lu, Vasileios Tzitzios, Balasubramanian V. Vaithilingam, Maria Baikousi, Georgios Asimakopoulos, Michael A. Karakassides, Ioannis Panagiotopoulos, Konstantinos Spyrou, Eleni Thomou, Elias Sakellis, Nikos Boukos, Dandan Xu, Michael Tsapatsis, Nahla Al Amoodi, Yasser Al Wahedi

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


In this work, we present a facile methodology for catalysts synthesis which allows for achieving active component loadings up to 82 w.t.% while controlling the size (2 nm–20 nm), morphology and phase. The active component nanoparticles are synthesized to the desired size, shape and morphology in an organic environment and then are transferred to an aqueous environment wherein the support is grown around the nanoparticles. We demonstrate the efficacy of this methodology in the selective oxidation of H2S using γ-Fe2O3/meso-SiO2 as the catalyst. Our results suggest that the optimal catalyst comprised of γ-Fe2O3 spherical nanoparticles of size ranging from 5 to 7 nm, at a loading ranging from 57 to 73 w.t.%, achieve 100 % conversion and >90 % selectivity towards sulfur at the gas hourly space velocities of 166,640 h−1 and 82,820 h−1. The methodology presented herein can be extended to many other catalytic systems.

Original languageBritish English
Article number119338
JournalApplied Catalysis B: Environmental
StatePublished - 5 Dec 2020


  • Colloidal synthesis
  • FeO/SiO nanostructures
  • Iron oxides catalyst
  • Mesoporous silica support
  • Selective oxidation HS


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