Dispersion of nickel nanoparticles in the cages of metal-organic framework: An efficient sorbent for adsorptive removal of thiophene

Sobia Aslam, Fazle Subhan*, Zifeng Yan, U. J. Etim, Jingbin Zeng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Nickel NPs (<2 nm) were confined in highly porous metal organic framework (MOF; here, MIL-101(Cr)) via a facile strategy at ambient conditions. With the characterization of HRTEM, XRD, N2physisorption, SEM, XPS, TPR, FT-IR, NH3-TPD, ICP-OES, and TG-DTG, the resulting nickel NPs up to 20 wt% first-ever were detected to be uniformly dispersed, smaller in size and easily reducible in MIL-101(Cr) cages retaining their original crystal structure. The efficiencies of the new sorbents in adsorptive removal of thiophene were investigated. Compared with pristine MIL-101, the capacity of sulfur adsorption of modified MIL-101 enhanced for thiophene, and obey the order 20Ni-MIL-101 > 10Ni-MIL-101 > 30Ni-MIL-101 > MIL-101. The improved adsorption properties were linked with surface chemistry and texture of MIL-101 support. Pseudo second-order kinetic and Langmuir models showed best fit of thiophene adsorption on MIL-101 and Ni-containing MIL-101 samples. Moreover, the rate controlling step for thiophene adsorption was intraparticle diffusion.

Original languageEnglish
Pages (from-to)469-480
Number of pages12
JournalChemical Engineering Journal
Volume315
DOIs
StatePublished - 2017
Externally publishedYes

Keywords

  • Desulfurization
  • Isotherm equation
  • Kinetic
  • Ni-MIL-101(Cr)
  • Thiophene

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