TY - JOUR
T1 - Dispersion of nickel nanoparticles in the cages of metal-organic framework
T2 - An efficient sorbent for adsorptive removal of thiophene
AU - Aslam, Sobia
AU - Subhan, Fazle
AU - Yan, Zifeng
AU - Etim, U. J.
AU - Zeng, Jingbin
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017
Y1 - 2017
N2 - 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.
AB - 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.
KW - Desulfurization
KW - Isotherm equation
KW - Kinetic
KW - Ni-MIL-101(Cr)
KW - Thiophene
UR - http://www.scopus.com/inward/record.url?scp=85010825801&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2017.01.047
DO - 10.1016/j.cej.2017.01.047
M3 - 文章
AN - SCOPUS:85010825801
SN - 1385-8947
VL - 315
SP - 469
EP - 480
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -