کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6466335 1422963 2017 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dispersion of nickel nanoparticles in the cages of metal-organic framework: An efficient sorbent for adsorptive removal of thiophene
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Dispersion of nickel nanoparticles in the cages of metal-organic framework: An efficient sorbent for adsorptive removal of thiophene
چکیده انگلیسی


- Nickel was fabricated on MIL-101 for the first time by ultrasonic assisted impregnation.
- High surface area and large pore volume of MIL-101 promoted high Ni dispersion.
- The present strategy save time and energy for functionalization of Ni-based MOFs.
- This investigation may open an avenue of research on Ni based MOFs.

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, N2 physisorption, 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.

Adsorptive desulfurization of thiophene on 20Ni-MIL-101 sorbent.234

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 315, 1 May 2017, Pages 469-480
نویسندگان
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