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The Role of Multiwall Carbon Nanotubes in Cu‐BTC Metal‐Organic Frameworks for CO 2 Adsorption
Author(s) -
Ullah Sami,
Shariff Azmi Mohd.,
Bustam Mohamad Azmi,
Elkhalifah Ali Eltayeb Ibrahim,
Gonfa Girma,
Kareem Firas Ayad Abdul
Publication year - 2016
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201600277
Subject(s) - physisorption , high resolution transmission electron microscopy , thermogravimetric analysis , metal organic framework , adsorption , intercalation (chemistry) , chemical engineering , chemistry , fourier transform infrared spectroscopy , sorption , carbon nanotube , bet theory , hybrid material , specific surface area , field emission microscopy , transmission electron microscopy , nanotechnology , inorganic chemistry , materials science , organic chemistry , diffraction , catalysis , engineering , physics , optics
The discovery of natural gas fields with a high content of CO 2 in world gas reservoirs poses new challenges for CO 2 capture. This work investigates the use of the metal‐organic framework (MOF) Cu‐BTC and hybrid MWCNTs@Cu‐BTC for CO 2 adsorption. Cu‐BTC and hybrid MWCNTs@Cu‐BTC were synthesized by the solvothermal method. The results of imaging of intact MOF pores in Cu‐BTC and hybrid MWCNTs@Cu‐BTC nanocrystals by high‐resolution transmission electron microscopy (HRTEM) under liquid nitrogen conditions are presented. Physical characterizations of the solid adsorbents were made by using a selection of different techniques, including field‐emission scanning electron microscopy (FESEM), X‐ray powder diffraction (XRD), Fourier transform infrared (FT‐IR) spectroscopy, thermogravimetric analysis (TGA), Brunauer–Emmet–Teller (BET) surface area, and CO 2 adsorption and physisorption measurements. HRTEM and FESEM confirmed that Cu‐BTC has an octahedral shape and that the surface morphology of Cu‐BTC changes by the intercalation of MWCTNs. The results show that the modified Cu‐BTC improved the CO 2 adsorption compared to pure Cu‐BTC. The increase in the CO 2 uptake capabilities of hybrid MWCNTs@Cu‐BTC was ascribed to the intercalation of MWCNTs with Cu‐BTC crystals. The CO 2 sorption capacities of Cu‐BTC and hybrid MWCNTs@Cu‐BTC were found to increase from 1.91701 to 3.25642 mmol/g at ambient conditions.