LAPSE:2019.1223
Published Article
LAPSE:2019.1223
CVD Synthesis, Functionalization and CO2 Adsorption Attributes of Multiwalled Carbon Nanotubes
Shazia Shukrullah, Muhammad Yasin Naz, Norani M. Mohamed, Khalid A. Ibrahim, Nasser M. AbdEl-Salam, Abdul Ghaffar
November 24, 2019
Carbon dioxide is one of the major greenhouse gases and a leading source of global warming. Several adsorbent materials are being tested for removal of carbon dioxide (CO2) from the atmosphere. The use of multiwalled carbon nanotubes (MWCNTs) as a CO2 adsorbent material is a relatively new research avenue. In this study, Fe2O3/Al2O3 composite catalyst was used to synthesize MWCNTs by cracking ethylene gas molecules in a fluidized bed chemical vapor deposition (CVD) chamber. These nanotubes were treated with H2SO4/HNO3 solution and functionalized with 3-aminopropyl-triethoxysilane (APTS). Chemical modification of nanotubes removed the endcaps and introduced some functional groups along the sidewalls at defected sites. The functionalization of nanotubes with amine introduced carboxylic groups on the tube surface. These functional groups significantly enhance the surface wettability, hydrophilicity and CO2 adsorption capacity of MWCNTs. The CO2 adsorption capacity of as-grown and amine-functionalized CNTs was computed by generating their breakthrough curves. BELSORP-mini equipment was used to generate CO2 breakthrough curves. The oxidation and functionalization of MWCNTs revealed significant improvement in their adsorption capacity. The highest CO2 adsorption of 129 cm3/g was achieved with amine-functionalized MWCNTs among all the tested samples.
Keywords
CO2 adsorption capacity, fluidized bed CVD, functionalized CNTs, MWCNTs
Subject
Suggested Citation
Shukrullah S, Naz MY, Mohamed NM, Ibrahim KA, AbdEl-Salam NM, Ghaffar A. CVD Synthesis, Functionalization and CO2 Adsorption Attributes of Multiwalled Carbon Nanotubes. (2019). LAPSE:2019.1223
Author Affiliations
Shukrullah S: Department of Physics, University of Agriculture, Faisalabad 38040, Pakistan
Naz MY: Department of Physics, University of Agriculture, Faisalabad 38040, Pakistan
Mohamed NM: Center of Innovative Nanostructures and Nanodevices, Universiti Teknologi PETRONAS, Perak 32610, Malaysia
Ibrahim KA: College of Engineering, Muzahimiyah Branch, King Saud University, Riyadh 11451, Saudi Arabia
AbdEl-Salam NM: Arriyadh Community College, King Saud University, Arriyadh 11437, Saudi Arabia
Ghaffar A: Department of Physics, University of Agriculture, Faisalabad 38040, Pakistan
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Journal Name
Processes
Volume
7
Issue
9
Article Number
E634
Year
2019
Publication Date
2019-09-18
Published Version
ISSN
2227-9717
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Original Submission
Other Meta
PII: pr7090634, Publication Type: Journal Article
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LAPSE:2019.1223
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doi:10.3390/pr7090634
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Nov 24, 2019
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CC BY 4.0
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Nov 24, 2019
 
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Nov 24, 2019
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Original Submitter
Calvin Tsay
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