Nano magnetite decorated multiwalled carbon nanotubes: a robust nanomaterial for enhanced carbon dioxide adsorption

2011 ◽  
Vol 4 (3) ◽  
pp. 889-895 ◽  
Author(s):  
Ashish Kumar Mishra ◽  
Sundara Ramaprabhu
Keyword(s):  
Carbon Dioxide ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Carbon Dioxide Adsorption ◽  
Multiwalled Carbon

scholarly journals CVD Synthesis, Functionalization and CO2 Adsorption Attributes of Multiwalled Carbon Nanotubes

Processes ◽  
2019 ◽  
Vol 7 (9) ◽  
pp. 634 ◽  
Author(s):  
Shazia Shukrullah ◽  
Muhammad Yasin Naz ◽  
Norani M. Mohamed ◽  
Khalid A. Ibrahim ◽  
Nasser M. AbdEl-Salam ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Nanotubes ◽  
Adsorption Capacity ◽  
Multiwalled Carbon Nanotubes ◽  
Functional Groups ◽  
Co2 Adsorption ◽  
Breakthrough Curves ◽  
Multiwalled Carbon ◽  
Amine Functionalized ◽  
Co2 Adsorption Capacity

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.

Capture of Carbon Dioxide by Modified Multiwalled Carbon Nanotubes

2010 ◽  
pp. 55-69 ◽  
Author(s):  
Chungsying Lu ◽  
Bilen Wu ◽  
Wenfa Chen ◽  
Yu-Kuan Lin ◽  
Hsunling Bai
Keyword(s):  
Carbon Dioxide ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Multiwalled Carbon

Pretreated multiwalled carbon nanotube adsorbents with amine-grafting for removal of carbon dioxide in confined spaces

RSC Advances ◽  
2014 ◽  
Vol 4 (99) ◽  
pp. 56224-56234 ◽  
Author(s):  
Bin Yang ◽  
Huirong Hu ◽  
Qingni Yu ◽  
Xingwang Zhang ◽  
Zhongjian Li ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Thermal Treatment ◽  
Multiwalled Carbon Nanotubes ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon ◽  
Confined Spaces ◽  
Amine Grafting

Three different methods, including thermal treatment, treatment with HNO3 and O2 oxidation, were used to pretreat multiwalled carbon nanotubes (MWCNTs) before grafting with N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (AEAPS).

Electrochemical behavior of electrodes modified with metalloporphyrin and multiwalled carbon nanotubes for the reduction of oxygen, proton and carbon dioxide

2013 ◽  
Vol 17 (04) ◽  
pp. 259-263 ◽  
Author(s):  
Huazhang Zhao ◽  
Yingyue Chang ◽  
Chuan Liu
Keyword(s):  
Carbon Dioxide ◽  
Carbon Nanotubes ◽  
Electrochemical Performance ◽  
Multiwalled Carbon Nanotubes ◽  
Modified Electrode ◽  
Photoelectron Spectroscopy ◽  
Microbial Fuel Cells ◽  
Iron Porphyrin ◽  
Multiwalled Carbon ◽  
Cobalt Porphyrin

Iron porphyrin and cobalt porphyrin were respectively modified on glassy carbon (GC) electrodes together with multiwalled carbon nanotubes (MWCNTs), and the modified electrodes were characterized by X-ray photoelectron spectroscopy (XPS). Their electrochemical performance for the reduction of oxygen (O2) , proton (H+) and carbon dioxide (CO2) were respectively investigated and compared by cyclic voltammetry (CV). The results showed that iron porphyrin-MWCNT modified electrode always had a better performance than cobalt porphyrin-MWCNT modified electrode. It is proposed that iron porphyrin-MWCNT modified electrode will have promising application in electrochemical architectures like microbial fuel cells (MFCs) and microbial electrolysis cells (MECs) for its good biocompatibility, easy availability, as well as excellent electrochemical performance.

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