Synthesis of high purity multi-walled carbon nanotubes over Co-Mo/MgO catalyst by the catalytic chemical vapor deposition of methane

Investigations on the effects of CoOx to MoOx ratio and CoOx–MoOx loading on methane decomposition into carbon nanotubes

“…In our previous findings, MoO x was found to be an effective promoter for CoO x used for producing CNTs of better morphology and yield [15]. Particularly relevant to the current work, the significance of Co-Mo catalysts supported on various oxides for the synthesis of CNTs has also been reported by other research groups lately [16][17][18][19][20][21][22]. Co-Mo catalysts have effectively been used to grow single-walled carbon nanotubes from carbon monoxide [20,21] or alcohol [22].…”

Preparation and characterization of polyamide 6 nanocomposites using MWCNTs based on bimetallic Co-Mo/MgO catalyst

“…The MWCNTs were prepared by chemical vapor deposition of methane on bimetallic Co-Mo/MgO catalyst [19]. Briefly, materials were accurately weighed and dissolved in a proper amount of water and mixed at 90°C to form a purple gel.…”

“…Our research group has been working on the synthesis of CNT for several years [16][17][18] and have synthesized MWCNTs with different aspect ratios and purity on various catalysts. Specifically, recently, we have produced CNT on a pilot plant scale [19]. In the present study, MWCNTs were produced using the catalytic chemical vapor deposition (CCVD) method on bimetallic Co-Mo/MgO catalyst in a rotary tubular reactor.…”

The role of molybdenum in Co-Mo/MgO for large-scale production of high quality carbon nanotubes

“…The growth process of CNTs was carried out in a simple CVD reaction assembly, consisting of a horizontal tubular furnace and a quartz tube as reported previously [12]. Typically, 100 mg of fresh catalyst was placed uniformly on a quartz boat located at the middle of reactor.…”

“…Each catalyst component has its identical role in the catalytic reaction for the growth of CNTs. Molybdenum (Mo), a transition metal, is well known for its role as a promoter of catalysts in the CCVD reaction for CNTs formation [11][12][13][14][15][16]. One of the advantages of adding Mo into the bimetallic catalysts is the ability to manipulate the selectivity of the process towards the formation SWCNTs or MWCNTs by modifying the Mo to active metal ratio [11].…”