Three-step-in-one synthesis of supercapacitor MWCNT superparamagnetic magnetite composite material under flow

Abstract

Composites of multi-walled carbon nanotubes (MWCNTs) and superparamagnetic magnetite nanoparticles, Fe3O4@MWCNT, were synthesized in DMF in a vortex fluidic device (VFD).

Thin Film Mechano-Energy Induced Slicing of Carbon Nanotubes under Flow

“…For the sliced MWCNTs there are two regions of weight loss: 10 and 20 wt % between 160 and 390 °C and between 400 and 650 °C, respectively. The differences in the weight loss between the two materials is attributed to the uptake of solvent ( o -xylene/water) during processing in the VFD, as the internal spaces of the MWCNTs are exposed on slicing …”

“…The differences in the weight loss between the two materials is attributed to the uptake of solvent (o-xylene/ water) during processing in the VFD, as the internal spaces of the MWCNTs are exposed on slicing. 36 Raman spectroscopy was used to provide more information about ordered and disordered (damaged) structures of CNTs. Raman spectra were recorded using a 532 nm excitation laser, and there are two major peaks, the G and D bands, which correspond to the ordered structure and defects structure, respectively.…”

“…There are two common types of operating a VFD: the confined mode, where a specific volume of liquid is processed in the rapidly rotating tube, and the up-scaled continuous flow mode which, for research purposes, uses a syringe pump to constantly deliver liquids into the rapidly rotating tube. The VFD has utility in a wide range of applications, and in the context of the present study on nanofabrication, they include the exfoliation of two-dimensional layered materials, as in graphene and boron nitride, transforming graphene oxide sheets into scrolls, transforming graphite into highly conducting graphene scrolls, decorating carbon nanomaterials with metal nanoparticles, − the synthesis of carbon dots, and fabrication of self-assembled C 60 tubules using water as an “antisolvent” . Other applications of the VFD include controlling chemical reactivity and selectivity, protein folding, enhancing enzymatic reactions, and protein immobilization …”

Vortex Fluidic Mediated Synthesis of TiO2 Nanoparticle/MXene Composites

“…[33] The VFD is a versatile thin film device effective for a growing number of applications, including in situ decorating h-BN with magnetite nanoparticles, [34] fabricating carbon dots from multi-walled carbon nanotubes, [35] chemo selective hydrogenation using cellulose impregnated with Pd NPs lining the VFD tube, [36] organic synthesis, [37][38] probing the structure of self-organised systems, [39][40] exfoliation and scrolling of h-BN and graphite, [41][42][43] slicing CNTs, [44][45] to mention a few. [41,[46][47][48][49][50][51][52][53][54] The VFD typically houses a borosilicate glass tube (O.D. diameter 20 mm, I.D.…”

“…This is a proven approach for then translating any reaction into a continuous flow process, which is the other mode of operation of the VFD, Figure . The VFD is a versatile thin film device effective for a growing number of applications, including in situ decorating h ‐BN with magnetite nanoparticles, fabricating carbon dots from multi‐walled carbon nanotubes, chemo selective hydrogenation using cellulose impregnated with Pd NPs lining the VFD tube, organic synthesis, probing the structure of self‐organised systems, exfoliation and scrolling of h ‐BN and graphite, slicing CNTs, to mention a few . The VFD typically houses a borosilicate glass tube (O.D.…”