An improved method for the purification of fullerene from fullerene soot with activated carbon, celite, and silica gel stationary phases

Abstract

The present study reports an eco-friendly, biosynthesis of silver nanoparticles (AgNPs) using stem bark extract of Diospyros montana. Initially, the synthesis of AgNPs was confirmed by visual observation as color change. Further, the morphology of the biosynthesized nanoparticles, average size and presence of elemental silver were characterized by UV-Visible spectroscopy, scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray and dynamic light scattering spectrometer. Qualitative phytochemical screening and FTIR spectral peaks supported the role of phytochemicals in bark extract for the metal reduction, stabilization and capping of silver nanoparticles. XRD studies demonstrated that crystalline nature and their average size of nanoparticles was 28 nm as determined by Scherrer's formula. The antioxidant ability of AgNPs and plant extract was analyzed using DPPH and Hydrogen peroxide assay. The percentage of DPPH and H 2 O 2 activity was increased with increasing concentration of AgNPs. In vitro antibacterial effect of various concentration of AgNPs was investigated against both Gram positive (B.subtilis and S.aureus) and Gram negative (E.coli and K.aerogenes) bacterial strains. The result shows that biosynthesized AgNPs have significant antibacterial activity.

Novel highly stable β-cyclodextrin fullerene mixed valent Fe-metal framework for quick Fenton degradation of alizarin

“…It has unique properties to form composites with various materials, ability to trap substances inside the cage and to act as a photo catalyst etc. [26][27][28] Encapsulation of fullerene to metal oxide provides ability to oxide surface by resisting air oxidation and maintains good magnetic properties. Synthetic strategies to produce nanocomposites of fullerene and magnetic iron oxide nanoparticles have been reported recently.…”

Effect of Metallic and Non-Metallic Additives on the Synthesis of Fullerenes in Thermal Plasma

“…Extraction efficiency varies with the solvent type, where the choice of solvent is based on the solubility of fullerenes. Several solvents exhibit higher fullerene solubility (ortodichlorobenzene 27 mg/mL, phenylnaphtalene 50 mg/mL, cloronaphtalene 51 mg/mL) than observed for toluene (2.8 mg/mL) and, therefore, offer the prospect of improved extraction efficiency [13,[41][42][43]. The extraction and the fullerene content were determined using ortodichlorobenzene (ODCB) for the soot obtained in the presence of 20 wt% Fe.…”

“…The high cost and the insufficient availability of fullerenes raise difficulties for their broader applications [10]. The development of large-scale and low-cost production technologies of fullerenes seems to be a goal of outstanding importance both in scientific and practical terms [11][12][13]. Any study aiming to contribute towards enhancing the production of fullerenes will invariably promote advancements in its applications [14].…”

Fullerene soot and a fullerene nanodispersion as recyclable heterogeneous off-the-shelf photocatalysts

“…For the FS powder, 1 mg of FS was used for 0.2 mmol of substrate. Taking into account that commercial FS contains up to 7% w/w of extractable fullerenes, 17 this translates into substrate to catalyst molar ratios of approximately 20 000 and 2000 for the FS suspension and FS powder, respectively (assuming that all fullerenes in FS are C 60 ). Ethanol (95/5 v/v mixture with water) was used as a green solvent, which is also capable of stabilizing one of the key reaction intermediates (reaction mechanisms are discussed below).…”