The formation of onion-like carbon-encapsulated cobalt carbide core/shell nanoparticles by the laser ablation of metallic cobalt in acetone

Synthesis of grape-like carbon nanospheres and their application as photocatalyst and electrocatalyst

“…diagnostic of the structural order [22]. The broad D-band in the Raman spectrum indicates the presence of amorphous carbon or defects arising from disordered carbon layers or the incorporation of hydrogen or oxygen atoms within the graphite layer [31,32] which matches well with the TEM/EDS results also. The intensity ratio of I D to I G is also used to estimate the disorder in the structure.…”

Functionalization of nanomaterials with aryldiazonium salts

“…For example, iron, cobalt and nickel are employed for ferrofluids, catalysis and bio-imaging purposes. Their encapsulation by carbon prevents their oxidation and agglomeration [147]. Metal (Fe, Co, Ni, Ag) and carbide (Fe 3 C) nanoparticles were subjected to diazonium surface modification in aqueous solutions with or without surfactants [148,149] with reasonable grafting densities.…”

Cyclic voltammetry as a tool for model testing of catalytic Pt- and Ag-doped carbon microspheres

“…Their diameters range from 10 nm to 10 µm while their specific surface areas are from 2 m 2 g -1 to 1500 m 2 g -1 . Concepts of CMS syntheses include arch discharge [3], laser ablation [4], plasma processes [5], shock compression techniques [6], chemical vapor deposition [7], and hydrothermal treatments in autoclave (catalytic and non-catalytic) [8].…”