A Novel Route for Preparation of Hollow Carbon Nanospheres Without Introducing Template

Abstract

A newly developed route for the synthesis of hollow carbon nanospheres without introducing template under hydrothermal conditions was reported. Hollow carbon nanospheres with the diameter of about 100 nm were synthesized using alginate as reagent only. Many instruments were applied to characterize the morphologies and structures of carbon hollow nanospheres, such as XRD, TEM, and Raman spectroscopy. The possible formation and growth mechanism of carbon hollow spheres were discussed on the basis of the investigation of reaction influence factors, such as temperature, time, and content. The findings would be useful for the synthesis of more materials with hollow structure and for the potential use in many aspects. The loading of SnO2on the surface of carbon hollow spheres was processed, and its PL property was also characterized.

Carbon nanospheres: synthesis, physicochemical properties and applications

“…These authors used glucose as a starting material and sodium dodecyl sulfate as the anionic surfactant, at 180 C. 59 Li et al managed to produce hollow carbon nanospheres with diameters of ca. 100 nm and poor crystallinity using alginate as the only precursor of the hydrothermal synthesis, also at 180 C. 60 Some works have reported the preparation of carbon nanospheres via a reduction mechanism. Sawant et al prepared hollow carbon spheres using CCl 4 as the carbon source, copper as reductant and CuCl 2 as a promoter, in an autoclave at 200 C. The spheres obtained presented diameters in the range 100 nm-1 mm, poor crystallinity and appreciable (ca.…”

Hydrothermal synthesis and characterization of carbon nanospheres: a mechanistic insight

“…Template mediated synthesis was done using tri-block copolymer pluronic and phenolic resol as carbon source [15]. Hollow carbon nanospheres of 100 nm were reported without introducing template-using alginate [16]. Carbon nanospheres with diameters ∼200 nm were formed from glucose at 200˚C by a novel composite-molten-salt (CMS) method [17].…”

“…15 Hollow carbon nanospheres of 100 nm were reported without introducing template-using alginate. 16 Carbon nanospheres with diameters of $200 nm were formed from glucose at 200 C by a novel composite-molten-salt (CMS) method. 17 CNS with a diameter of 50-250 nm were produced through a one-step solvothermal process at about 300 C. In this method benzene and C 2 Cl 6 acted as carbon sources; Al and AlCl 3 served as the substrate and catalyst, respectively.…”

Generation of open-ended, worm-like and graphene-like structures from layered spherical carbon materials

“…39,40 This is due to their large pore volume, high surface area and the ability to tailor the diameters of the carbon shells. These nanostructured materials have been synthesized by hydrothermal carbonization, 41 templating,…”