Amphiphilic Hollow Carbonaceous Microspheres with Permeable Shells

Abstract

An inside job: Porous hollow carbonaceous microspheres can be easily fabricated by hydrothermal treatment of Saccharomyces cerevisiae cells. An amphiphilic surface and porous shell structure endow these microspheres with phase‐transfer features and the ability to enrich proteins inside their hollow interiors. These characteristics will enable their application in drug delivery, active ingredients encapsulation, adsorption, and separation techniques.

One-pot hydrothermal synthesis of carbonaceous spheres with variable sizes from aqueous monosaccharides solutions

“…1513 cm -1 which reveal the aromatization of the samples which is the normal tendency for a carbonization process [2,20]. The XRD patterns display the amorphous nature of the as-obtained glucose-and fructose-derived CSs (Fig.…”

“…5a displays the IR spectra of glucose-derived CSs, the bands at 1710 and 1620 cm -1 , together with the band at 1513cm -1 , attributed to C=O (carbonyl, quinone, carboxyl, or ester) and C=C vibrations, respectively, whilst the bands in the 1000-1450 cm -1 region correspond to C-O (hydroxyl, ether, or ester) stretching. The bands at 875-750 cm -1 are assigned to aromatic C-H out-of-plane bending vibrations, whereas the bands at approximately 2900 and 3000-3700 cm -1 correspond to stretching vibrations of aliphatic C-H and O-H (carboxyl or hydroxyl), respectively [2,[19][20][21]. The IR spectra of fructose-derived CSs, Fig.…”

Structural properties of carbon microspheres obtained by hydrothermal treatment of fructose

“…It has been reported that treatment by hydrothermal method of different carbohydrates in aqueous solution results in the formation of solid carbonaceous micro particles. In these works, obtained particles are regular spheres in the size range of 0.3-10 µm [8,9,12,13,[15][16][17][18]. Some of these works widely explain dehydration process and formation of carbon microspheres using saccharides such as glucose, starch, sucrose and cellulose.…”

High Porosity Supermacroporous Polystyrene Materials with Excellent Oil–Water Separation and Gas Permeability Properties

“…In our previous studies, 29,30 amphiphilic hollow carbonaceous microspheres (CMs) were synthesized via mild hydrothermal treatment of yeast cells. The wettability of CMs could be facilely tuned by adjusting the hydrothermal treatment temperature during synthesis and Pickering emulsions could be formed when these amphiphilic CMs were dispersed in water− oil biphasic media.…”