Preparation of porous carbon particle with shell/core structure

Abstract

Abstract. Porous carbon particles with a shell/core structure have been prepared successfully by controlled precipitation of the polymer from droplets of oil-in-water emulsion, followed by curing and carbonization. The droplets of the oil phase are composed of phenolic resin (PFR), a good solvent (ethyl acetate) and porogen (Poly(methyl methacrylate), PMMA). The microstructure was characterized in detail by scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption, and thermo gravimetric analysis (TGA). The obtained carbon particles have a capsular structure with a microporous carbon shell and a mesoporous carbon core. The BET surface area and porous volume are calculated to be 499 m 2 g -1 and 0.56 cm 3 g -1 , respectively. The effects of the amount of porogen (PMMA), co-solvent (acetone) and surfactant on the resultant structure were studied in detail.

Energy-Efficient Templating Method for the Industrial Production of Porous Carbon Particles by a Spray Pyrolysis Process Using Poly(methyl methacrylate)

“…PMMA is cost-effective, which will potentially be more profitable on the industrial scale . Although PMMA has been used for films, monoliths, and foam materials, ,,,,,, there have been no reports on the synthesis of porous particles, especially carbon particles, using PMMA as the template in a spray pyrolysis process.…”

“…PMMA is cost-effective, which will potentially be more profitable on the industrial scale. 22 Although PMMA has been used for films, monoliths, and foam materials, 2,6,7,12,21,23,24 there have been no reports on the synthesis of porous particles, especially carbon particles, using PMMA as the template in a spray pyrolysis process. The current work demonstrates, for the first time, the synthesis of porous carbon particles with exceptionally high surface area using PMMA as the template through a one-pot facile spray pyrolysis process.…”

Cellulose generated-microporous carbon nanosheets with nitrogen doping

“…Several special morphology endowed porous carbon excellent properties. For example, carbon nanotubes conned metal particles with unique properties in chemical reactions; 5 carbon nanotube with extremely high tensile strength was controlled wall thick by CVD connected with catalyst; 6 cubic ordered mesostructured carbide-derived carbons offered excellent hydrocarbon storage capacitance and good performance as electrode material for supercapacitors; 7 shell-core structure porous carbon displaying power density of 11.7 kW kg À1 was obtained using spherical silica as template 8 or controlling phase transferring; 9 nanosheet graphene having excellent reversible capacity of 1040 mA h g À1 at 100 mA g À1 was synthesized by controlled low-concentration monomicelle close-packing assembly approach. 10 Heteroatoms like N and B introduced into porous carbon matrix greatly enhanced electronic chemistry performance due to pseudocapacitive effect, 11 increased adsorption properties for polar molecules because of its basic surface groups, 12 promoted dispersion of catalyst particle and enhanced the interaction of support and catalyst particle, 13 etc.…”

Exploring the Interior of Hollow Fluorescent Carbon Nanoparticles

“…27,28 Recently, carbon particles with microporous shell and mesoporous core were prepared through internal phase separation within the droplets of an oilin-water emulsion. 29 In attempts for better and simplified synthetic techniques to prepare hollow carbon nanoparticles (HCNs), a few methods came up that produce excellent size distribution for the HCNs. 30,31 A self-assembly approach using hexachlorobenzene and sodium (Na) had been adopted to obtain 50−100 nm HCNs.…”

“…Simple processes such as oxidation of candle soot to prepare CNs have been attempted. , Depending on a specific application area, various methods have been applied for synthesis of CNs with different structures and morphologies. − Silica template has been used to prepare CNs with ordered pore structure for the application to catalysis and electrochemistry. − Polymer as porogen to prepare porous carbon is another efficient method. Reaction-induced phase separation of miscible polymer blends have been applied in recent past to prepare nanostructure carbonaceous material with continuous pores. , Recently, carbon particles with microporous shell and mesoporous core were prepared through internal phase separation within the droplets of an oil-in-water emulsion …”