Developing Hollow Carbon Balls by Oxidation of Carbon Blacks

Abstract

The development of hollow carbon balls by CO 2 oxidation of two types of carbon blacks was studied. Super P (SP) and Denka Black (DB) were used for this study. Specific surface area (SSA), structural parameters, and microstructures were examined using Brunauer, Emmett and Teller apparatus, X-ray diffraction spectroscopy, and transmission electron microscope (TEM), respectively. The SSAs of both oxidized carbon blacks increased after oxidation. The SSAs of raw DB and SP were 73 m /g) after 3 h oxidation compared with the original carbon blacks. Through TEM observation the outer parts of the oxidized carbon blacks showed a rigid shell structure and the inner parts looked empty. Generally it looked like an angular soccer ball, so we named it 'hollow carbon ball.' It is expected that the hollow carbon ball can be used as catalyst supports.

The porous structure of activated carbon-based on waste coffee grounds

“…The formation of the 002 peak occurred due to X-ray diffraction on the crystalline part of the NCM, which is a combination of crystalline phases with a large number and a smaller number of defects a combination of soft turbostatic carbon (STC) and hard turbostatic carbon (HTC) [16]. To determine the content of each of the phases, it was assumed that these phases have the same chemical composition and the ratio of the integral diffraction intensities is proportional to the corresponding ratios of their masses (Fig.…”

Improved Oxidation Resistance of Graphite Block by Introducing Curing Process of Phenolic Resin

“…The oxidation reactions of graphite occur primarily at active sites located at the ends of the basal planes of graphite crystals, which are found on pore walls [14]. During the carbonization process in graphite block manufacturing, organic matter from phenolic resin is pyrolyzed into carbon, while the remaining volatile matter is released into the atmosphere to form open pores in the graphite blocks [15][16][17].…”