Flexible cage-like carbon spheres with ordered mesoporous structures prepared via a soft-template/hydrothermal process from carboxymethylcellulose

Abstract

Carbon microspheres with flexible surface morphology and ordered mesoporous structure can be controllably obtained via a soft-template/hydrothermal process.

Fused sphere carbon monoliths with honeycomb-like porosity from cellulose nanofibers for oil and water separation

“…PF 127 is also reported to form micelles 35 that could form the cavities several micrometers across. 4,36 Other studies using starch 23 and glucose 37 have reported distinct carbon spheres, 5,38 while a study by Zhu et al 39 reported organic self-assembly of mesoporous carbon spheres from the formation of PF 127 micelles that act as a core for the hydrochar shell during HTT. A similar phenomenon is observed in this study and is conrmed for PF 127 forming micelles 1 mm across ( Fig.…”

“…Porous carbon materials are known to be optimal for adsorption, 1 electrochemical, 2 and catalyst media 3 applications due to its inertness, surface morphology and high surface area. Precisely due to the stability of carbon, developments in improving the performance of carbon-based products have been usually on increasing the surface area or determining methods of controlling the microstructure 4,5 instead. Achieving high porosity in carbon materials is normally performed using a 2-step activation process using KOH 6 or H 2 O steam 7 as the oxygen source to induce micropores on the surface of the carbon.…”

Preparation of mesoporous double‐layer carbon microsphere‐based solid acid catalyst by hydrothermal method and its application in catalytic transesterification of waste frying oil

“…Wu et al . used carboxymethyl cellulose as a carbon source and a triblock copolymer pluronic F127 as a soft template to synthesize carbon microspheres by the hydrothermal method, achieving a high specific surface area of 410.5 m 2 /g and a tunable mesoporous structure . Ren prepared a tin(IV)oxide (SnO 2 )/carbon composite with a specific surface area of 44.92 m 2 /g by using silica dioxide as a template and glucose as a carbon source after the hydrothermal process and calcination …”

Effect of reaction time on structure of ordered mesoporous carbon microspheres prepared from carboxymethyl cellulose by soft-template method

“…The adjacent spheres then polymerize, and are cross-linked by hydrogen bonds and reactive functional groups on the surface of the intermediate products. The spherical aggregates of the primary particles are then produced (Wu et al, 2014). 3.2.…”

“…It can be used to avoid the pyrolytic effect caused by the crystallinity of common cellulose, as the cellobiose molecules can be surrounded by water (Kroger et al, 2013). Our group has used CMC and triblock copolymer F127 to prepare carbon microspheres with different surface morphologies by self-assembly using the hydrothermal approach; the concentration of F127 had a direct influence on the morphology of the carbons (Wu et al, 2014).…”