Phenolic Resin and Derived Carbon Hollow Spheres

Abstract

Summary: Phenolic formaldehyde (PF) resins are attractive due to their excellent performances such as high temperature resistance, thermal abrasion, and high yield of carbon conversion. In this communication, PF resin‐based composite hollow spheres were fabricated by in situ favorable absorption and catalytic crosslinking of PF resin within sulfonated polystyrene gel layers of the hollow sphere templates at low temperature. The composite hollow spheres were achieved in one step, avoiding traditional removal of template cores. The intact shell was tuned from double‐layered to single‐layered. Carbon hollow spheres with porous shell were derived by carbonization of the PF composite hollow spheres. Metal/carbon composite hollow spheres were further synthesized by the incorporation of metal within the porous shell, which would be a promising material for catalysis.TEM image of carbon double‐shelled hollow spheres after the PF composite spheres are calcined at 800 °C for 2 h in nitrogen.magnified imageTEM image of carbon double‐shelled hollow spheres after the PF composite spheres are calcined at 800 °C for 2 h in nitrogen.

Nitrogen‐Enriched Fe3O4@Carbon Nanospheres Derived from Fe3O4@3‐Aminophenol/Formaldehyde Resin Nanospheres Based on a Facile Hydrothermal Strategy: Towards a Robust Catalyst Scaffold for Platinum Nanocrystals

“…As shown in the FTIR spectra (see the Supporting Information), the broad band between 3700 and 3050 cm −1 is attributed to the N−H and O−H stretching vibrations . The bands at 1630 and 1450 cm −1 correspond to the skeleton vibration in the aromatic rings . The weak peak at 1520 cm −1 is the N−H shearing vibration .…”

Influence of hollow carbon microspheres of micro and nano-scale on the physical and mechanical properties of epoxy syntactic foams

“…22 Polystyrene (PS) spheres used as templates were synthesized using emulsifier-free emulsion polymerization according to the procedure described in the literature. 22 Polystyrene (PS) spheres used as templates were synthesized using emulsifier-free emulsion polymerization according to the procedure described in the literature.…”

Preparation of porous carbon particle with shell/core structure

“…Porous carbon particles are of great interest in column packing, filler, hydrogen storage, supercapacitors, catalyst supports and other applications [1]. Several methods have been developed to prepare spherical carbon [2][3][4][5][6][7][8]. The solid-templating approach has been widely used for the synthesis of a variety of nanoporous carbon materials [5][6][7][8][9].…”

“…Several methods have been developed to prepare spherical carbon [2][3][4][5][6][7][8]. The solid-templating approach has been widely used for the synthesis of a variety of nanoporous carbon materials [5][6][7][8][9]. Although precise control of pore size and pore structures is desirable, it has several limitations such as incomplete and time consuming infiltration of the precursor, laboring and expensive template removal process.…”