Type

Journal Article

Authors

Brett Paull
Pavel Nesterenko
A. Dey
Dermot Brabazon
Ekaterina Nesterenko
Xiaoyun He
E. Duffy

Subjects

Physics

Topics
carbon carbon composites materials controlled growth x ray photoelectron spectroscopy mechanical engineering particle size raman spectroscopy high resolution

Thermally controlled growth of carbon onions within porous graphitic carbon-detonation nanodiamond monolithic composites (2015)

Abstract Unique porous carbon monoliths containing thermally annealed carbon onions, were prepared from a resorcinol formaldehyde precursor rod, containing silica gel acting as a hard template, detonation nanodiamond, and Fe3+ as a graphitisation catalyst. Detonation nanodiamond was converted to carbon onions during controlled pyrolysis under N2, where the temperature cycle reached a maximum of 1250 C. Thermal characterisation and high resolution electron microscopy have confirmed the graphitisation of nanodiamond, and revealed the resulting quasi-spherical carbon onions with an average particle size of 5.24 nm. The bimodal porous composite contains both macropores (5 mm) and mesopores (10 nm), with a BET surface area of 214 m2g for a nanodiamond prepared monolith (0.012 wt% nanodiamond in the precursor mixture), approximately twice that of blank monoliths, formed without the addition of nanodiamond, thus providing a new approach to increase surface area of such porous carbon rods. Raman spectroscopy and X-ray photoelectron spectroscopy also confirmed an enhanced graphitisation of the monolithic carbon skeleton resulting from the elevated thermal conductivity of the added nanodiamond. TEM imaging has confirmed the nanodiamond remains intact following pyrolysis at temperatures up to 900 C.
Collections Ireland -> Dublin City University -> Publication Type = Article
Ireland -> Dublin City University -> Status = Published
Ireland -> Dublin City University -> Subject = Engineering: Mechanical engineering
Ireland -> Dublin City University -> Subject = Engineering: Materials
Ireland -> Dublin City University -> DCU Faculties and Centres = Research Initiatives and Centres: Irish Separation Science Cluster (ISSC)

Full list of authors on original publication

Brett Paull, Pavel Nesterenko, A. Dey, Dermot Brabazon, Ekaterina Nesterenko, Xiaoyun He, E. Duffy

Experts in our system

1
Brett Paull
Dublin City University
Total Publications: 120
 
2
Pavel N Nesterenko
Dublin City University
Total Publications: 41
 
3
Dermot Brabazon
Dublin City University
Total Publications: 162