Thermochemistry of Nanodiamond Terminated by Oxygen Containing Functional Groups
Abstract
The standard enthalpies of formation at 25 °C of nanodiamonds terminated by oxygen containing functional groups have been investigated by high-temperature oxidation calorimetry. Depending on the amount of oxygen containing functional groups, the nanodiamonds (plus oxygen and hydrogen as represented in the surface functional groups) can be up to 52 kJ mol-1 more stable in enthalpy than graphite, which means that less heat is evolved during oxidation of nanodiamonds terminated by oxygen containing functional groups, since their surface carbon is already partially oxidized. The stability of the nanodiamonds terminated by oxygen containing functional groups increases (enthalpy of formation becomes more negative) with increasing surface area within the studied range, reflecting the dominant effect of higher content of surface functional groups over the destabilizing effect of higher surface-to-volume ratio typical for nanoparticles.
Recommended Citation
G. C. Costa et al., "Thermochemistry of Nanodiamond Terminated by Oxygen Containing Functional Groups," Carbon, vol. 80, no. 1, pp. 544 - 550, Elsevier Limited, Jan 2014.
The definitive version is available at https://doi.org/10.1016/j.carbon.2014.08.094
Department(s)
Chemistry
Research Center/Lab(s)
Center for High Performance Computing Research
International Standard Serial Number (ISSN)
0008-6223
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2014 Elsevier Limited, All rights reserved.
Publication Date
01 Jan 2014
