Abstract
Soluble, oxidized, nanodiamond-derived carbon nano-onions (ON-CNOs) were synthesized by treatment of nanodiamond-derived carbon nano-onions (N-CNOs) with a mixture of fuming sulfuric acid (20 % SO3 in H2SO4, oleum) and conc. nitric acid. ON-CNOs dissolve in polar organic solvents and water due to the presence of acidic functional groups on both the nano-onion surface and adsorbed polycyclic aromatic adsorbents, also called carboxylated carbonaceous fragments (CCFs). The CCFs were removed by either base treatment or thermal desorption and characterized by matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). The structure and distribution of functional groups on ON-CNOs before and after CCF removal were studied by thermogravimetric analysis, transmission electron microscopy, pH-titrimetry, Raman spectroscopy and Fourier-transform infrared spectroscopy (FT-IR).
Original language | English |
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Article number | 101966 |
Journal | Materials Today Communications |
Volume | 26 |
DOIs | |
State | Published - Mar 2021 |
Bibliographical note
Publisher Copyright:© 2020 Elsevier Ltd
Funding
We are grateful to the National Science Foundation (Center for Advanced Materials , Grant EPS-0814194 ), National Institute for Hometown Security ( HSHQDC-07-3-00005 ) and the University of Kentucky for financial support.
Funders | Funder number |
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National Institute for Hometown Security | HSHQDC-07-3-00005 |
National Science Foundation (NSF) | EPS-0814194 |
University of Kentucky |
Keywords
- Carbon nano-onions
- Characterization
- Functionalization
- MALDI
- Nanodiamonds
- Oxidized carbon nanomaterials
- Polycyclic aromatic hydrocarbons
- Raman analysis
- Surface adsorbents
- Thermal desorption
- pH-metric titration
ASJC Scopus subject areas
- General Materials Science
- Mechanics of Materials
- Materials Chemistry