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Chromate adsorption mechanism on nanodiamond-derived onion-like carbon
- Authors
- Ko, Young-Jin; Choi, Keunsu; Lee, Soonjae; Cho, Jung-Min; Choi, Heon-Jin; Hong, Seok Won; Choi, Jae-Woo; Mizuseki, Hiroshi; Lee, Wook-Seong
- Issue Date
- 15-12월-2016
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Onion-like carbon; Adsorption; Chromate; Dangling bond; Hydroxyl functional group
- Citation
- JOURNAL OF HAZARDOUS MATERIALS, v.320, pp.368 - 375
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF HAZARDOUS MATERIALS
- Volume
- 320
- Start Page
- 368
- End Page
- 375
- ISSN
- 0304-3894
- Abstract
- The onion-like carbon (OLC) was prepared as adsorbent and tested for the removal of chromate ions from aqueous solutions. The OLC was thermally derived from nanodiamond by vacuum annealing at 1000-2000 degrees C. An investigation was conducted the chromate adsorption mechanism of OLC, by analysing the temperature-dependent evolution of the various oxygen-carbon bonds and the chemisorbed water by X-ray photo electron spectroscopy, as well as by the first principle calculation of the bond energies for relevant bond configurations. The present work demonstrated the importance of the carbon-oxygen bond type and carbon dangling bonds for chromate adsorption, as well as for other anionic heavy metals adsorbed from wastewater and sewage. (C) 2016 Elsevier B.V. All rights reserved.
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