Evidence for a core-shell structure of hydrothermal carbon. (May 2020)
- Record Type:
- Journal Article
- Title:
- Evidence for a core-shell structure of hydrothermal carbon. (May 2020)
- Main Title:
- Evidence for a core-shell structure of hydrothermal carbon
- Authors:
- Higgins, Luke J.R.
Brown, Andy P.
Harrington, John P.
Ross, Andrew B.
Kaulich, Burkhard
Mishra, Bhoopesh - Abstract:
- Abstract: Hydrothermal carbonisation (HTC) has been demonstrated to be a sustainable thermochemical process, capable of producing functionalised carbon materials for a wide range of applications. In order to better apply such materials, the local chemistry and reaction pathways governing hydrothermal carbon growth must be understood. We report the use of scanning transmission X-ray microscopy (STXM) to observe chemical changes in the functionality of carbon between the interface and bulk regions of HTC. Spatially-resolved, element-specific X-ray photo-absorption spectra show the presence of differing local carbon chemistry between bulk "core" and interface "shell" regions of a glucose-derived hydrothermal carbon spherule. STXM provides direct evidence to suggest that mechanistic pathways differ between the core and shell of the hydrothermal carbon. In the shell region, at the water-carbon interface, more aldehyde and/or carboxylic species are suspected to provide a reactive interface for bridging reactions to occur with local furan-based monomers. In contrast, condensation reactions appear to dominate in the core, removing aryl-linking units between polyfuranic domains. The application of STXM to HTC presents opportunities for a more comprehensive understanding of the spatial distribution of carbon species within hydrothermal carbon, especially at the solvent-carbon interface. Graphical abstract: Image 1
- Is Part Of:
- Carbon. Volume 161(2020)
- Journal:
- Carbon
- Issue:
- Volume 161(2020)
- Issue Display:
- Volume 161, Issue 2020 (2020)
- Year:
- 2020
- Volume:
- 161
- Issue:
- 2020
- Issue Sort Value:
- 2020-0161-2020-0000
- Page Start:
- 423
- Page End:
- 431
- Publication Date:
- 2020-05
- Subjects:
- Carbon -- Periodicals
Carbone -- Périodiques
Koolstof
Toepassingen
Electronic journals
546.681 - Journal URLs:
- http://www.sciencedirect.com/science/journal/00086223 ↗
http://www.elsevier.com/journals ↗ - DOI:
- 10.1016/j.carbon.2020.01.060 ↗
- Languages:
- English
- ISSNs:
- 0008-6223
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 3050.991000
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 13459.xml