Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

Structural effects induced by dialysis-based purification of carbon nanomaterials

Veloso, AD, Ferraria, AM, Botelho do Rego, AM, Viana, AS, Fernandes, AJS, Fielding, AJ, Videira, RA and Oliveira, MC (2023) Structural effects induced by dialysis-based purification of carbon nanomaterials. Nano Materials Science. ISSN 2096-6482

Structural effects induced by dialysis based purification of carbon nanomaterials .pdf - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (1MB) | Preview


Dialysis plays a crucial role in the purification of nanomaterials but its impact on the structural properties of carbon nanomaterials was never investigated. Herein, a carbon-based nanomaterial generated electrochemically in potassium phosphate buffer, was characterized before and after dialysis against pure water. It is shown that dialysis affects the size of the carbon domains, structural organization, surface functionalization, oxidation degree of carbon, and grade of amorphicity. Accordingly, dialysis drives the nanomaterial organization from discrete roundish carbon domains, with sizes ranging from 70 to 160 nm, towards linear stacking structures of small nanoparticles (<15 ​nm). In parallel, alcohol and ether (epoxide) surface groups evolve into more oxidized carbon groups (e.g., ketone and ester groups). Investigation of the as-prepared nanomaterial by electron paramagnetic resonance (EPR) revealed a resonance signal consistent with carbon-oxygen centred radicals. Additionally, this study brings to light the selective affinity of the carbon nanomaterial under study to capture Na+ ions, a property greatly enhanced by the dialysis process, and its high ability to trap oxygen, particularly before dialysis. These findings open new perspectives for the application of carbon-based nanomaterials and raise awareness of the importance of structural changes that can occur during the purification of carbon-based nanomaterials.

Item Type: Article
Subjects: R Medicine > RS Pharmacy and materia medica
Divisions: Pharmacy & Biomolecular Sciences
Publisher: Elsevier BV
SWORD Depositor: A Symplectic
Date Deposited: 11 Jan 2024 14:32
Last Modified: 11 Jan 2024 14:32
DOI or ID number: 10.1016/j.nanoms.2023.12.002
URI: https://researchonline.ljmu.ac.uk/id/eprint/22251
View Item View Item