Controlling the surface chemistry of carbon xerogels using HNO3-hydrothermal oxidation

• Type: Article in International Scientific Journal
• Date: 2009

Authors

Adrián M. T. Silva (Author) FEUP; Bruno F. Machado (Author) FEUP; José L. Figueiredo (Author) FEUP; Joaquim L. Faria (Author) FEUP

Journal

Title: Carbon

Vol. 47 No. 7

Pages: 1670-1679

ISSN: 0008-6223

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 56 Citations

Scopus - 59 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

CORDIS: Technological sciences

Other information

Authenticus ID: P-003-JCG

DOI: 10.1016/j.carbon.2009.02.022

Abstract (EN): HNO3-hydrothermal oxidation is used to finely adjust the amount of oxygenated surface groups on a carbon xerogel to a desired degree. The extent of carbon surface functionalization is found to be strongly dependent on the concentration of nitric acid and is described by first order exponential correlations. Significant textural changes are not observed at low concentrations of HNO3, while an increase of the surface area of these materials is observed at high acid concentrations (0.10-0.30 mol l(-1)) at 473 K.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10