Tuning of texture and surface chemistry of carbon xerogels

• Type: Article in International Scientific Journal
• Date: 2008

Authors

Mahata, N (Author) Other; Manuel Fernando R Pereira (Author) FEUP; Suarez Garcia, F (Author) Other; Martinez Alonso, A (Author) Other; Tascon, JMD (Author) Other; José Luis Figueiredo (Author) FEUP

Journal

Title: Journal of Colloid and Interface Science

Vol. 324

Pages: 150-155

ISSN: 0021-9797

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 63 Citations

ISI Web of Science

Scopus - 67 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

CORDIS: Technological sciences

Other information

Authenticus ID: P-003-XC6

DOI: 10.1016/j.jcis.2008.05.006

Abstract (EN): The influence of different activation processes on the textural and surface chemical properties of carbon xerogels was studied. Carbon xerogels were prepared by the conventional sol-gel approach using resorcinol and formaldehyde: two different pHs of sol-gel processing led to carbon materials with distinct pore size distributions. The materials were subjected to controlled activation by three different methods: activation by oxygen plasma, activation by HNO3, and activation by diluted air. Treatments with HNO3 and diluted air created oxygen groups on the external surface as well as inside the pore channels, whereas plasma is more suitable for introducing oxygen groups selectively on the external surface. Nevertheless, it was shown that samples with wider pores can be oxidized to some extent on the pore interiors by plasma. Significant changes in total surface area by air activation were observed.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6