Tuning of texture and surface chemistry of carbon xerogels

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

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

Revista

Título: Journal of Colloid and Interface Science

Vol. 324

Páginas: 150-155

ISSN: 0021-9797

Editora: Elsevier

Indexação

ISI Web of Knowledge - 63 Citações

ISI Web of Science

Scopus - 67 Citações

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

CORDIS: Ciências Tecnológicas

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6