Highly active N-doped carbon nanotubes prepared by an easy ball milling method for advanced oxidation processes

• Type: Article in International Scientific Journal
• Date: 2016

Authors

O. S. G. P. Soares (Author) FEUP; A. G. Gonçalves (Author) FEUP; J. L. Figueiredo (Author) FEUP; J. J. M. Orfão (Author) FEUP; M. F. R. Pereira (Author) FEUP; R. P. Rocha (Author) Other

Journal

Title: Applied Catalysis B: Environmental

Vol. 192

Pages: 296-303

ISSN: 0926-3373

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 43 Citations

Scopus - 65 Citations

Associated Projects

LSRE-LCM - Laboratório de Processos de Separação e Reação - Laboratório de Catálise e Materiais

Other information

Authenticus ID: P-00K-CHZ

DOI: 10.1016/j.apcatb.2016.03.069

Abstract (EN): The performance of novel N-doped carbon materials prepared by an easy ball milling method was evaluated in two distinct advanced oxidation processes (AOPs): catalytic wet air oxidation (CWAO) and catalytic ozonation (COZ), using oxalic acid as model pollutant. The ball milling method allows the incorporation of large amounts of N-groups onto the surface of carbon nanotubes, namely pyridine-like N atoms (N-6), pyrrole-like N atoms (N-5) and quaternary nitrogen (N-Q), resulting in highly active catalysts for the oxidation of oxalic acid by both AOPs. The material prepared by ball milling with melamine without solvent is the most promising sample, combining an easy preparation with high amount of N-functionalities. Under the operation conditions used, oxalic acid was completely mineralized in 5 min by CWAO and in 4h by COZ. The novel metal-free catalyst developed by this easy ball milling method demonstrated to be effective, confirming that this solvent-free methodology is quite adequate for the preparation of N-doped carbon materials with enhanced properties for the mineralization of organic pollutants by the studied processes.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8