Zero-valent iron supported on nitrogen-doped carbon xerogel as catalysts for the oxidation of phenol by fenton-like system

• Type: Article in International Scientific Journal
• Date: 2018

Authors

S. A. Messele (Author) Other; Olívia S. G. P. Soares (Author) FEUP; José Melo Orfão (Author) FEUP; C. Bengoa (Author) Other; J. Font (Author) Other

Journal

Title: ENVIRONMENTAL TECHNOLOGY

Vol. 39 No. 22

Pages: 2951-2958

ISSN: 0959-3330

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 6 Citations

ISI Web of Science

Scopus - 13 Citations

INSPEC

Other information

Authenticus ID: P-00N-3RN

DOI: 10.1080/09593330.2017.1370021

Abstract (EN): Nitrogen-free and nitrogen-doped carbon xerogel materials, from urea and melamine precursors, were prepared at different pH and evaluated as adsorbents/catalysts in the removal of phenol. Then, zero-valent iron (ZVI) was supported on these carbon xerogel materials and its activity was again evaluated for phenol removal by adsorption and catalytic wet peroxide oxidation (CWPO). The prepared samples were characterized by N-2 adsorption at -196 degrees C, pH at the point of zero charge (pH(PZC)) and elemental analysis. The textural properties of the N-free and N-doped carbon xerogels are strongly influenced by pH of the preparation solution and precursor used. The presence of ZVI on all carbon xerogel supports improved the phenol removal efficiency. ZVI supported on urea- and melamine-doped carbon xerogels show a good performance, reaching above 87% phenol conversion after 60 min of CWPO. On the contrary, pure adsorption and CWPO using the same materials without the presence of ZVI gives low phenol removal efficiency. A correlation was found between the activity of ZVI catalysts in CWPO and the N-content of the supports.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8