Jump to ContentJump to Main Navigation
Show Summary Details
More options …

Journal of Advanced Oxidation Technologies

Ed. by Dionysiou, Dionysios D.


IMPACT FACTOR 2016: 0.564
5-year IMPACT FACTOR: 0.716

CiteScore 2016: 0.78

SCImago Journal Rank (SJR) 2015: 0.281
Source Normalized Impact per Paper (SNIP) 2015: 0.311

Online
ISSN
2371-1175
See all formats and pricing
More options …
Volume 19, Issue 2

Issues

Photocatalytic Activity of Suspended and Immobilized Niobium Oxide for Methanol Oxidation and Escherichia coli Inactivation

Lidiane A. Morais
  • Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933 Móstoles, Madrid, Spain Brazil
  • Institut of Chemistry, Universidade Federal do Rio Grande do Norte, Av. Senador Salgado Filho, nº 3000, Natal, RN, Brazil
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Cristina Adán
  • Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933 Móstoles, Madrid, Spain
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Antonio S. Araujo
  • Institut of Chemistry, Universidade Federal do Rio Grande do Norte, Av. Senador Salgado Filho, nº 3000, Natal, RN, Brazil
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Ana P.M.A. Guedes
  • Institut of Chemistry, Universidade Federal do Rio Grande do Norte, Av. Senador Salgado Filho, nº 3000, Natal, RN, Brazil
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Javier Marugán
  • Corresponding author
  • Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933 Móstoles, Madrid, Spain
  • Email
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2016-11-30 | DOI: https://doi.org/10.1515/jaots-2016-0209

Abstract

Materials based on niobium oxide (Nb2O5) have been shown to be alternative catalytic materials in heterogeneous photocatalytic processes for water treatment. Physicochemical characterization of a commercial Nb2O5 material was carried out to understand the impact on its photocatalytic activity, evaluated both in the photocatalytic oxidation of methanol and the inactivation of Escherichia coli bacteria under UVA. The Nb2O5 raw material showed an amorphous structure without X-ray diffraction signals. Thermal treatment of the material at temperatures above 550 °C leads to the formation of the orthorhombic phase of Nb2O5. However, annealing produce a significant aggregation of particles that reduced dramatically the surface area and the photocatalytic activity. The raw Nb2O5 material showed higher activity both for methanol oxidation and bacterial inactivation tests, being the latter very sensitive to the chemical composition of water. Immobilization of the photocatalyst in the walls of the photocatalytic reactor avoided the necessity of removal of the Nb2O5 particles after the treatment but decreases significantly the activity. In contrast, immobilization of the photocatalyst on a Raschig rings fixed-bed leads to a moderate decrease in activity (negligible in the presence of H2O2) that is counteracted by the improvement in the long term stability of the material.

Keywords : Niobium Oxide; Photocatalysis; Immobilized photocatalyst; methanol; Escherichia coli

About the article

Received: 2016-01-31

Revised: 2016-04-18

Accepted: 2016-04-21

Published Online: 2016-11-30

Published in Print: 2016-07-01


Citation Information: Journal of Advanced Oxidation Technologies, Volume 19, Issue 2, Pages 256–265, ISSN (Online) 2371-1175, ISSN (Print) 1203-8407, DOI: https://doi.org/10.1515/jaots-2016-0209.

Export Citation

© 2016 by Walter de Gruyter Berlin/Boston. Copyright Clearance Center

Comments (0)

Please log in or register to comment.
Log in