Comprehensive study on the influence of molybdenum substitution on characteristics and catalytic performance of magnetite nanoparticles

We prepared a number of heterogeneous catalysts by exchanging the structural iron of magnetite with molybdenum ions. To obtain the optimum value, Mo at various concentrations was coprecipitated with iron species (Fe3−x Mo x O4, x = 0.028, 0.069, 0.13, and 0.21). Characterization revealed that all th...

Full description

Saved in:
Bibliographic Details
Main Authors: Rahim Pouran, Shima, Bayrami, Abolfazl, Abdul Raman, Abdul Aziz, Daud, Wan Mohd Ashri Wan, Shafeeyan, Mohammad Saleh, Khataee, Alireza
Format: Article
Published: Springer Verlag 2018
Subjects:
Online Access:http://eprints.um.edu.my/20987/
https://doi.org/10.1007/s11164-017-3142-x
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Universiti Malaya
id my.um.eprints.20987
record_format eprints
spelling my.um.eprints.209872019-04-18T01:43:05Z http://eprints.um.edu.my/20987/ Comprehensive study on the influence of molybdenum substitution on characteristics and catalytic performance of magnetite nanoparticles Rahim Pouran, Shima Bayrami, Abolfazl Abdul Raman, Abdul Aziz Daud, Wan Mohd Ashri Wan Shafeeyan, Mohammad Saleh Khataee, Alireza Q Science (General) QD Chemistry TP Chemical technology We prepared a number of heterogeneous catalysts by exchanging the structural iron of magnetite with molybdenum ions. To obtain the optimum value, Mo at various concentrations was coprecipitated with iron species (Fe3−x Mo x O4, x = 0.028, 0.069, 0.13, and 0.21). Characterization revealed that all the samples had inverse spinel structure with excellent stability and magnetic properties. Higher Mo contents (x = 0.13 and 0.21) significantly improved the specific surface area of magnetite, leading to higher capacity for methylene blue (MB) adsorption. The catalytic performance of the samples for degradation of MB solution through Fenton reaction was then assessed. The Fe2.62Mo0.21O4 sample showed substantial activity, removing MB completely within 150 min. This enhanced activity is discussed based on the enlarged surface area, the role of surface Mo4+/Mo6+ redox pairs, and oxygen vacancies. Kinetic studies revealed that MB degradation by Fe3−x Mo x O4 nanoparticles in presence of H2O2 was well fit by a zeroth-order kinetics model. These results support use of such Fe3−x Mo x O4 materials as active magnetically separable heterogeneous catalysts, capable of degrading various contaminants through Fenton reaction. Springer Verlag 2018 Article PeerReviewed Rahim Pouran, Shima and Bayrami, Abolfazl and Abdul Raman, Abdul Aziz and Daud, Wan Mohd Ashri Wan and Shafeeyan, Mohammad Saleh and Khataee, Alireza (2018) Comprehensive study on the influence of molybdenum substitution on characteristics and catalytic performance of magnetite nanoparticles. Research on Chemical Intermediates, 44 (2). pp. 883-900. ISSN 0922-6168 https://doi.org/10.1007/s11164-017-3142-x doi:10.1007/s11164-017-3142-x
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic Q Science (General)
QD Chemistry
TP Chemical technology
spellingShingle Q Science (General)
QD Chemistry
TP Chemical technology
Rahim Pouran, Shima
Bayrami, Abolfazl
Abdul Raman, Abdul Aziz
Daud, Wan Mohd Ashri Wan
Shafeeyan, Mohammad Saleh
Khataee, Alireza
Comprehensive study on the influence of molybdenum substitution on characteristics and catalytic performance of magnetite nanoparticles
description We prepared a number of heterogeneous catalysts by exchanging the structural iron of magnetite with molybdenum ions. To obtain the optimum value, Mo at various concentrations was coprecipitated with iron species (Fe3−x Mo x O4, x = 0.028, 0.069, 0.13, and 0.21). Characterization revealed that all the samples had inverse spinel structure with excellent stability and magnetic properties. Higher Mo contents (x = 0.13 and 0.21) significantly improved the specific surface area of magnetite, leading to higher capacity for methylene blue (MB) adsorption. The catalytic performance of the samples for degradation of MB solution through Fenton reaction was then assessed. The Fe2.62Mo0.21O4 sample showed substantial activity, removing MB completely within 150 min. This enhanced activity is discussed based on the enlarged surface area, the role of surface Mo4+/Mo6+ redox pairs, and oxygen vacancies. Kinetic studies revealed that MB degradation by Fe3−x Mo x O4 nanoparticles in presence of H2O2 was well fit by a zeroth-order kinetics model. These results support use of such Fe3−x Mo x O4 materials as active magnetically separable heterogeneous catalysts, capable of degrading various contaminants through Fenton reaction.
format Article
author Rahim Pouran, Shima
Bayrami, Abolfazl
Abdul Raman, Abdul Aziz
Daud, Wan Mohd Ashri Wan
Shafeeyan, Mohammad Saleh
Khataee, Alireza
author_facet Rahim Pouran, Shima
Bayrami, Abolfazl
Abdul Raman, Abdul Aziz
Daud, Wan Mohd Ashri Wan
Shafeeyan, Mohammad Saleh
Khataee, Alireza
author_sort Rahim Pouran, Shima
title Comprehensive study on the influence of molybdenum substitution on characteristics and catalytic performance of magnetite nanoparticles
title_short Comprehensive study on the influence of molybdenum substitution on characteristics and catalytic performance of magnetite nanoparticles
title_full Comprehensive study on the influence of molybdenum substitution on characteristics and catalytic performance of magnetite nanoparticles
title_fullStr Comprehensive study on the influence of molybdenum substitution on characteristics and catalytic performance of magnetite nanoparticles
title_full_unstemmed Comprehensive study on the influence of molybdenum substitution on characteristics and catalytic performance of magnetite nanoparticles
title_sort comprehensive study on the influence of molybdenum substitution on characteristics and catalytic performance of magnetite nanoparticles
publisher Springer Verlag
publishDate 2018
url http://eprints.um.edu.my/20987/
https://doi.org/10.1007/s11164-017-3142-x
_version_ 1643691433956212736