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Journal of Nanomaterials
Volume 2015 (2015), Article ID 985872, 9 pages
http://dx.doi.org/10.1155/2015/985872
Research Article

Synthesis Method Effect of CoFe2O4 on Its Photocatalytic Properties for H2 Production from Water and Visible Light

1Laboratorio Nacional de Nanotecnología, Departamento de Materiales Nanoestructurados, Centro de Investigación en Materiales Avanzados S. C., Miguel de Cervantes 120, 31109 Chihuahua, CHIH, Mexico
2Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Campus Universitario No. 2, 31125 Chihuahua, CHIH, Mexico

Received 11 October 2014; Revised 20 December 2014; Accepted 24 December 2014

Academic Editor: Zhenyi Zhang

Copyright © 2015 Yudith Ortega López et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Currently, the need for more efficient materials that work in the visible light spectrum for hydrogen production has been increasing. Under this criterion, ferrites are ideal because their energetic properties are favorable to photocatalysis as they have a low band gap (1.5 to 3 ev). In this particular research, ferrite is presented as a hydrogen producer. Cobalt ferrites were synthesized by chemical coprecipitation (CP) and ball milling (BM) for comparison of their performance. The characterization of the materials was carried out with X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), BET surface area, UV-VIS spectroscopy, and water adsorption/desorption tests. Evaluation of the photocatalytic activity under visible light was followed by gas chromatography. The results showed that cobalt ferrite by ball milling had a higher photocatalytic activity; this is attributed to the vacancies generated during the milling process at which the sample was exposed.