High nuclearity Ni/Co polyoxometalates and colloidal TiO2 assemblies as efficient multielectron photocatalysts under visible or sunlight irradiation

R. Ngo Biboum; C. P. Nanseu Njiki; G. Zhang; U. Kortz; P. Mialane; A. Dolbecq; I. M. Mbomekalle; L. Nadjo; B. Keita

doi:10.1039/C0JM03180A

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High nuclearity Ni/Co polyoxometalates and colloidal TiO₂ assemblies as efficient multielectron photocatalysts under visible or sunlight irradiation†

R. Ngo Biboum,^a C. P. Nanseu Njiki,^a G. Zhang,^b U. Kortz,^c P. Mialane,^d A. Dolbecq,^d I. M. Mbomekalle,^d L. Nadjo^a and B. Keita*^a

Author affiliations

* Corresponding authors

^a Laboratoire de Chimie Physique, Groupe d'Electrochimie et de Photoélectrochimie, UMR 8000, CNRS, Université Paris-Sud, Bâtiment 350, Orsay cedex, France
E-mail: bineta.keita@u-psud.fr

^b Key laboratory of Green Process Engineering, Institute of Process Engineering, Chinese Academy of Science, Beijing, China

^c Jacobs University, School of Engineering and Science, P.O. Box 750 561, Bremen, Germany

^d Institut Lavoisier de Versailles, UMR 8180, Université de Versailles Saint-Quentin en Yvelines, 45 Avenue des Etats-Unis, Versailles cedex, France

Abstract

Visible or sunlight irradiation of high nuclearity cobalt- or nickel-centers containing polyoxometalates (POMs), alone or in association with colloidal TiO₂, results in their neat, apparently direct, multielectron reduction. These materials prove very effective in the first example of visible or sunlight driven POM-based degradation of Acid Orange 7.

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Article information

DOI: https://doi.org/10.1039/C0JM03180A
Article type: Communication
Submitted: 22 Sep 2010
Accepted: 10 Nov 2010
First published: 29 Nov 2010

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J. Mater. Chem., 2011,21, 645-650

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High nuclearity Ni/Co polyoxometalates and colloidal TiO₂ assemblies as efficient multielectron photocatalysts under visible or sunlight irradiation

R. N. Biboum, C. P. N. Njiki, G. Zhang, U. Kortz, P. Mialane, A. Dolbecq, I. M. Mbomekalle, L. Nadjo and B. Keita, J. Mater. Chem., 2011, 21, 645 DOI: 10.1039/C0JM03180A

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Journal of Materials Chemistry