Porous metal oxide microspheres from ion exchange resin S. Picart, P. Parant, M. Caisso, E. Remy, H. Mokhtari, I. Jobelin, J.P. Bayle, C.L. Martin, P. Blanchart, A. Ayral and T. Delahaye Eur. Phys. J. Special Topics, 224 9 (2015) 1675-1687 Published online: 30 July 2015 DOI: 10.1140/epjst/e2015-02490-y