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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Photocatalytic activity against Malachite green of both samples TiO2/2%Nd and TiO2/2%Sm compared to pure TiO2 obtained by metal alkoxide and Degussa P25: (a) under UV irradiation; (b) under Vis irradiation.