Synthesis of YAG:Ce/ZnO core/shell nanoparticles with enhanced UV-visible and visible light photocatalytic activity and
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Synthesis of YAG:Ce/ZnO core/shell nanoparticles with enhanced UV-visible and visible light photocatalytic activity and application for the antibiotic removal from aqueous media Lobna Zammouri1, Abdelhay Aboulaich2,a), Bruno Capoen3, Mohamed Bouazaoui3, Mohamed Sarakha2, Mostafa Stitou4, Rachid Mahiou2,b) 1
Faculté des Sciences de Tétouan, Laboratoire de l’Eau, d’Etude et des Analyses Environnementales, Université Abdelmalek Essaadi, Tétouan 93002, Morocco; and Université Clermont Auvergne, Institut de Chimie de Clermont Ferrand UMR 6296 CNRS/UBP/Sigma Clermont, Aubiere Cedex 63178, France 2 Université Clermont Auvergne, Institut de Chimie de Clermont Ferrand UMR 6296 CNRS/UBP/Sigma Clermont, Aubiere Cedex 63178, France 3 Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM), CNRS (UMR 8523), CERLA/IRCICA, Université Lille 1-Sciences et Technologies, F-59655 Villeneuve d’ascq Cedex, France 4 Faculté des Sciences de Tétouan, Laboratoire de l’Eau, d’Etude et des Analyses Environnementales, Université Abdelmalek Essaadi, Tétouan 93002, Morocco a) Address all correspondence to these authors. e-mail: [email protected] b) e-mail: [email protected] Received: 13 October 2018; accepted: 7 January 2019
We report the first synthesis of highly homogenous Ce-doped YAG/ZnO core/shell nanoparticles (YAG:Ce/ZnO CSN) based on the hydrolysis/condensation of Zn(OAc)2 on the surface of YAG:Ce nanoparticles (NPs). Results show that YAG:Ce NPs of about 100 nm diameter are homogenously surrounded by a multilayer of highly crystallized ZnO nanocrystals (ZnO NCs) of 10–15 nm diameter with a core/shell structure. The as-prepared nanostructures have been used in the photocatalytic degradation of sulfathiazole (STZ), which is a molecule widely used as antibiotic, under UV-vis and visible light. The effect of YAG:Ce/ZnO weight ratio and YAG:Ce particle size on the photocatalytic efficiency of YAG:Ce/ZnO core/shell structures has been studied. The YAG:Ce/ ZnO weight ratio of 1/1 was found to yield the optimal photocatalytic activity. Results also showed that YAG: Ce/ZnO CSN with 100 nm core size exhibited much higher photocatalytic activity compared to YAG:Ce/ZnO CSN with micro-sized YAG;Ce core. The recyclability of YAG:Ce/ZnO CSN photocatalyst was also demonstrated over at least 10 photocatalytic degradation cycles.
Introduction Nowadays, the penetration of pharmaceuticals such as antibiotic agents into the environment and ecosystems, in both highly industrialized and developing countries, is one of the major environmental and public health issues that both industrials and public authorities need to face up to [1, 2]. Sulfonamides such as sulfathiazole (STZ) are an important family of antibiotics that are still commonly used in human and veterinary medicine [3, 4, 5]. For instance, STZ is particularly used in livestock production and may potentially be released into the environment. As a result, water, soil and food can be contaminated by
ª Materials Research Society 2019
antibiotic resistant microorganisms and cause a se
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