TAILIEUCHUNG - Novel Ag-ZnO-La2O2CO3 photocatalysts derived from the Layered Double Hydroxide structure with excellent photocatalytic performance for the degradation of pharmaceutical compounds

The experimental results show that the highest photocatalytic activity was obtained from the Ag (5) doped photocatalysts calcined at 500 0C with a degradation efficiency of 99,4 after 40 min of irradiation only. This study could provide a new route for the fabrication of high performance photocatalysts and facilitate their application in the environmental remediation issues. | Journal of Science Advanced Materials and Devices 4 2019 34e46 Contents lists available at ScienceDirect Journal of Science Advanced Materials and Devices journal homepage locate jsamd Original Article Novel Ag-ZnO-La2O2CO3 photocatalysts derived from the Layered Double Hydroxide structure with excellent photocatalytic performance for the degradation of pharmaceutical compounds A. Elhalil a R. Elmoubarki a M. Farnane a A. Machrouhi a . Mahjoubi b M. Sadiq a S. Qourzal c M. Abdennouri a N. Barka a a Laboratoire des Sciences des Mat eriaux des Milieux et de la Mod elisation Universit e Sultan Moulay Slimane . Khouribga . 145 25000 Khouribga Morocco b Universit e Sultan Moulay Slimane Facult e des Sciences et Techniques B eni Mellal Laboratoire de Spectro-chimie Appliqu ee et Environnement LSCAE 523 B eni - Mellal Morocco c Equipe de Catalyse et Environnement D epartement de Chimie Facult e des Sciences Universit e Ibn Zohr Cit e Dakhla Agadir Morocco a r t i c l e i n f o a b s t r a c t Article history In this work we have prepared the Ag-ZnO-La2O2CO3 nanomaterials as promising photocatalysts for the Received 11 September 2018 photocatalytic degradation of pharmaceutical pollutants. Firstly a series of ZnAl1-xLax CO3 0 x Received in revised form layered double hydroxides LDHs were synthesized by the co-precipitation method at the component 20 December 2018 molar ratio of Zn Al þ La 3 where La Al 0 and . Photocatalysts were prepared by the Accepted 4 January 2019 Available online 6 January 2019 calcination of the LDH precursors at different temperatures of 300 400 500 600 800 and 1000 C. The effects of the La Al molar ratio and the calcination temperature on the photocatalytic activity of the cat- alysts were evaluated by the degradation of caffeine as a model pharmaceutical pollutant in aqueous Keywords Layered double hydroxides solutions under the UV irradiation. Thereafter in order to increase the photocatalytic

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