o:3260 Photocatalytic Degradation of Methylene Blue by Catalysts Prepared from Serbian Clinoptilolite and SnO2 Fotokatalitička degradacija metilensko plavog u prisustvu katalizatora na bazi klinoptilolita sa područja Srbije i SnO2 en Abstract: In this work, clinoptilolite-rich zeolitic tuff from the deposit Slanci (near Blegrade) was used for the preparation of a photocatalyst. Clinoptilolite surface was modified by Sn(IV) oxide in different amounts (3-15 wt.% Sn) using a simple procedure consisted of three steps: a) ion exchange, b) precipitation of Sn hydroxide and c) calcination under air at 400 oC. Photocatalytic activity was studied in water solution of methylene blue (MB) as a model pollutant with initial concentration of 10 ppm at room temperature, using different amounts of the prepared catalyst. The suspension was irradiated for 180 min in a solar simulator chamber with a visible-light lamp (8 mW cm–2). The prepared catalysts exhibited catalytic activity higher than pure SnO2 indicating a significant role of the clinoptilolite lattice in the photodegradation of MB. It is showed that the initial concentration of MB decreased for 45-75 % depending of the catalyst amount. Reusability of the catalyst was tested in three catalytic cycles showing that photocatalytic activity partially decreases which is ascribed to partial blockage of catalytically active sites. photocatalysis, zeolite, organic dyes 1552100 978-86-901238-0-3 2023-11-17T13:47:09.378Z 44 no 46 Jelena Pavlović Institute of Soil Science 0000-0001-9424-1080 46 Aleksandra Popović 46 Nevenka Rajić application/pdf 345348 https://unilib.phaidrabg.rs/o:3260 no yes 1 70 92000004 71A05 International scientific conference Environmental impact of illegal construction, poor planning and design IMPEDE 2019 2019