Naslov (eng)

Photocatalytic Degradation of Methylene Blue by Catalysts Prepared from Serbian Clinoptilolite and SnO2

Autor

Pavlović, Jelena
Popović, Aleksandra
Rajić, Nevenka

Opis (eng)

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.

Jezik

engleski

Datum

2019

Licenca

© All rights reserved

Predmet

photocatalysis, zeolite, organic dyes

Deo kolekcije (1)

o:508

Institut za zemljište