Synthesis, ch aracterization and photocat alytic activity of Mg /ZnO-Sn O۲ na noparticles

Dyes found in wastewater are well know n for their t oxicity and pose a threat to human health throug h contamination of water supplies, thus they s hould be re moved [۱]. Among different water purificatio processes photocatal ytic degradation of dyes by using nanostruc tured photo catalysts (TiO۲, ZnO,…) and UV irradiation has attracted e xtensive attention. How ever, the high degree of recomb ination of photogenerated electr on-hole pairs restricts their application. Therefore loweri ng the reco mbination of electron-ho le pairs is o f a great interest. Coupling two sem iconductor particles with different band gap widths and/or loading met als on the surface of sem iconductor s have been reported to be a beneficial way to achieve this goal [۲,۳]. Thus, the objective of this study is to prep are Mg/ZnO -SnO۲ nanoparticles and to charac terize this new composi te material and evaluate its photocataluytic activity in contrast to ZnO-S nO۲ coupled oxide for degradation of Methyl Orange (M O) as a model pollutant. Also the eff ect of different operational parameters on the p hotocatalyti c activity has been studied.

کلیدواژه ها:

Adva nced oxidation ، Nanopa rticles ، Phot ocatalysis ، Z nO-SnO۲.