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Enhanced photocatalytic activities of ZnO thin films: a comparative study of hybrid semiconductor nanomaterials

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Abstract

Nanostructure single ZnO, SnO2, In2O3 and composite ZnO/SnO2, ZnO/In2O3 and ZnO/SnO2/In2O3 films were prepared using sol–gel method. The obtained composite films were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV–Vis spectroscopy. The photocatalytic activities of composite films were investigated using phenol (P), 2,4-dichlorophenol (2,4-DCP), 4-chlorophenol (4-CP) and 4-aminophenol (4-AP) as a model organic compounds under UV light irradiation. Hybrid semiconductor thin films showed a higher photocatalytic activity than single component ZnO, SnO2 and In2O3 films. The substituted phenols degrade faster than phenol. The ease of degradation of phenols is different for each catalyst and the order of catalytic efficiency is also different for each phenol. The use of multiple components offered a higher control of their properties by varying the composition of the materials and related parameters such as morphology and interface. It was also found that the photocatalytic degradation of phenolic compounds on the composite films and single films followed pseudo-first order kinetics.

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Acknowledgments

The authors are grateful for the financial support provided by Islamic Azad University, Shahreza branch.

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  1. Science Faculty, Department of Chemistry, Shahreza Branch, Islamic Azad University, Women Research Council, 86145-311, Shahreza, Isfahan, Iran

    Nasrin Talebian & Razieh Ramazan Ghasem

  2. Engineering Department, Sharekord University, P.B. 115, Sharekord, Iran

    Mohmmad Reza Nilforoushan

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Talebian, N., Nilforoushan, M.R. & Ramazan Ghasem, R. Enhanced photocatalytic activities of ZnO thin films: a comparative study of hybrid semiconductor nanomaterials. J Sol-Gel Sci Technol 64, 36–46 (2012). https://doi.org/10.1007/s10971-012-2825-4

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