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Ionic liquid-assisted, facile synthesis of ZnO/SnO2 nanocomposites, and investigation of their photocatalytic activity

2011; Elsevier BV; Volume: 68; Linguagem: Inglês

10.1016/j.matlet.2011.10.028

1873-4979

Elaheh Kowsari, Mohammad Reza Ghezelbash,

Advanced Photocatalysis Techniques

ZnO/SnO2 nanostructured photocatalysts have been successfully synthesized by a hydrothermal method in the presence of the chiral ionic liquid (CIL) ditetrabutylammonium tartrate, [TBA]2[l-Tar], and used for the photocatalytic degradation of methyl orange. It was found that the reaction time and the amount of CIL influence the growth mechanism, the optical properties, and the surface area of the ZnO/SnO2 nanostructures. The results revealed that using different ratios of Zn2 +/Sn4 + affects the phase and morphology of the ZnO/SnO2 nanocomposite materials. The photocatalytic activity enhancement of the coupled ZnO–SnO2 composites may be due to significant differences in BET surface areas for samples with different morphologies. A ZnO/SnO2 nanostructure with nanoplate morphology and higher surface area (BET) exhibited a significant enhancement of photocatalytic activity toward the degradation of methyl orange as compared with the other samples. A formation mechanism for these products is proposed.