Abstract

CHANGA, Wei et al. Synthesis and photocatalytic activity of Zn_xCd_1-xS/TiO₂ heterostructures nanofibre prepared by combining electrospinning and hydrothermal method. S.Afr.j.chem. (Online) [online]. 2015, vol.68, pp.138-142. ISSN 1996-840X.  http://dx.doi.org/10.17159/0379-4350/2015/V68A20.

The Zn_xCd_1-xS/TiO₂ hierarchical heterostructures were successfully fabricated by combining electrospinning technology and hydrothermal methods. The morphology, crystallinity, composition and band gap of Zn_xCd_1-xS/TiO₂ were characterized by SEM, XRD, EDS, and UV-vis diffuse reflectance spectroscopy. The results indicated the sulphur concentration had a significant influence on the composition and morphology of the products. The values of the band gap energy for Zn_xCd_1-xS/TiO₂ varied from 2.33 to 2.66 eV with the change of sulphur concentration. When the molar ratio of S/Ti was 0.96, the Zn_xCd_1xS/TiO₂ hierarchical heterostructures exhibited enhanced visible light photocatalytic behaviour for the decomposition of Rhodamine B (RhB) under visible light irradiation. The photocatalytic degradation of RhB followed first-order reaction kinetics.

Keywords : Electrospinning; heterostructures; photocatalysis; dye degradition.

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