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Abstract
SnO 2/SnS 2 nanocomposite with a heterojunction structure (that is, SnO 2 nanoparticles-decorated SnS 2 nanoplates) was synthesized via the hydrothermal reaction between SnO 2 nanoparticles and thioacetamide in 5 vol.% acetic acid aqueous solution at 150 °C for 3 h, and characterized by X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microscopy and UV–vis diffuse reflectance spectra. The photocatalytic activity of the hydrothermally synthesized SnO 2/SnS 2 nanocomposite was tested by degrading methyl orange in distilled water under visible light (λ > 420 nm) irradiation. It was found that the hydrothermally synthesized SnO 2/SnS 2 nanocomposite exhibited superior photocatalytic activity to SnO 2 nanoparticles, SnS 2 nanoplates and physically mixed SnO 2/SnS 2 nanocomposite. The heterojunction structure of the hydrothermally synthesized SnO 2/SnS 2 nanocomposite, which can facilitate interfacial electron transfer and reduce the self-agglomeration of two components, was considered to play an important role in achieving its higher photocatalytic activity.
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