Solvothermal synthesis of porous SnS2 nanotubes with higher adsorption and photocatalytic activity

•SnS2 nanotubes were prepared by a solvothermal method.•SnS2 nanoflowers, nanoflakes and nanoparticles were prepared for comparison.•SnS2 nanotubes had far bigger specific surface area.•SnS2 nanotubes can adsorb much more amount of Cr(VI).•SnS2 nanotubes had far higher photocatalytic activity for th...

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Bibliographic Details
Published inSurface science Vol. 690; p. 121469
Main Author Wang, Shaoling
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.12.2019
Elsevier BV
Subjects
Adsorption
Catalytic activity
Electron microscopes
Hexagonal phase
Image transmission
Microstructure
Nanoparticles
Nanorods
Nanotubes
Nitrilotriacetic acid
Photocatalysis
Photoelectrons
Recyclability
Synthesis
Tin disulfide
Tin disulfide
Microstructure
Photocatalysis
Nanotubes
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Summary:•SnS2 nanotubes were prepared by a solvothermal method.•SnS2 nanoflowers, nanoflakes and nanoparticles were prepared for comparison.•SnS2 nanotubes had far bigger specific surface area.•SnS2 nanotubes can adsorb much more amount of Cr(VI).•SnS2 nanotubes had far higher photocatalytic activity for the reduction of Cr(VI). This letter reports for the first time on the photocatalysis of SnS2 nanotubes, with the goal of maximizing the potential of SnS2 for photocatalytic applications. SnS2 nanotubes were synthesized by a solvothermal method with the assistance of cobalt-nitrilotriacetic acid complex nanorods as the sacrificial template. The X-ray diffraction, Raman and X-ray photoelectron spectroscopy analyses indicated the formation of pure hexagonal phase SnS2. Scanning electron microscope and transmission electron microscope images revealed that the as-synthesized SnS2 comprised porous nanotubes, which were assembled from intertwined, 5 nm-thick nanosheets. Nitrogen adsorption-desorption isotherms disclosed that the as-synthesized SnS2 nanotubes had a much big specific surface area (232.8 m2/g). Photocatalytic experiments showed that the as-synthesized SnS2 nanotubes not only far surpassed SnS2 nanoflowers, nanoflakes and nanoparticles in the adsorption and visible-light-driven photocatalytic reduction of aqueous Cr(VI), but also had good recyclability. This study tells that the photocatalytic activity of SnS2 can be enhanced by the preparation of porous nanotubular microstructre. [Display omitted]
ISSN:0039-6028
1879-2758
DOI:10.1016/j.susc.2019.121469