access icon free Hydrothermal synthesis of SnO2–Zn2SnO4–graphene composites with high activity for photodegradation of rhodamine B

The SnO2–Zn2SnO4–graphene composite photocatalysts were successfully prepared by a facile hydrothermal reaction method in an ethanol–water solvent. The as-prepared catalysts were characterised by techniques of X-ray diffraction, Raman spectroscopy, transmission electron microscopy and N2-sorption. The catalytic activity test results show that this SnO2–Zn2SnO4–graphene composite possesses higher photocatalytic degradation of rhodamine B (RhB) activity than that of pure SnO2–Zn2SnO4 under UV-light irradiation in an aqueous solution. The improved photocatalytic activity may be due to the increased adsorbability for the RhB molecule, more active sites, more photocatalytic reaction centres and the prevention of the photogenerated electron–hole pair recombination.

Inspec keywords: adsorption; transmission electron microscopy; graphene; photochemistry; electron-hole recombination; tin compounds; X-ray diffraction; dyes; zinc compounds; crystal growth from solution; nitrogen; catalysts; composite materials; catalysis; Raman spectra

Other keywords: transmission electron microscopy; ethanol-water solvent; SnO2-Zn2SnO4-C; graphene; N2-sorption; photocatalytic reaction centres; aqueous solution; photogenerated electron-hole pair recombination; rhodamine B photodegradation; X-ray diffraction; hydrothermal synthesis; UV-light irradiation; molecule adsorbability; photocatalytic degradation activity; Raman spectroscopy; composite photocatalysts; N2

Subjects: Optical properties of graphene and graphene related materials (thin films, low-dimensional and nanoscale structures); Charge carriers: generation, recombination, lifetime, and trapping (semiconductors/insulators); Photolysis and photodissociation by IR, UV and visible radiation; Infrared and Raman spectra in inorganic crystals; Adsorption and desorption kinetics; evaporation and condensation; Structure of graphene and graphene-related materials; Crystal growth from solution; Preparation of graphene and graphene-related materials, intercalation compounds, and diamond; Heterogeneous catalysis at surfaces and other surface reactions; Low-dimensional structures: growth, structure and nonelectronic properties; Sorption and accommodation coefficients (surface chemistry); Electrical properties of graphene and graphene-related materials (thin films, low-dimensional and nanoscale structures)

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http://iet.metastore.ingenta.com/content/journals/10.1049/mnl.2015.0114
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