GO was purchased from Sinocarbon Mate-
rials TechnologyCo.,Ltd,which was prepared by themodified
Hummer’s method.Tinoxide–graphene nanocomposites were
synthesized through the oxidation–reduction reaction between
GO and SnCl2 2H2O. In a typical synthesis,180mg SnCl2 2H2O
was dissolved in 40mL deionized(DI)water toob tain0.01M
SnCl2 aqueous solution.40mL0.08MNaOH aqueous solution
was added to the above solution,resulting in a white suspension.
Then, 32mgGOwasaddedtothewhitesuspension,with