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چکیده
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The ultra-wide two dimensional Bi2S3 nanosheets (2D Bi2S3 Ns) as non-toxic graphene-like nanomaterials have been prepared through solvothermal decomposition of a single-source precursor, Bi(S2CNEt2)3, in ethylenediamine media for 2 h in 1808C. The morphology, structure, properties and catalytic activity of prepared 2D Bi2S3 Ns were characterized with XRD, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), UV-Visible spectroscopy, cyclic voltammetry (CV), amperometry, electrochemical charge/discharge technique and electrochemical impedance spectroscopy (EIS). The SEM image showed the 2D Bi2S3 Ns with a thickness of 154 nm and lengths of several micrometers is synthesized. The UVVis spectrum of 2D Bi2S3 Ns showed high sensitivity to visible-near infrared light with its direct energy band gap of 1.22 eV. These Bi2S3 Ns showed high electron transfer ability and good electrochemical behavior and also exhibited electrocatalytic activity toward the reduction-oxidation of hydrogen peroxide. It is found that Bi2S3 Ns could detect H2O2 at wide linear concentration range (50.0 mM–8.0 mM) with detection limit 8 mM, using amperometry as measuring technique. Also the synthesized Bi2S3 Ns exhibited excellent electrochemical H2 storage properties. As a result, based on above properties, the Bi2S3 Ns can be used as a valuable and useful nanomaterial for H2 storage, high-energy batteries, electrocatalytic fields and electrochemical sensing.
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